{"id":316246,"date":"2024-05-21T17:17:06","date_gmt":"2024-05-21T09:17:06","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/316246.html"},"modified":"2024-05-21T17:17:30","modified_gmt":"2024-05-21T09:17:30","slug":"react-%e9%a1%b9%e7%9b%ae%e7%a8%8b%e5%ba%8f%e4%b8%ad-ref-%e5%9b%9e%e8%b0%83%e5%87%bd%e6%95%b0%e5%ae%9e%e7%8e%b0%e7%9a%84%e6%96%b9%e5%bc%8f%e6%9c%89%e5%93%aa%e4%ba%9b-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/316246.html","title":{"rendered":"React \u9879\u76ee\u7a0b\u5e8f\u4e2d ref \u56de\u8c03\u51fd\u6570\u5b9e\u73b0\u7684\u65b9\u5f0f\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"React<\/p>\n

\u5728React\u9879\u76ee\u4e2d\uff0cRef\u56de\u8c03\u51fd\u6570\u662f\u4e00\u79cd\u83b7\u53d6DOM\u8282\u70b9\u6216React\u7ec4\u4ef6\u5b9e\u4f8b\u7684\u65b9\u6cd5\uff0c\u4e3b\u8981\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u6765\u5b9e\u73b0\u3002\u5e38\u89c1\u7684\u5b9e\u73b0\u65b9\u5f0f\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32Refs\u3001\u4f7f\u7528\u56de\u8c03Refs\u4ee5\u53ca\u4f7f\u7528React.createRef()\u914d\u5408forwardRef<\/strong>\u3002\u5176\u4e2d\uff0c\u4f7f\u7528\u56de\u8c03Refs\u662f\u6700\u63a8\u8350\u7684\u5b9e\u73b0\u65b9\u5f0f<\/strong>\uff0c\u56e0\u4e3a\u5b83\u65e2\u63d0\u4f9b\u4e86\u65b9\u4fbf\u7075\u6d3b\u7684\u7528\u6cd5\uff0c\u53c8\u907f\u514d\u4e86React\u56e2\u961f\u5f03\u7528\u5b57\u7b26\u4e32Refs\u5e26\u6765\u7684\u9650\u5236\u3002<\/p>\n<\/p>\n

\u4f7f\u7528\u56de\u8c03Refs<\/strong> \u7684\u601d\u60f3\u662f\u5c06\u4e00\u4e2a\u51fd\u6570\u4f20\u9012\u7ed9React\u5143\u7d20\u7684ref<\/code>\u5c5e\u6027\u3002\u8fd9\u4e2a\u51fd\u6570\u5c06\u5728\u7ec4\u4ef6\u6302\u8f7d\u65f6\u63a5\u6536\u5230\u5e95\u5c42\u7684DOM\u5143\u7d20\u6216\u7ec4\u4ef6\u5b9e\u4f8b\u4f5c\u4e3a\u5176\u53c2\u6570\uff0c\u5e76\u4e14\u8fd9\u4e2a\u51fd\u6570\u53ef\u4ee5\u81ea\u7531\u5730\u5904\u7406\u8fd9\u4e2a\u5f15\u7528\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f18\u4e8e\u5b57\u7b26\u4e32Refs\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f9d\u8d56\u4e8eReact\u5185\u90e8\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u7ec4\u4ef6\u7684\u4efb\u4f55\u751f\u547d\u5468\u671f\u9636\u6bb5\u5b89\u5168\u5730\u8bbf\u95ee\u5230Refs\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u7b26\u4e32Refs<\/h3>\n<\/p>\n

\u4f7f\u7528\u5b57\u7b26\u4e32Refs\u662fReact\u65e9\u671f\u5b9e\u73b0Refs\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u4f60\u53ea\u7b80\u5355\u5730\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u5206\u914d\u7ed9DOM\u5143\u7d20\u7684ref\u5c5e\u6027\uff0c\u7136\u540eReact\u4f1a\u81ea\u52a8\u901a\u8fc7this.refs\u63d0\u4f9b\u5bf9\u8be5DOM\u5143\u7d20\u7684\u8bbf\u95ee\u3002<\/p>\n<\/p>\n

