{"id":74985,"date":"2026-02-11T06:41:30","date_gmt":"2026-02-10T22:41:30","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/74985.html"},"modified":"2026-02-11T06:41:30","modified_gmt":"2026-02-10T22:41:30","slug":"javascript-%e8%bf%ad%e4%bb%a3%e5%99%a8%e4%b8%8e%e7%94%9f%e6%88%90%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/74985.html","title":{"rendered":"JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668"},"content":{"rendered":"<\/p>\n<h4>JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668<\/h4>\n<ul>\n<li>\u524d\u8a00&#xff1a;\u4ece for&#8230;of \u8bf4\u8d77<\/li>\n<li>\u7406\u89e3\u8fed\u4ee3\u548c\u8fed\u4ee3\u5668\u6a21\u5f0f<\/li>\n<li>\n<ul>\n<li>\u4ec0\u4e48\u662f\u8fed\u4ee3&#xff1f;<\/li>\n<li>\u8fed\u4ee3\u5668\u6a21\u5f0f<\/li>\n<li>\u8fed\u4ee3\u5668\u6a21\u5f0f\u793a\u610f\u56fe<\/li>\n<\/ul>\n<\/li>\n<li>\u53ef\u8fed\u4ee3\u534f\u8bae\u4e0e\u8fed\u4ee3\u5668\u534f\u8bae<\/li>\n<li>\n<ul>\n<li>\u53ef\u8fed\u4ee3\u534f\u8bae&#xff08;Iterable Protocol&#xff09;<\/li>\n<li>\u8fed\u4ee3\u5668\u534f\u8bae&#xff08;Iterator Protocol&#xff09;<\/li>\n<li>\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668<\/li>\n<li>\u63d0\u524d\u7ec8\u6b62\u8fed\u4ee3\u5668<\/li>\n<li>\u666e\u901a\u5bf9\u8c61\u53ef\u8fed\u4ee3<\/li>\n<\/ul>\n<\/li>\n<li>\u751f\u6210\u5668<\/li>\n<li>\n<ul>\n<li>\u751f\u6210\u5668\u57fa\u7840<\/li>\n<li>\u751f\u6210\u5668\u7684\u51e0\u79cd\u5f62\u5f0f<\/li>\n<li>\n<ul>\n<li>\u751f\u6210\u5668\u51fd\u6570\u58f0\u660e<\/li>\n<li>\u751f\u6210\u5668\u51fd\u6570\u8868\u8fbe\u5f0f<\/li>\n<li>\u4f5c\u4e3a\u5bf9\u8c61\u65b9\u6cd5\u7684\u751f\u6210\u5668<\/li>\n<li>\u4f5c\u4e3a\u7c7b\u65b9\u6cd5\u7684\u751f\u6210\u5668<\/li>\n<\/ul>\n<\/li>\n<li>yield \u5173\u952e\u5b57<\/li>\n<li>\u751f\u6210\u5668\u7684\u6267\u884c\u6d41\u7a0b<\/li>\n<li>\u751f\u6210\u5668\u7684\u53cc\u5411\u901a\u4fe1<\/li>\n<li>\u63d0\u524d\u7ec8\u6b62\u751f\u6210\u5668<\/li>\n<li>\n<ul>\n<li>return()<\/li>\n<li>throw()<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u751f\u6210\u5668\u4e0e\u8fed\u4ee3\u5668\u7684\u5173\u7cfb<\/li>\n<li>\u7528\u751f\u6210\u5668\u5b9e\u73b0 async\/await \u7684 Polyfill<\/li>\n<li>\u7ed3\u8bed<\/li>\n<\/ul>\n<p>\u5f53\u6211\u4eec\u9700\u8981\u5728 JavaScript \u904d\u5386\u6570\u7ec4\u3001\u5904\u7406\u5f02\u6b65\u6570\u636e\u6d41&#xff0c;\u751a\u81f3\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7ed3\u6784\u65f6&#xff0c;\u8fed\u4ee3\u5668\u548c\u751f\u6210\u5668\u662f\u5176\u4e2d\u5f3a\u5927\u800c\u4f18\u96c5\u7684\u5de5\u5177\u3002\u7406\u89e3\u5b83\u4eec\u4e0d\u4ec5\u80fd\u5199\u51fa\u66f4\u7b80\u6d01\u7684\u4ee3\u7801&#xff0c;\u8fd8\u80fd\u6df1\u5165\u7406\u89e3 JavaScript \u5f02\u6b65\u7f16\u7a0b\u7684\u5e95\u5c42\u539f\u7406\u3002<\/p>\n<h2>\u524d\u8a00&#xff1a;\u4ece for\u2026of \u8bf4\u8d77<\/h2>\n<p><span class=\"token keyword\">const<\/span> arr <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f20\u7edf\u7684\u904d\u5386\u65b9\u5f0f<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ 1, 2, 3<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ for&#8230;of <\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> item <span class=\"token keyword\">of<\/span> arr<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ 1, 2, 3<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5f53\u6211\u4eec\u5728\u4f7f\u7528 for&#8230;of \u8fd9\u80cc\u540e\u53d1\u751f\u4e86\u4ec0\u4e48&#xff1f;\u4e3a\u4ec0\u4e48\u5bf9\u8c61\u4e0d\u80fd\u76f4\u63a5\u7528 for&#8230;of&#xff1f;<\/p>\n<p>\u8fd9\u90fd\u548c JavaScript \u7684\u8fed\u4ee3\u534f\u8bae\u6709\u5173\u3002\u7406\u89e3\u8fd9\u4e2a\u534f\u8bae&#xff0c;\u6211\u4eec\u5c31\u80fd\u8ba9\u4efb\u4f55\u5bf9\u8c61\u90fd\u652f\u6301\u8fd9\u79cd\u4f18\u96c5\u7684\u904d\u5386\u65b9\u5f0f\u3002<\/p>\n<h2>\u7406\u89e3\u8fed\u4ee3\u548c\u8fed\u4ee3\u5668\u6a21\u5f0f<\/h2>\n<h3>\u4ec0\u4e48\u662f\u8fed\u4ee3&#xff1f;<\/h3>\n<p>\u8fed\u4ee3\u662f\u6307\u6309\u7167\u67d0\u79cd\u987a\u5e8f\u9010\u4e2a\u8bbf\u95ee\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u7684\u8fc7\u7a0b\u3002\u5728\u5f00\u53d1\u4e2d&#xff0c;\u6211\u4eec\u51e0\u4e4e\u6bcf\u5929\u90fd\u5728\u8fdb\u884c\u8fed\u4ee3\u64cd\u4f5c&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ 1. \u6570\u7ec4\u8fed\u4ee3<\/span><br \/>\n<span class=\"token keyword\">const<\/span> arr <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\narr<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">task<\/span> <span class=\"token operator\">&#061;&gt;<\/span> console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>task<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ 2. \u5b57\u7b26\u4e32\u8fed\u4ee3<\/span><br \/>\n<span class=\"token keyword\">const<\/span> str <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;hello&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> char <span class=\"token keyword\">of<\/span> str<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>char<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ 3. Map\/Set \u8fed\u4ee3<\/span><br \/>\n<span class=\"token keyword\">const<\/span> map <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Map<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;a&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;b&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">[<\/span>key<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">of<\/span> map<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u8fed\u4ee3\u5668\u6a21\u5f0f<\/h3>\n<p>\u8fed\u4ee3\u5668\u6a21\u5f0f\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f&#xff0c;\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u6cd5&#xff0c;\u987a\u5e8f\u8bbf\u95ee\u4e00\u4e2a\u805a\u5408\u5bf9\u8c61&#xff08;\u53ef\u8fed\u4ee3\u5bf9\u8c61&#xff09;\u4e2d\u7684\u5404\u4e2a\u5143\u7d20&#xff0c;\u800c\u53c8\u4e0d\u66b4\u9732\u8be5\u5bf9\u8c61\u7684\u5185\u90e8\u8868\u793a\u3002<\/p>\n<h3>\u8fed\u4ee3\u5668\u6a21\u5f0f\u793a\u610f\u56fe<\/h3>\n<p>        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n        \u2502 \u805a\u5408\u5bf9\u8c61 \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n             \u2502<br \/>\n             \u25bc<br \/>\n        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510         \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n        \u2502 \u8fed\u4ee3\u5668\u5de5\u5382   \u2502\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2192 \u2502 \u5143\u7d20     \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518         \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n             \u2502                         \u2502<br \/>\n             \u25bc                         \u25bc<br \/>\n        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510             \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n        \u2502 \u8fed\u4ee3\u5668   \u2502\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2192 \u2502 \u5143\u7d20     \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518             \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n             \u2502                         \u2502<br \/>\n             \u25bc                         \u25bc<br \/>\n        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510             \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n        \u2502 \u8fed\u4ee3\u5668   \u2502\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2192 \u2502 \u5143\u7d20     \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518             \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n             \u2502                         \u2502<br \/>\n             \u25bc                         \u25bc<br \/>\n        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510             \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n        \u2502  <span class=\"token operator\">&#8230;<\/span>    \u2502             \u2502  <span class=\"token operator\">&#8230;<\/span>    \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518             \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n<h2>\u53ef\u8fed\u4ee3\u534f\u8bae\u4e0e\u8fed\u4ee3\u5668\u534f\u8bae<\/h2>\n<p>JavaScript \u901a\u8fc7\u4e24\u4e2a\u534f\u8bae\u5b9a\u4e49\u4e86\u8fed\u4ee3\u884c\u4e3a&#xff1a;<\/p>\n<h3>\u53ef\u8fed\u4ee3\u534f\u8bae&#xff08;Iterable