{"id":5601,"date":"2023-01-06T09:55:25","date_gmt":"2023-01-06T01:55:25","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5601"},"modified":"2023-01-06T09:55:25","modified_gmt":"2023-01-06T01:55:25","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8react-js%e6%b1%82%e5%8f%96%e5%ad%97%e4%b8%b2%e9%a6%96%e5%ad%97%e7%ac%a6%e4%bd%8d%e7%bd%ae","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%8f%96%e5%ad%97%e4%b8%b2%e9%a6%96%e5%ad%97%e7%ac%a6%e4%bd%8d%e7%bd%ae\/","title":{"rendered":"\u5b78\u7fd2\u5982\u4f55\u5229\u7528React.JS\u6c42\u53d6\u5b57\u4e32\u9996\u5b57\u7b26\u4f4d\u7f6e"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React.JS, indexOfFirst\"><\/p>\n<h2>\u5982\u4f55\u4f7f\u7528 React.JS \u6c42\u9996\u5b57\u7b26\u4f4d\u7f6e(indexOfFirst)<\/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\u8f15\u9b06\u5730\u69cb\u5efa\u9ad8\u6027\u80fd\u7684\u7db2\u9801\u61c9\u7528\u7a0b\u5f0f\u3002\u5728 React.JS \u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528 indexOfFirst \u51fd\u5f0f\u4f86\u6c42\u51fa\u5b57\u4e32\u4e2d\u9996\u5b57\u7b26\u7684\u4f4d\u7f6e\u3002<\/p>\n<p><!--more--><\/p>\n<p>indexOfFirst \u51fd\u5f0f\u53ef\u4ee5\u63a5\u53d7\u4e00\u500b\u5b57\u4e32\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u8a72\u5b57\u4e32\u4e2d\u9996\u5b57\u7b26\u7684\u4f4d\u7f6e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u6c42\u51fa\u5b57\u4e32 &#8220;Hello World&#8221; 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