\u5b57\u7b26\u4e32Refs\u7684\u7f3a\u70b9<\/strong>\u4e3b\u8981\u5728\u4e8e\u5b83\u4eec\u7684\u4f7f\u7528\u53d7\u5230\u9650\u5236\uff0cReact\u56e2\u961f\u5df2\u7ecf\u4e0d\u63a8\u8350\u4f7f\u7528\u8be5\u65b9\u5f0f\uff0c\u5e76\u53ef\u80fd\u5728\u672a\u6765\u7684\u7248\u672c\u4e2d\u5b8c\u5168\u5e9f\u5f03\u5b83\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u56de\u8c03Refs<\/h3>\n<\/p>\n

\u56de\u8c03Refs<\/strong>\u7ed9\u4e88\u4e86\u5f00\u53d1\u8005\u66f4\u591a\u7684\u63a7\u5236\u6743\u548c\u7075\u6d3b\u6027\u3002\u901a\u8fc7\u4e3a\u5143\u7d20\u7684ref<\/code>\u5c5e\u6027\u63d0\u4f9b\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u6536\u5b9e\u9645\u7684DOM\u5143\u7d20\u6216\u7ec4\u4ef6\u5b9e\u4f8b\u4f5c\u4e3a\u53c2\u6570\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u5c06\u5176\u5b58\u50a8\u5230\u81ea\u5b9a\u4e49\u7684\u5c5e\u6027\u6216\u72b6\u6001\u4e2d\u3002<\/p>\n<\/p>\n

\u56de\u8c03Refs\u7684\u4f18\u70b9\u5305\u62ec\uff1a<\/p>\n<\/p>\n

    \n
  • \u517c\u5bb9\u6027\u5f3a<\/strong>\uff1a\u4e0d\u4f9d\u8d56\u4e8eReact\u7684\u5185\u90e8\u5b9e\u73b0\uff0c\u53ef\u4ee5\u5728\u4e0d\u540c\u7248\u672c\u7684React\u4e2d\u7a33\u5b9a\u4f7f\u7528\u3002<\/li>\n
  • \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u5019\u66f4\u65b0\u548c\u8bbf\u95eeRefs\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u5728\u7ec4\u4ef6\u6302\u8f7d\u6216\u66f4\u65b0\u65f6\u3002<\/li>\n
  • \u6613\u4e8e\u7406\u89e3<\/strong>\uff1a\u76f4\u89c2\u5730\u5c06DOM\u5143\u7d20\u6216\u7ec4\u4ef6\u5b9e\u4f8b\u76f4\u63a5\u4f20\u9012\u7ed9\u5f00\u53d1\u8005\u5904\u7406\uff0c\u4ee3\u7801\u53ef\u8bfb\u6027\u9ad8\u3002<\/li>\n<\/ul>\n

    \u4e09\u3001React.createRef()<\/h3>\n<\/p>\n

    \u5728React 16.3\u4e4b\u540e\uff0c\u5b98\u65b9\u5f15\u5165\u4e86React.createRef()<\/code>\u65b9\u6cd5\u7b80\u5316\u4e86Refs\u7684\u521b\u5efa\u8fc7\u7a0b\u3002\u901a\u8fc7React.createRef()<\/code>\u521b\u5efa\u4e00\u4e2aRef\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9\u7ec4\u4ef6\u5185\u7684\u4e00\u4e2a\u5c5e\u6027\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u5c5e\u6027\u63d0\u4f9b\u7ed9\u5143\u7d20\u7684ref<\/code>\u5c5e\u6027\u3002<\/p>\n<\/p>\n

