{"id":68741,"date":"2026-01-30T16:16:51","date_gmt":"2026-01-30T08:16:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/68741.html"},"modified":"2026-01-30T16:16:51","modified_gmt":"2026-01-30T08:16:51","slug":"react%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%ef%bc%9a%e9%81%bf%e5%85%8d%e4%b8%8d%e5%bf%85%e8%a6%81%e6%b8%b2%e6%9f%93%ef%bc%8c%e6%8f%90%e5%8d%87%e7%bb%84%e4%bb%b6%e6%b8%b2%e6%9f%93%e6%95%88%e7%8e%87","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/68741.html","title":{"rendered":"React\u6027\u80fd\u4f18\u5316\uff1a\u907f\u514d\u4e0d\u5fc5\u8981\u6e32\u67d3\uff0c\u63d0\u5347\u7ec4\u4ef6\u6e32\u67d3\u6548\u7387"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130081649-697c68f1d7c71.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>&#x1f90d; \u524d\u7aef\u5f00\u53d1\u5de5\u7a0b\u5e08\u3001\u6280\u672f\u65e5\u66f4\u535a\u4e3b\u3001\u5df2\u8fc7CET6 &#x1f368; \u963f\u73ca\u548c\u5979\u7684\u732b_CSDN\u535a\u5ba2\u4e13\u5bb6\u300123\u5e74\u5ea6\u535a\u5ba2\u4e4b\u661f\u524d\u7aef\u9886\u57dfTOP1 &#x1f560; \u725b\u5ba2\u9ad8\u7ea7\u4e13\u9898\u4f5c\u8005\u3001\u6253\u9020\u4e13\u680f\u300a\u524d\u7aef\u9762\u8bd5\u5fc5\u5907\u300b \u3001\u300a2024\u9762\u8bd5\u9ad8\u9891\u624b\u6495\u9898\u300b\u3001\u300a\u524d\u7aef\u6c42\u804c\u7a81\u7834\u8ba1\u5212\u300b &#x1f35a; \u84dd\u6865\u4e91\u8bfe\u7b7e\u7ea6\u4f5c\u8005\u3001\u4e0a\u67b6\u8bfe\u7a0b\u300aVue.js \u548c Egg.js \u5f00\u53d1\u4f01\u4e1a\u7ea7\u5065\u5eb7\u7ba1\u7406\u9879\u76ee\u300b\u3001\u300a\u5e26\u4f60\u4ece\u5165\u95e8\u5230\u5b9e\u6218\u5168\u9762\u638c\u63e1 uni-app\u300b<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li><\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u4f7f\u7528PureComponent\u6216React.memo<\/li>\n<li>\u5408\u7406\u4f7f\u7528shouldComponentUpdate<\/li>\n<li>\u4f7f\u7528Immutable\u6570\u636e\u7ed3\u6784<\/li>\n<li>\u4f18\u5316\u5217\u8868\u6e32\u67d3<\/li>\n<li>\u5176\u4ed6\u4f18\u5316\u63aa\u65bd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><\/h2>\n<p>\u5728React\u5e94\u7528\u5f00\u53d1\u4e2d&#xff0c;\u968f\u7740\u5e94\u7528\u89c4\u6a21\u7684\u589e\u5927&#xff0c;\u7ec4\u4ef6\u6570\u91cf\u548c\u6570\u636e\u91cf\u7684\u589e\u52a0&#xff0c;\u6e32\u67d3\u6027\u80fd\u95ee\u9898\u53ef\u80fd\u9010\u6e10\u51f8\u663e\u3002\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u662f\u63d0\u9ad8React\u7ec4\u4ef6\u6e32\u67d3\u6548\u7387\u7684\u5173\u952e&#xff0c;\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u4f18\u5316\u65b9\u6cd5\u3002<\/p>\n<h4>\u4f7f\u7528PureComponent\u6216React.memo<\/h4>\n<ul>\n<li>PureComponent&#xff1a;React\u63d0\u4f9b\u4e86 PureComponent \u7c7b&#xff0c;\u5b83\u4f1a\u5bf9 props \u548c state \u8fdb\u884c\u6d45\u6bd4\u8f83\u3002\u53ea\u6709\u5f53 props \u6216 state \u7684\u503c\u53d1\u751f\u53d8\u5316\u65f6&#xff0c;\u624d\u4f1a\u89e6\u53d1\u7ec4\u4ef6\u91cd\u65b0\u6e32\u67d3\u3002\u4f8b\u5982&#xff0c;\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 PureCounter \u7ec4\u4ef6&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> React<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> PureComponent <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span><span class=\"token string\">&#039;react&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PureCounter<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">PureComponent<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  state <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token literal-property property\">count<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token function-variable function\">handleClick<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">prevState<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">count<\/span><span class=\"token operator\">:<\/span> prevState<span class=\"token punctuation\">.<\/span>count <span class=\"token operator\">&#043;<\/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 punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token function\">render<\/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;PureCounter rendered&#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><br \/>\n      <span class=\"token operator\">&lt;<\/span>div<span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Count<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>state<span class=\"token punctuation\">.