{"id":5599,"date":"2023-01-06T09:54:45","date_gmt":"2023-01-06T01:54:45","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5599"},"modified":"2023-01-06T09:54:45","modified_gmt":"2023-01-06T01:54:45","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e6%b1%82%e5%ad%97%e4%b8%b2%e9%95%b7%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e6%b1%82%e5%ad%97%e4%b8%b2%e9%95%b7%e5%ba%a6\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u5229\u7528React.JS\u6c42\u5b57\u4e32\u9577\u5ea6"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React.JS, length\"><\/p>\n<h2>\u5229\u7528 React.JS \u6c42\u5b57\u4e32\u9577\u5ea6(length)<\/h2>\n<p>React.JS \u662f\u4e00\u500b\u7528\u65bc\u69cb\u5efa\u7528\u6236\u754c\u9762\u7684 JavaScript \u51fd\u5f0f\u5eab\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u5bb9\u6613\u5730\u69cb\u5efa\u9ad8\u54c1\u8cea\u7684\u7528\u6236\u754c\u9762\u3002\u5728 React.JS \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 JavaScript \u4f86\u6c42\u5b57\u4e32\u9577\u5ea6(length)\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u5728 React.JS \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>String.prototype.length<\/code> \u4f86\u6c42\u5b57\u4e32\u9577\u5ea6\u3002<code>String.prototype.length<\/code> \u662f\u4e00\u500b JavaScript \u5167\u5efa\u51fd\u5f0f\uff0c\u5b83\u53ef\u4ee5\u7528\u4f86\u6c42\u5b57\u4e32\u7684\u9577\u5ea6\u3002<\/p>\n<p>\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b57\u4e32 <code>str<\/code>\uff0c\u5b83\u7684\u503c\u70ba <code>\"Hello World\"<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>String.prototype.length<\/code> \u4f86\u6c42\u51fa\u5b83\u7684\u9577\u5ea6\uff1a<\/p>\n<pre class=\"brush: javascript\">\nlet str = \"Hello World\";\nlet length = str.length;\nconsole.log(length); 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