{"id":91871,"date":"2026-08-08T16:40:48","date_gmt":"2026-08-08T08:40:48","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91871.html"},"modified":"2026-08-08T16:40:48","modified_gmt":"2026-08-08T08:40:48","slug":"js%e9%94%ae%e7%9b%98%e4%ba%8b%e4%bb%b6%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91871.html","title":{"rendered":"JS\u952e\u76d8\u4e8b\u4ef6\u8be6\u89e3"},"content":{"rendered":"<h2>\u4e00\u3001\u5148\u7406\u89e3\u4ec0\u4e48\u53eb\u300c\u952e\u76d8\u4e8b\u4ef6\u300d<\/h2>\n<p>\u6211\u4eec\u5e73\u65f6\u6309\u952e&#xff1a;<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u6309\u4e0b A<br \/>\n\u2193<br \/>\n\u7535\u8111\u68c0\u6d4b\u5230\u952e\u76d8\u52a8\u4f5c<br \/>\n\u2193<br \/>\n\u6d4f\u89c8\u5668\u53d1\u73b0\u6709\u4eba\u6309\u952e<br \/>\n\u2193<br \/>\n\u89e6\u53d1\u4e00\u4e2a\u952e\u76d8\u4e8b\u4ef6<br \/>\n\u2193<br \/>\nJavaScript \u63a5\u6536\u5230\u8fd9\u4e2a\u4e8b\u4ef6<br \/>\n\u2193<br 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\/>\n<p>\u4e3a\u4ec0\u4e48&#xff1f;<\/p>\n<p>\u56e0\u4e3a&#xff1a;<\/p>\n<p>event.key<\/p>\n<p>\u8868\u793a&#xff1a;<\/p>\n<p>\u4f60\u6309\u4e0b\u7684\u952e\u662f\u4ec0\u4e48<\/p>\n<hr \/>\n<h2>\u516d\u3001event.key\u8be6\u7ec6\u7406\u89e3<\/h2>\n<p>\u6bd4\u5982&#xff1a;<\/p>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>\u952e\u76d8\u4e0a\u7684&#xff1a;<\/p>\n<p>1<\/p>\n<p>\u6d4f\u89c8\u5668\u7ed9&#xff1a;<\/p>\n<p>event.key<\/p>\n<p>\u503c&#xff1a;<\/p>\n<p>1<\/p>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>&#064;<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>&#064;<\/p>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>Shift<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>Shift<\/p>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>Enter<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>Enter<\/p>\n<hr \/>\n<h2>\u4e03\u3001event.code\u662f\u4ec0\u4e48&#xff1f;<\/h2>\n<p>\u518d\u770b&#xff1a;<\/p>\n<p>\u4ee3\u7801&#xff1a;<\/p>\n<p>document.addEventListener(&#034;keydown&#034;,function(event){<\/p>\n<p>    console.log(event.code);<\/p>\n<p>});<\/p>\n<p>\u6309&#xff1a;<\/p>\n<p>A<\/p>\n<p>\u63a7\u5236\u53f0&#xff1a;<\/p>\n<p>KeyA<\/p>\n<p>\u6309&#xff1a;<\/p>\n<p>B<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>KeyB<\/p>\n<p>\u6309&#xff1a;<\/p>\n<p>1<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>Digit1<\/p>\n<p>\u6309&#xff1a;<\/p>\n<p>\u7a7a\u683c<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>Space<\/p>\n<hr \/>\n<h3>key \u548c