<\/span>count<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>button onClick<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>handleClick<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span>Increment<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>button<span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>div<span class=\"token operator\">&gt;<\/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 keyword\">export<\/span> <span class=\"token keyword\">default<\/span> PureCounter<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;PureCounter \u7ec4\u4ef6\u7ee7\u627f\u81ea PureComponent\u3002\u5f53\u70b9\u51fb\u6309\u94ae\u66f4\u65b0 count \u72b6\u6001\u65f6&#xff0c;\u53ea\u6709 count \u7684\u503c\u53d1\u751f\u53d8\u5316\u624d\u4f1a\u89e6\u53d1\u91cd\u65b0\u6e32\u67d3&#xff0c;\u5176\u4ed6\u65e0\u5173\u7684 props \u6216 state \u53d8\u5316\u4e0d\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u3002<\/p>\n<ul>\n<li>React.memo&#xff1a;\u5bf9\u4e8e\u51fd\u6570\u5f0f\u7ec4\u4ef6&#xff0c;React.memo \u8d77\u5230\u7c7b\u4f3c\u7684\u4f5c\u7528\u3002\u5b83\u662f\u4e00\u4e2a\u9ad8\u9636\u7ec4\u4ef6&#xff0c;\u7528\u4e8e\u5bf9\u51fd\u6570\u5f0f\u7ec4\u4ef6\u8fdb\u884c memoization \u4f18\u5316\u3002\u4f8b\u5982&#xff0c;\u521b\u5efa\u4e00\u4e2a MemoizedButton \u51fd\u6570\u5f0f\u7ec4\u4ef6&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> React <span class=\"token keyword\">from<\/span><span class=\"token string\">&#039;react&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> MemoizedButton <span class=\"token operator\">&#061;<\/span> React<span class=\"token punctuation\">.<\/span><span class=\"token function\">memo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\"><span class=\"token punctuation\">{<\/span> label<span class=\"token punctuation\">,<\/span> onClick <span class=\"token punctuation\">}<\/span><\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/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;MemoizedButton rendered&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&lt;<\/span>button onClick<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span>onClick<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">{<\/span>label<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>button<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">export<\/span> <span class=\"token keyword\">default<\/span> MemoizedButton<span class=\"token punctuation\">;<\/span><\/p>\n<p>React.memo \u4f1a\u9ed8\u8ba4\u5bf9\u7ec4\u4ef6\u7684 props \u8fdb\u884c\u6d45\u6bd4\u8f83&#xff0c;\u53ea\u6709\u5f53 props \u53d1\u751f\u53d8\u5316\u65f6\u624d\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\u3002<\/p>\n<h4>\u5408\u7406\u4f7f\u7528shouldComponentUpdate<\/h4>\n<p>\u5bf9\u4e8e\u7c7b\u7ec4\u4ef6&#xff0c;\u5982\u679c PureComponent \u7684\u9ed8\u8ba4\u6d45\u6bd4\u8f83\u4e0d\u80fd\u6ee1\u8db3\u9700\u6c42&#xff0c;\u53ef\u4ee5\u624b\u52a8\u5b9e\u73b0 shouldComponentUpdate \u65b9\u6cd5\u6765\u81ea\u5b9a\u4e49\u66f4\u65b0\u903b\u8f91\u3002\u8be5\u65b9\u6cd5\u63a5\u6536 nextProps \u548c nextState \u4f5c\u4e3a\u53c2\u6570&#xff0c;\u901a\u8fc7\u6bd4\u8f83\u5f53\u524d\u7684 props \u548c state \u4e0e\u5373\u5c06\u66f4\u65b0\u7684 nextProps \u548c nextState&#xff0c;\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u6765\u51b3\u5b9a\u7ec4\u4ef6\u662f\u5426\u9700\u8981\u66f4\u65b0\u3002\u4f8b\u5982&#xff0c;\u5728\u4e00\u4e2a\u590d\u6742\u7684\u8868\u5355\u7ec4\u4ef6\u4e2d&#xff0c;\u53ef\u80fd\u53ea\u9700\u8981\u5728\u67d0\u4e9b\u7279\u5b9a\u7684 props \u53d8\u5316\u65f6\u624d\u66f4\u65b0&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">FormComponent<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">React<span class=\"token punctuation\">.