    React.createRef()<\/code>\u7684\u4f7f\u7528\u7b80\u5316\u4e86\u4ee3\u7801\uff0c\u4f7f\u5f97\u5bf9Refs\u7684\u7ba1\u7406\u53d8\u5f97\u66f4\u52a0\u76f4\u89c2\u548c\u6613\u4e8e\u7406\u89e3\u3002<\/p>\n<\/p>\n

    \u56db\u3001forwardRef<\/h3>\n<\/p>\n

    forwardRef<\/code>\u662fReact\u63d0\u4f9b\u7684\u53e6\u4e00\u4e2a\u7528\u4e8e\u5f15\u7528\u4f20\u9012\u7684\u5de5\u5177\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u5728\u9ad8\u9636\u7ec4\u4ef6\uff08HOC\uff09\u4e2d\u8f6c\u53d1Refs\u5230\u5b50\u7ec4\u4ef6\u3002\u901a\u8fc7React.forwardRef()<\/code>\u53ef\u4ee5\u5c06Refs\u81ea\u52a8\u901a\u8fc7\u7ec4\u4ef6\u6811\u5411\u4e0b\u4f20\u9012\uff0c\u76f4\u81f3\u8fbe\u5230\u9700\u8981\u83b7\u53d6\u5b9e\u4f8b\u7684\u5b50\u7ec4\u4ef6\u3002<\/p>\n<\/p>\n

    forwardRef\u7684\u4f7f\u7528\u573a\u666f\u4e3b\u8981\u662f\u5728\u7ec4\u4ef6\u5e93\u6216\u9ad8\u9636\u7ec4\u4ef6\u4e2d\uff0c\u5f53\u9700\u8981\u76f4\u63a5\u8bbf\u95ee\u5230\u88ab\u5305\u88c5\u7ec4\u4ef6\u7684DOM\u8282\u70b9\u6216\u7ec4\u4ef6\u5b9e\u4f8b\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n

    \u9488\u5bf9React\u9879\u76ee\u4e2dRefs\u7684\u4f7f\u7528\uff0c\u4e0a\u8ff0\u63d0\u5230\u7684\u51e0\u79cd\u5b9e\u73b0\u65b9\u5f0f\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u4f46\u666e\u904d\u5efa\u8bae\u662f\u4f18\u5148\u8003\u8651\u4f7f\u7528\u56de\u8c03Refs\u3002\u901a\u8fc7\u6b63\u786e\u7684\u5b9e\u8df5\uff0c\u53ef\u4ee5\u4f7f\u5f97\u5bf9DOM\u7684\u5f15\u7528\u7ba1\u7406\u53d8\u5f97\u66f4\u4e3a\u7075\u6d3b\u548c\u5b89\u5168\u3002<\/p>\n<\/p>\n

    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
      \n
    • \n

      \u5982\u4f55\u5728React\u9879\u76ee\u4e2d\u4f7f\u7528ref\u56de\u8c03\u51fd\u6570\uff1f<\/strong>
      \n\u5728React\u9879\u76ee\u4e2d\uff0c\u5b9e\u73b0ref\u56de\u8c03\u51fd\u6570\u6709\u51e0\u79cd\u65b9\u5f0f\u3002\u7b2c\u4e00\u79cd\u65b9\u5f0f\u662f\u901a\u8fc7\u5728\u7c7b\u7ec4\u4ef6\u4e2d\u4f7f\u7528ref\u5c5e\u6027\u6765\u521b\u5efaref\u5bf9\u8c61\uff0c\u7136\u540e\u5c06\u8be5ref\u5bf9\u8c61\u4f20\u9012\u7ed9\u9700\u8981\u5f15\u7528\u7684\u5143\u7d20\u6216\u7ec4\u4ef6\u3002\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528React\u63d0\u4f9b\u7684createRef()\u65b9\u6cd5\u6765\u521b\u5efaref\u5bf9\u8c61\uff0c\u7136\u540e\u5c06\u8be5ref\u5bf9\u8c61\u4f20\u9012\u7ed9\u9700\u8981\u5f15\u7528\u7684\u5143\u7d20\u6216\u7ec4\u4ef6\u3002\u7b2c\u4e09\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528\u56de\u8c03\u51fd\u6570\u65b9\u5f0f\u521b\u5efaref\u5bf9\u8c61\u3002\u901a\u8fc7\u5728ref\u5c5e\u6027\u4e2d\u6307\u5b9a\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u5c06\u8be5\u51fd\u6570\u7ed1\u5b9a\u5230\u7ec4\u4ef6\u7684\u5b9e\u4f8b\u4e0a\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5728\u7ec4\u4ef6\u6e32\u67d3\u5b8c\u6210\u540e\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002<\/p>\n<\/li>\n