code\u533a\u522b<\/h3>\n<p>\u5047\u8bbe&#xff1a;<\/p>\n<p>\u952e\u76d8&#xff1a;<\/p>\n<p>A\u952e<\/p>\n<p>\u4f46\u662f\u4f60\u5207\u6362\u6210\u5927\u5199&#xff1a;<\/p>\n<p>\u6309&#xff1a;<\/p>\n<p>Shift&#043;A<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p>event.key<\/p>\n<p>\u8f93\u51fa&#xff1a;<\/p>\n<p>A<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>event.code<\/p>\n<p>\u4ecd\u7136&#xff1a;<\/p>\n<p>KeyA<\/p>\n<p>\u539f\u56e0&#xff1a;<\/p>\n<p>key&#xff1a;<\/p>\n<p>\u770b\u4f60\u8f93\u5165\u4ec0\u4e48\u3002<\/p>\n<p>code&#xff1a;<\/p>\n<p>\u770b\u4f60\u6309\u54ea\u4e2a\u7269\u7406\u952e\u3002<\/p>\n<hr 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\/>\n<h2>\u4e5d\u3001keyup\u662f\u4ec0\u4e48&#xff1f;<\/h2>\n<p>keydown&#xff1a;<\/p>\n<p>\u6309\u4e0b\u3002<\/p>\n<p>keyup&#xff1a;<\/p>\n<p>\u677e\u5f00\u3002<\/p>\n<p>\u4ee3\u7801&#xff1a;<\/p>\n<p>document.addEventListener(&#034;keyup&#034;,function(event){<\/p>\n<p>console.log(event.key);<\/p>\n<p>});<\/p>\n<p>\u73b0\u5728&#xff1a;<\/p>\n<p>\u6309\u4f4f A&#xff1a;<\/p>\n<p>\u4ec0\u4e48\u90fd\u6ca1\u6709<\/p>\n<p>\u677e\u5f00&#xff1a;<\/p>\n<p>\u63a7\u5236\u53f0&#xff1a;<\/p>\n<p>a<\/p>\n<hr \/>\n<p>\u8fc7\u7a0b&#xff1a;<\/p>\n<p>\u624b\u6307&#xff1a;<\/p>\n<p>\u6309\u4e0bA<br \/>\n |<br \/>\n |<br \/>\nkeydown\u89e6\u53d1<br \/>\n |<br \/>\n |<br \/>\n\u677e\u5f00A<br \/>\n |<br \/>\n |<br \/>\nkeyup\u89e6\u53d1<\/p>\n<hr 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\/>\nfunction(event){<\/p>\n<p>if(event.key&#061;&#061;&#061;&#034;Enter&#034;)<br \/>\n{<\/p>\n<p>console.log(&#034;\u63d0\u4ea4&#034;);<\/p>\n<p>}<\/p>\n<p>});<\/p>\n<hr \/>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>A<\/p>\n<p>\u63a7\u5236\u53f0&#xff1a;<\/p>\n<p>(\u6ca1\u6709\u8f93\u51fa)<\/p>\n<p>\u4f60\u6309&#xff1a;<\/p>\n<p>Enter<\/p>\n<p>\u63a7\u5236\u53f0&#xff1a;<\/p>\n<p>\u63d0\u4ea4<\/p>\n<p>\u4e3a\u4ec0\u4e48&#xff1f;<\/p>\n<p>\u56e0\u4e3a&#xff1a;<\/p>\n<p>event.key&#xff1a;<\/p>\n<p>A\u952e&#xff1a;<\/p>\n<p>&#034;a&#034;<\/p>\n<p>\u5224\u65ad&#xff1a;<\/p>\n<p>&#034;a&#034;&#061;&#061;&#061;&#034;Enter&#034;<\/p>\n<p>\u5047<\/p>\n<p>Enter&#xff1a;<\/p>\n<p>&#034;Enter&#034;<\/p>\n<p>\u5224\u65ad&#xff1a;<\/p>\n<p>&#034;Enter&#034;&#061;&#061;&#061;&#034;Enter&#034;<\/p>\n<p>\u771f<\/p>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p>console.log()<\/p>\n<hr \/>\n<h2>\u5341\u4e8c\u3001\u76d1\u542c\u65b9\u5411\u952e<\/h2>\n<p>\u4ee3\u7801&#xff1a;<\/p>\n<p>document.addEventListener(<br 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