<\/span>Component<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">shouldComponentUpdate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">nextProps<span class=\"token punctuation\">,<\/span> nextState<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4ec5\u5f53formData\u6216isSubmitted\u53d1\u751f\u53d8\u5316\u65f6\u624d\u66f4\u65b0\u7ec4\u4ef6<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>props<span class=\"token punctuation\">.<\/span>formData<span class=\"token operator\">!&#061;&#061;<\/span> nextProps<span class=\"token punctuation\">.<\/span>formData <span class=\"token operator\">||<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>props<span class=\"token punctuation\">.<\/span>isSubmitted<span class=\"token operator\">!&#061;&#061;<\/span> nextProps<span class=\"token punctuation\">.<\/span>isSubmitted<span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">render<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8868\u5355\u6e32\u67d3\u903b\u8f91<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u4f7f\u7528Immutable\u6570\u636e\u7ed3\u6784<\/h4>\n<p>Immutable\u6570\u636e\u7ed3\u6784\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u53ef\u53d8&#xff0c;\u4efb\u4f55\u5bf9\u5b83\u7684\u4fee\u6539\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61&#xff0c;\u800c\u4e0d\u662f\u4fee\u6539\u539f\u5bf9\u8c61\u3002\u8fd9\u4f7f\u5f97\u5728\u6bd4\u8f83\u6570\u636e\u662f\u5426\u53d8\u5316\u65f6\u66f4\u52a0\u9ad8\u6548&#xff0c;\u56e0\u4e3a\u53ef\u4ee5\u76f4\u63a5\u6bd4\u8f83\u5bf9\u8c61\u7684\u5f15\u7528\u3002React\u4e2d\u6709\u4e00\u4e9b\u5e93\u53ef\u4ee5\u5e2e\u52a9\u4f7f\u7528Immutable\u6570\u636e\u7ed3\u6784&#xff0c;\u5982 immutable-js\u3002\u4f8b\u5982&#xff0c;\u4f7f\u7528 immutable-js \u6765\u7ba1\u7406\u7ec4\u4ef6\u7684\u72b6\u6001&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> React <span class=\"token keyword\">from<\/span><span class=\"token string\">&#039;react&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Map <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;immutable&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ImmutableComponent<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">React<span class=\"token punctuation\">.<\/span>Component<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  state <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token literal-property property\">data<\/span><span class=\"token operator\">:<\/span> <span class=\"token function\">Map<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">name<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;John&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">age<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">30<\/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 function-variable function\">handleUpdate<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4f7f\u7528Immutable\u7684\u66f4\u65b0\u65b9\u5f0f<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">prevState<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token literal-property property\">data<\/span><span class=\"token operator\">:<\/span> prevState<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span><span class=\"token function\">set<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;age&#039;<\/span><span class=\"token punctuation\">,<\/span> prevState<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;age&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <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 punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token function\">render<\/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;ImmutableComponent rendered&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> data <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>state<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n      <span class=\"token operator\">&lt;<\/span>div<span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Name<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span>data<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;name&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Age<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span>data<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;age&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>button