Protocol&#xff09;<\/h3>\n<p>\u5bf9\u8c61\u9700\u8981\u5b9e\u73b0 Iterable \u63a5\u53e3&#xff08;\u53ef\u8fed\u4ee3\u534f\u8bae&#xff09;&#xff0c;\u5e76\u66b4\u9732\u4e00\u4e2a\u9ed8\u8ba4\u5c5e\u6027\u4f5c\u4e3a\u201c\u9ed8\u8ba4\u8fed\u4ee3\u5668\u201d&#xff0c;\u800c\u4e14\u8fd9\u4e2a\u5c5e\u6027\u5fc5\u987b\u4f7f\u7528\u7279\u6b8a\u7684 Symbol.interator \u4f5c\u4e3a\u952e\u3002<\/p>\n<h3>\u8fed\u4ee3\u5668\u534f\u8bae&#xff08;Iterator Protocol&#xff09;<\/h3>\n<p>\u5bf9\u8c61\u9700\u8981\u5b9e\u73b0 next() \u65b9\u6cd5&#xff0c;\u8fd4\u56de\u4e00\u4e2a IteratorResult \u5bf9\u8c61&#xff0c;\u5176\u4e2d\u5305\u62ec\u8fed\u4ee3\u5668\u8fd4\u56de\u7684\u4e0b\u4e00\u4e2a\u503c&#xff1b;\u5982\u679c\u4e0d\u8c03\u7528 next() \u65b9\u6cd5&#xff0c;\u5219\u65e0\u6cd5\u77e5\u9053\u8fed\u4ee3\u5668\u7684\u5f53\u524d\u4f4d\u7f6e\u3002<\/p>\n<h3>\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668<\/h3>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Range<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">constructor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">start<span class=\"token punctuation\">,<\/span> end<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>start <span class=\"token operator\">&#061;<\/span> start<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>end <span class=\"token operator\">&#061;<\/span> end<span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token comment\">\/\/ \u5b9e\u73b0\u53ef\u8fed\u4ee3\u534f\u8bae<\/span><br \/>\n  <span class=\"token punctuation\">[<\/span>Symbol<span class=\"token punctuation\">.<\/span>iterator<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">let<\/span> current <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>start<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> end <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>end<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fd4\u56de\u8fed\u4ee3\u5668\u5bf9\u8c61&#xff08;\u5b9e\u73b0\u8fed\u4ee3\u5668\u534f\u8bae&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>current <span class=\"token operator\">&lt;&#061;<\/span> end<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token keyword\">const<\/span> value <span class=\"token operator\">&#061;<\/span> current<span class=\"token punctuation\">;<\/span><br \/>\n          current <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n          <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> value<span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">false<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">value<\/span><span class=\"token operator\">:<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668<\/span><br \/>\n<span class=\"token keyword\">const<\/span> range <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> iterator <span class=\"token operator\">&#061;<\/span> range<span class=\"token punctuation\">[<\/span>Symbol<span class=\"token punctuation\">.<\/span>iterator<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 1, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 2, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 3, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 4, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 5, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: undefined, done: true }<\/span><\/p>\n<h3>\u63d0\u524d\u7ec8\u6b62\u8fed\u4ee3\u5668<\/h3>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d&#xff0c;\u6211\u4eec\u81ea\u5b9a\u4e49\u4e86\u4e00\u4e2a\u8fed\u4ee3\u5668&#xff0c;\u5176\u5b9e&#xff0c;\u5b83\u8fd8\u6709\u4e24\u4e2a\u53ef\u9009\u7684\u65b9\u6cd5&#xff0c;\u7528\u6765\u63d0\u524d\u7ec8\u6b62\u8fed\u4ee3\u5668&#xff1a;return() \u548c throw() &#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Range<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">constructor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">start<span class=\"token punctuation\">,<\/span> end<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>start <span class=\"token operator\">&#061;<\/span> start<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>end <span class=\"token operator\">&#061;<\/span> end<span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token comment\">\/\/ \u5b9e\u73b0\u53ef\u8fed\u4ee3\u534f\u8bae<\/span><br \/>\n  <span class=\"token punctuation\">[<\/span>Symbol<span class=\"token punctuation\">.