onClick<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>handleUpdate<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span>Update Age<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>button<span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>div<span class=\"token operator\">&gt;<\/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 keyword\">export<\/span> <span class=\"token keyword\">default<\/span> ImmutableComponent<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;state \u4e2d\u7684 data \u4f7f\u7528\u4e86 immutable-js \u7684 Map \u7c7b\u578b\u3002\u5f53\u66f4\u65b0 age \u65f6&#xff0c;\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 Map \u5bf9\u8c61&#xff0c;\u901a\u8fc7\u5f15\u7528\u6bd4\u8f83\u53ef\u4ee5\u51c6\u786e\u5224\u65ad\u6570\u636e\u662f\u5426\u53d1\u751f\u53d8\u5316&#xff0c;\u907f\u514d\u4e86\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u3002<\/p>\n<h4>\u4f18\u5316\u5217\u8868\u6e32\u67d3<\/h4>\n<ul>\n<li>\u4f7f\u7528key\u5c5e\u6027&#xff1a;\u5728\u6e32\u67d3\u5217\u8868\u65f6&#xff0c;\u4e3a\u6bcf\u4e2a\u5217\u8868\u9879\u63d0\u4f9b\u4e00\u4e2a\u552f\u4e00\u7684 key \u5c5e\u6027\u3002key \u6709\u52a9\u4e8eReact\u8bc6\u522b\u54ea\u4e9b\u5217\u8868\u9879\u53d1\u751f\u4e86\u53d8\u5316\u3001\u6dfb\u52a0\u6216\u5220\u9664&#xff0c;\u4ece\u800c\u66f4\u9ad8\u6548\u5730\u66f4\u65b0\u5217\u8868\u3002\u4f8b\u5982&#xff0c;\u6e32\u67d3\u4e00\u4e2a\u7528\u6237\u5217\u8868&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> React <span class=\"token keyword\">from<\/span><span class=\"token string\">&#039;react&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> users <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n  <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">id<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">name<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;Alice&#039;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">id<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">name<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;Bob&#039;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">id<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token literal-property property\">name<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;Charlie&#039;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token function-variable function\">UserList<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span>ul<span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token punctuation\">{<\/span>users<span class=\"token punctuation\">.<\/span><span class=\"token function\">map<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">user<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>li key<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span>user<span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">{<\/span>user<span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>li<span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>ul<span class=\"token operator\">&gt;<\/span><br \/>\n  <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 keyword\">export<\/span> <span class=\"token keyword\">default<\/span> UserList<span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u865a\u62df\u5217\u8868&#xff1a;\u5f53\u5217\u8868\u6570\u636e\u91cf\u975e\u5e38\u5927\u65f6&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u865a\u62df\u5217\u8868\u6280\u672f\u3002\u865a\u62df\u5217\u8868\u53ea\u6e32\u67d3\u53ef\u89c1\u533a\u57df\u7684\u5217\u8868\u9879&#xff0c;\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u6e32\u67d3\u6240\u6709\u9879\u3002\u5f53\u7528\u6237\u6eda\u52a8\u5217\u8868\u65f6&#xff0c;\u52a8\u6001\u52a0\u8f7d\u548c\u6e32\u67d3\u65b0\u7684\u53ef\u89c1\u9879\u3002\u6709\u4e00\u4e9bReact\u5e93\u53ef\u4ee5\u5e2e\u52a9\u5b9e\u73b0\u865a\u62df\u5217\u8868&#xff0c;\u5982 react-virtualized \u548c react-window\u3002<\/li>\n<\/ul>\n<h4>\u5176\u4ed6\u4f18\u5316\u63aa\u65bd<\/h4>\n<ul>\n<li>\u7ec4\u4ef6\u62c6\u5206\u4e0e\u61d2\u52a0\u8f7d&#xff1a;\u5c06\u5927\u578b\u7ec4\u4ef6\u62c6\u5206\u6210\u591a\u4e2a\u5c0f\u578b\u7ec4\u4ef6&#xff0c;\u5e76\u4e14\u4f7f\u7528\u61d2\u52a0\u8f7d\u6765\u5ef6\u8fdf\u52a0\u8f7d\u4e0d\u5e38\u7528\u7684\u7ec4\u4ef6\u3002\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u521d\u59cb\u6e32\u67d3\u7684\u5de5\u4f5c\u91cf&#xff0c;\u63d0\u9ad8\u9875\u9762\u7684\u52a0\u8f7d\u901f\u5ea6\u3002\u4f8b\u5982&#xff0c;\u4f7f\u7528 React.lazy \u548c Suspense \u6765\u5b9e\u73b0\u7ec4\u4ef6\u7684\u61d2\u52a0\u8f7d&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> React<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> lazy<span class=\"token punctuation\">,<\/span> Suspense <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span><span class=\"token string\">&#039;react&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> LazyComponent <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">lazy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token keyword\">import<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;.\/LazyComponent&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token function-variable function\">App<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span>div<span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token operator\">&lt;<\/span>Suspense fallback<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">&lt;<\/span>div<span class=\"token operator\">&gt;<\/span>Loading<span class=\"token operator\">&#8230;<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>div<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token operator\">&lt;<\/span>LazyComponent <span class=\"token operator\">\/<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n      <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>Suspense<span class=\"token operator\">&gt;<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>div<span class=\"token operator\">&gt;<\/span><br \/>\n  <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 keyword\">export<\/span> <span class=\"token keyword\">default<\/span> App<span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u907f\u514d\u5185\u8054\u51fd\u6570\u5b9a\u4e49&#xff1a;\u5728 render \u65b9\u6cd5\u4e2d\u907f\u514d\u5b9a\u4e49\u5185\u8054\u51fd\u6570&#xff0c;\u56e0\u4e3a\u6bcf\u6b21\u6e32\u67d3\u65f6\u90fd\u4f1a\u521b\u5efa\u65b0\u7684\u51fd\u6570\u5b9e\u4f8b&#xff0c;\u5bfc\u81f4\u7ec4\u4ef6\u7684 props \u770b\u8d77\u6765\u53d1\u751f\u4e86\u53d8\u5316&#xff0c;\u4ece\u800c\u53ef\u80fd\u89e6\u53d1\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u3002\u53ef\u4ee5\u5c06\u51fd\u6570\u5b9a\u4e49\u5728\u7ec4\u4ef6\u5916\u90e8\u6216\u8005\u4f7f\u7528 useCallback \u94a9\u5b50\u6765\u7f13\u5b58\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u8fd9\u4e9b\u65b9\u6cd5\u7684\u7efc\u5408\u8fd0\u7528&#xff0c;\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514dReact\u7ec4\u4ef6\u7684\u4e0d\u5fc5\u8981\u6e32\u67d3&#xff0c;\u63d0\u9ad8\u7ec4\u4ef6\u7684\u6e32\u67d3\u6548\u7387&#xff0c;\u4ece\u800c\u63d0\u5347\u6574\u4e2a\u5e94\u7528\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d&#xff0c;\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u6027\u80fd\u74f6\u9888&#xff0c;\u9009\u62e9\u5408\u9002\u7684\u4f18\u5316\u65b9\u6cd5&#xff0c;\u5e76\u8fdb\u884c\u4e0d\u65ad\u7684\u6d4b\u8bd5\u548c\u8c03\u4f18\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#x1f90d; \u524d\u7aef\u5f00\u53d1\u5de5\u7a0b\u5e08\u3001\u6280\u672f\u65e5\u66f4\u535a\u4e3b\u3001\u5df2\u8fc7CET6 &#x1f368; \u963f\u73ca\u548c\u5979\u7684\u732b_CSDN\u535a\u5ba2\u4e13\u5bb6\u300123\u5e74\u5ea6\u535a\u5ba2\u4e4b\u661f\u524d\u7aef\u9886\u57dfTOP1 &#x1f560; \u725b\u5ba2\u9ad8\u7ea7\u4e13\u9898\u4f5c\u8005\u3001\u6253\u9020\u4e13\u680f\u300a\u524d\u7aef\u9762\u8bd5\u5fc5\u5907\u300b \u3001\u300a2024\u9762\u8bd5\u9ad8\u9891\u624b\u6495\u9898\u300b\u3001\u300a\u524d\u7aef\u6c42\u804c\u7a81\u7834\u8ba1\u5212\u300b &#x1f35a; \u84dd\u6865\u4e91\u8bfe\u7b7e\u7ea6\u4f5c\u8005\u3001\u4e0a\u67b6\u8bfe\u7a0b\u300aVue.js \u548c Egg.js \u5f00\u53d1\u4f01\u4e1a\u7ea7\u5065\u5eb7\u7ba1\u7406\u9879\u76ee\u300b\u3001\u300a\u5e26\u4f60\u4ece\u5165\u95e8\u5230\u5b9e\u6218\u5168\u9762\u638c\u63e1 uni-app\u300b 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