<\/span>iterator<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">let<\/span> current <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>start<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> end <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>end<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fd4\u56de\u8fed\u4ee3\u5668\u5bf9\u8c61&#xff08;\u5b9e\u73b0\u8fed\u4ee3\u5668\u534f\u8bae&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>current <span class=\"token operator\">&lt;&#061;<\/span> end<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token keyword\">const<\/span> value <span class=\"token operator\">&#061;<\/span> current<span class=\"token punctuation\">;<\/span><br \/>\n          current <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n          <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> value<span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">false<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">value<\/span><span class=\"token operator\">:<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token comment\">\/\/ \u53ef\u9009&#xff1a;\u5b9e\u73b0 return \u65b9\u6cd5&#xff0c;\u7528\u4e8e\u63d0\u524d\u7ec8\u6b62\u8fed\u4ee3<\/span><br \/>\n      <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u8fed\u4ee3\u63d0\u524d\u7ec8\u6b62&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>      <span class=\"token comment\">\/\/ \u53ef\u9009&#xff1a;\u5b9e\u73b0 throw \u65b9\u6cd5&#xff0c;\u7528\u4e8e\u629b\u51fa\u5f02\u5e38<\/span><br \/>\n      <span class=\"token keyword\">throw<\/span><span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u8fed\u4ee3\u5668\u629b\u51fa\u5f02\u5e38:&#039;<\/span><span class=\"token punctuation\">,<\/span> error<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">done<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u666e\u901a\u5bf9\u8c61\u53ef\u8fed\u4ee3<\/h3>\n<p>\u5728\u5f15\u8a00\u7684\u4f8b\u5b50\u4e2d&#xff0c;\u6211\u4eec\u6709\u63d0\u5230\u666e\u901a\u5bf9\u8c61\u4e0d\u80fd\u4f7f\u7528 for&#8230;of \u8fed\u4ee3\u904d\u5386&#xff0c;\u56e0\u6b64\u666e\u901a\u5bf9\u8c61\u4e0d\u5c5e\u4e8e\u53ef\u8fed\u4ee3\u5bf9\u8c61&#xff0c;\u90a3\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u505a&#xff0c;\u624d\u80fd\u8ba9\u666e\u901a\u5bf9\u8c61\u4e5f\u53ef\u4ee5\u8fed\u4ee3\u5462&#xff1f;<\/p>\n<p><span class=\"token keyword\">const<\/span> obj <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">a<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">b<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">c<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">3<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nobj<span class=\"token punctuation\">[<\/span>Symbol<span class=\"token punctuation\">.<\/span>iterator<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> key <span class=\"token keyword\">in<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">hasOwnProperty<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token keyword\">yield<\/span> <span class=\"token punctuation\">[<\/span>key<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">[<\/span>key<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>o <span class=\"token keyword\">of<\/span> obj<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>o<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u751f\u6210\u5668<\/h2>\n<h3>\u751f\u6210\u5668\u57fa\u7840<\/h3>\n<p>\u751f\u6210\u5668ES6 \u5f15\u5165\u7684\u7279\u6b8a\u51fd\u6570&#xff0c;\u5b83\u53ef\u4ee5\u6682\u505c\u548c\u6062\u590d\u6267\u884c&#xff0c;\u662f\u521b\u5efa\u8fed\u4ee3\u5668\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5176\u5f62\u5f0f\u662f\u4e00\u4e2a\u51fd\u6570&#xff0c;\u51fd\u6570\u540d\u79f0\u524d\u9762\u52a0\u4e00\u4e2a\u661f\u53f7&#xff08;*&#xff09;\u8868\u793a\u5b83\u662f\u4e00\u4e2a\u751f\u6210\u5668\u3002<\/p>\n<p>\u6ce8&#xff1a;\u7bad\u5934\u51fd\u6570\u4e0d\u80fd\u7528\u6765\u5b9a\u4e49\u751f\u6210\u5668\u3002<\/p>\n<h3>\u751f\u6210\u5668\u7684\u51e0\u79cd\u5f62\u5f0f<\/h3>\n<h4>\u751f\u6210\u5668\u51fd\u6570\u58f0\u660e<\/h4>\n<p><span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">generatorFunction<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u751f\u6210\u5668\u51fd\u6570\u8868\u8fbe\u5f0f<\/h4>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token function-variable function\">generatorExpr<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">yield<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u4f5c\u4e3a\u5bf9\u8c61\u65b9\u6cd5\u7684\u751f\u6210\u5668<\/h4>\n<p><span class=\"token keyword\">const<\/span> obj <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token operator\">*<\/span><span class=\"token function\">generatorMethod<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u65b9\u6cd5\u4e2d\u7684\u751f\u6210\u5668&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u4f5c\u4e3a\u7c7b\u65b9\u6cd5\u7684\u751f\u6210\u5668<\/h4>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MyClass<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token operator\">*<\/span><span class=\"token function\">generatorMethod<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7c7b\u65b9\u6cd5\u4e2d\u7684\u751f\u6210\u5668&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6807\u8bc6\u751f\u6210\u5668\u51fd\u6570\u7684\u661f\u53f7\u4e0d\u53d7\u4e24\u8fb9\u7a7a\u683c\u7684\u5f71\u54cd&#xff0c;\u5373&#xff1a;function* generatorFunction(){} \u3001function * generatorFunction(){} \u3001function *generatorFunction(){} &#xff0c;\u8fd9\u51e0\u79cd\u5199\u6cd5\u90fd\u662f\u7b49\u4ef7\u7684\u3002<\/p>\n<h3>yield \u5173\u952e\u5b57<\/h3>\n<p>yield \u5173\u952e\u5b57\u53ef\u4ee5\u8ba9\u751f\u6210\u5668\u505c\u6b62\u548c\u7ee7\u7eed\u6267\u884c&#xff0c;\u662f\u751f\u6210\u5668\u4e2d\u6700\u6709\u7528\u7684\u5730\u65b9\u3002\u751f\u6210\u5668\u5728\u9047\u5230 yield \u5173\u952e\u5b57\u4e4b\u524d\u90fd\u4f1a\u6b63\u5e38\u6267\u884c&#xff1b;\u9047\u5230\u540e&#xff0c;\u4f1a\u505c\u6b62\u6267\u884c&#xff0c;\u51fd\u6570\u4f5c\u7528\u57df\u7684\u72b6\u6001\u4f1a\u88ab\u4fdd\u7559\u3002\u505c\u6b62\u6267\u884c\u7684\u751f\u6210\u5668\u51fd\u6570&#xff0c;\u53ea\u80fd\u901a\u8fc7\u751f\u6210\u5668\u5bf9\u8c61\u8c03\u7528 next() \u6765\u6062\u590d\u6267\u884c\u3002<\/p>\n<h3>\u751f\u6210\u5668\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b&#xff0c;\u6765\u89c2\u5bdf\u751f\u6210\u5668\u7684\u6267\u884c\u6d41\u7a0b&#xff1a;<\/p>\n<p><span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u5f00\u59cb\u6267\u884c&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e00\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;a &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> a<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e8c\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;b &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> c <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e09\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;c &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#039;\u7ed3\u675f&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u751f\u6210\u5668\u5bf9\u8c61&#xff08;\u4e0d\u4f1a\u7acb\u5373\u6267\u884c&#xff09;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> gen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u4e00\u6b21\u8c03\u7528 next()&#xff0c;\u6267\u884c\u5230\u7b2c\u4e00\u4e2a yield<\/span><br \/>\n<span class=\"token keyword\">let<\/span> result <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u4e8c\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e00\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570A&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u4e09\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e8c\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570B&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u56db\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e09\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570C&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u518d\u6b21\u8c03\u7528 next()<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h3>\u751f\u6210\u5668\u7684\u53cc\u5411\u901a\u4fe1<\/h3>\n<p>\u4e0a\u8ff0\u751f\u6210\u5668\u7684\u6267\u884c\u6d41\u7a0b\u7684\u4f8b\u5b50\u4e2d&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 next() \u65b9\u6cd5\u7ed9\u751f\u6210\u5668\u51fd\u6570\u4f20\u53c2&#xff1b;\u540c\u65f6&#xff0c;\u6211\u4eec\u4e5f\u53ef\u4ee5\u63a5\u6536 yield \u5173\u952e\u5b57\u540e\u9762\u7684\u8fd4\u56de\u503c&#xff1a;<\/p>\n<p><span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u5f00\u59cb\u6267\u884c&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e00\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;a &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> a<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e8c\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;b &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">const<\/span> c <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#039;\u7b2c\u4e09\u6b21 yield&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;c &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#039;\u7ed3\u675f&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u751f\u6210\u5668\u5bf9\u8c61&#xff08;\u4e0d\u4f1a\u7acb\u5373\u6267\u884c&#xff09;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> gen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u4e00\u6b21\u8c03\u7528 next()&#xff0c;\u6267\u884c\u5230\u7b2c\u4e00\u4e2a yield<\/span><br \/>\n<span class=\"token keyword\">let<\/span> result <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;result &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: result &#061; \u7b2c\u4e00\u6b21 yield<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7b2c\u4e8c\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e00\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570A&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;result &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: result &#061; \u7b2c\u4e8c\u6b21 yield<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7b2c\u4e09\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e8c\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570B&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;result &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: result &#061; \u7b2c\u4e09\u6b21 yield<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7b2c\u56db\u6b21\u8c03\u7528 next()&#xff0c;\u4f20\u5165\u53c2\u6570\u7ed9\u7b2c\u4e09\u4e2a yield<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u53c2\u6570C&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;result &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: result &#061; \u7ed3\u675f<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u518d\u6b21\u8c03\u7528 next()<\/span><br \/>\nresult <span class=\"token operator\">&#061;<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;result &#061;&#039;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: result &#061; undefined<\/span><\/p>\n<h3>\u63d0\u524d\u7ec8\u6b62\u751f\u6210\u5668<\/h3>\n<p>\u4e0e\u8fed\u4ee3\u5668\u7c7b\u4f3c&#xff0c;\u751f\u6210\u5668\u4e5f\u652f\u6301\u63d0\u524d\u7ec8\u6b62\/\u5173\u95ed\u7684\u6982\u5ff5&#xff1a;return() \u548c throw() \u3002<\/p>\n<h4>return()<\/h4>\n<p>\u4f46\u4e0e\u8fed\u4ee3\u5668\u4e0d\u540c&#xff0c;\u6240\u6709\u7684\u751f\u6210\u5668\u5bf9\u8c61\u90fd\u6709 return() \u65b9\u6cd5&#xff0c;\u53ea\u8981\u901a\u8fc7\u5b83\u8fdb\u5165\u5173\u95ed\u72b6\u6001&#xff0c;\u5c31\u65e0\u6cd5\u6062\u590d\u4e86\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> gen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">return<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u7ec8\u6b62\u4e86&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: &#039;\u7ec8\u6b62\u4e86&#039;, done: true }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u7b2c\u4e00\u6b21 yield&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: undefined, done: true }<\/span><\/p>\n<h4>throw()<\/h4>\n<p>throw() \u65b9\u6cd5\u4f1a\u5728\u6682\u505c\u7684\u65f6\u5019&#xff0c;\u5c06\u4e00\u4e2a\u63d0\u4f9b\u7684\u9519\u8bef\u6ce8\u5165\u5230\u751f\u6210\u5668\u5bf9\u8c61\u4e2d\u3002\u5982\u679c\u9519\u8bef\u6ca1\u6709\u88ab\u5904\u7406&#xff0c;\u751f\u6210\u5668\u5c31\u4f1a\u5173\u95ed&#xff1a;<\/p>\n<p><span class=\"token keyword\">const<\/span> gen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">simpleGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">throw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Error<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u7b2c\u4e00\u6b21 throw&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u76f4\u63a5\u629b\u51fa\u9519\u8bef&#xff0c;\u8fdb\u5165 catch \u5757<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6355\u83b7\u5230\u9519\u8bef:&#039;<\/span><span class=\"token punctuation\">,<\/span> e<span class=\"token punctuation\">.<\/span>message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: \u6355\u83b7\u5230\u9519\u8bef: \u7b2c\u4e00\u6b21 throw<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u7ee7\u7eed\u6267\u884cgen&#xff1a;&#039;<\/span><span class=\"token punctuation\">,<\/span> gen<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: \u7ee7\u7eed\u6267\u884cgen&#xff1a;  { value: undefined, done: true }<\/span><\/p>\n<h2>\u751f\u6210\u5668\u4e0e\u8fed\u4ee3\u5668\u7684\u5173\u7cfb<\/h2>\n<p>\u751f\u6210\u5668\u4f5c\u4e3a\u8fed\u4ee3\u5668\u5de5\u5382&#xff0c;\u4f1a\u81ea\u52a8\u5b9e\u73b0\u8fed\u4ee3\u5668\u534f\u8bae&#xff0c;\u540c\u65f6\u751f\u6210\u5668\u5bf9\u8c61\u672c\u8eab\u4e5f\u662f\u53ef\u8fed\u4ee3\u7684&#xff1a;<\/p>\n<p><span class=\"token keyword\">function<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">createIterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">items<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> items<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">yield<\/span> items<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> iterator1 <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">createIterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator1<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 1, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator1<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 2, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator1<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: 3, done: false }<\/span><br \/>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>iterator1<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ { value: undefined, done: true }<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u751f\u6210\u5668\u5bf9\u8c61\u672c\u8eab\u4e5f\u662f\u53ef\u8fed\u4ee3\u7684<\/span><br \/>\n<span class=\"token keyword\">const<\/span> iterableGen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">createIterator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;a&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;b&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;c&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> item <span class=\"token keyword\">of<\/span> iterableGen<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ a, b, c<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u7528\u751f\u6210\u5668\u5b9e\u73b0 async\/await \u7684 Polyfill<\/h2>\n<p><span class=\"token keyword\">function<\/span> <span class=\"token function\">asyncGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">generatorFn<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\"><span class=\"token operator\">&#8230;<\/span>args<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> generator <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">generatorFn<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">apply<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> args<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">resolve<span class=\"token punctuation\">,<\/span> reject<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token keyword\">function<\/span> <span class=\"token function\">step<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">key<span class=\"token punctuation\">,<\/span> arg<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> result<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          result <span class=\"token operator\">&#061;<\/span> generator<span class=\"token punctuation\">[<\/span>key<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">(<\/span>arg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token function\">reject<\/span><span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n          <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> value<span class=\"token punctuation\">,<\/span> done <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&#061;<\/span> result<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>done<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n          <span class=\"token comment\">\/\/ \u5047\u8bbe value \u603b\u662f\u4e00\u4e2a Promise<\/span><br \/>\n          Promise<span class=\"token punctuation\">.<\/span><span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">then<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token parameter\">val<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token function\">step<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;next&#039;<\/span><span class=\"token punctuation\">,<\/span> val<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token parameter\">err<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token function\">step<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;throw&#039;<\/span><span class=\"token punctuation\">,<\/span> err<span class=\"token punctuation\">)<\/span><br \/>\n          <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><\/p>\n<p>      <span class=\"token function\">step<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;next&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u7ed3\u8bed<\/h2>\n<p>\u8fed\u4ee3\u5668\u548c\u751f\u6210\u5668\u662f JavaScript \u4e2d\u5f3a\u5927\u800c\u4f18\u96c5\u7684\u7279\u6027\u3002\u5b83\u4eec\u4e0d\u4ec5\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u8fed\u4ee3\u65b9\u5f0f&#xff0c;\u8fd8\u5f00\u542f\u4e86\u5f02\u6b65\u7f16\u7a0b\u548c\u60f0\u6027\u6c42\u503c\u7684\u65b0\u8303\u5f0f\u3002\u5bf9\u4e8e\u6587\u7ae0\u4e2d\u9519\u8bef\u7684\u5730\u65b9\u6216\u8005\u6709\u4efb\u4f55\u95ee\u9898&#xff0c;\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u8ba8\u8bba&#xff01;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668\u524d\u8a00&#xff1a;\u4ece for&#8230;of \u8bf4\u8d77\u7406\u89e3\u8fed\u4ee3\u548c\u8fed\u4ee3\u5668\u6a21\u5f0f\u4ec0\u4e48\u662f\u8fed\u4ee3&#xff1f;\u8fed\u4ee3\u5668\u6a21\u5f0f\u8fed\u4ee3\u5668\u6a21\u5f0f\u793a\u610f\u56fe\u53ef\u8fed\u4ee3\u534f\u8bae\u4e0e\u8fed\u4ee3\u5668\u534f\u8bae\u53ef\u8fed\u4ee3\u534f\u8bae&#xff08;Iterable Protocol&#xff09;\u8fed\u4ee3\u5668\u534f\u8bae&#xff08;Iterator Protocol&#xff09;\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668\u63d0\u524d\u7ec8\u6b62\u8fed\u4ee3\u5668\u666e\u901a\u5bf9\u8c61\u53ef\u8fed\u4ee3\u751f\u6210\u5668\u751f\u6210\u5668\u57fa\u7840\u751f\u6210\u5668\u7684\u51e0\u79cd\u5f62\u5f0f\u751f\u6210\u5668\u51fd\u6570\u58f0\u660e\u751f\u6210\u5668\u51fd\u6570\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u5bf9\u8c61\u65b9\u6cd5\u7684\u751f\u6210\u5668\u4f5c\u4e3a\u7c7b\u65b9\u6cd5\u7684\u751f\u6210\u5668yield <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[722,187,190],"topic":[],"class_list":["post-74985","post","type-post","status-publish","format-standard","hentry","category-server","tag-ecmascript","tag-javascript","tag-190"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/74985.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"JavaScript \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668\u524d\u8a00&#xff1a;\u4ece for...of \u8bf4\u8d77\u7406\u89e3\u8fed\u4ee3\u548c\u8fed\u4ee3\u5668\u6a21\u5f0f\u4ec0\u4e48\u662f\u8fed\u4ee3&#xff1f;\u8fed\u4ee3\u5668\u6a21\u5f0f\u8fed\u4ee3\u5668\u6a21\u5f0f\u793a\u610f\u56fe\u53ef\u8fed\u4ee3\u534f\u8bae\u4e0e\u8fed\u4ee3\u5668\u534f\u8bae\u53ef\u8fed\u4ee3\u534f\u8bae&#xff08;Iterable Protocol&#xff09;\u8fed\u4ee3\u5668\u534f\u8bae&#xff08;Iterator 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