    • \n

      ref\u56de\u8c03\u51fd\u6570\u7684\u4f7f\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/strong>
      \nref\u56de\u8c03\u51fd\u6570\u5728React\u9879\u76ee\u4e2d\u6709\u8bb8\u591a\u4f7f\u7528\u573a\u666f\u3002\u5176\u4e2d\u4e00\u4e2a\u5e38\u89c1\u7684\u4f7f\u7528\u573a\u666f\u662f\u8bbf\u95eeDOM\u5143\u7d20\u3002\u901a\u8fc7\u5728ref\u56de\u8c03\u51fd\u6570\u4e2d\u4f7f\u7528nativeEvent\u5c5e\u6027\u53ef\u4ee5\u8bbf\u95eeDOM\u5143\u7d20\uff0c\u5e76\u8fdb\u884c\u4e00\u4e9b\u7279\u5b9a\u7684\u64cd\u4f5c\uff0c\u5982\u6539\u53d8\u6837\u5f0f\u3001\u6dfb\u52a0\u76d1\u542c\u4e8b\u4ef6\u7b49\u3002\u53e6\u4e00\u4e2a\u5e38\u89c1\u7684\u4f7f\u7528\u573a\u666f\u662f\u8bbf\u95ee\u5b50\u7ec4\u4ef6\u3002\u53ef\u4ee5\u4f7f\u7528ref\u56de\u8c03\u51fd\u6570\u6765\u83b7\u53d6\u5b50\u7ec4\u4ef6\u7684\u5b9e\u4f8b\uff0c\u4ece\u800c\u5b9e\u73b0\u4e0e\u5b50\u7ec4\u4ef6\u4e4b\u95f4\u7684\u901a\u4fe1\u548c\u4ea4\u4e92\u3002\u6b64\u5916\uff0cref\u56de\u8c03\u51fd\u6570\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5bf9\u7ec4\u4ef6\u8fdb\u884c\u52a8\u753b\u7684\u63a7\u5236\u3001\u5b9e\u73b0\u7126\u70b9\u7ba1\u7406\u7b49\u3002<\/p>\n<\/li>\n

    • \n

      ref\u56de\u8c03\u51fd\u6570\u548cref\u5bf9\u8c61\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/strong>
      \n\u5728React\u4e2d\uff0cref\u56de\u8c03\u51fd\u6570\u548cref\u5bf9\u8c61\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u6765\u5f15\u7528\u5143\u7d20\u6216\u7ec4\u4ef6\u3002ref\u5bf9\u8c61\u662fReact\u63d0\u4f9b\u7684\u4e00\u79cd\u5bf9\u8c61\uff0c\u901a\u8fc7createRef()\u65b9\u6cd5\u521b\u5efa\uff0c\u5e76\u901a\u8fc7ref\u5c5e\u6027\u5c06\u5176\u4f20\u9012\u7ed9\u9700\u8981\u5f15\u7528\u7684\u5143\u7d20\u6216\u7ec4\u4ef6\u3002\u901a\u8fc7ref\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7current\u5c5e\u6027\u6765\u8bbf\u95ee\u5f15\u7528\u7684\u5143\u7d20\u6216\u7ec4\u4ef6\u3002\u800cref\u56de\u8c03\u51fd\u6570\u662f\u4e00\u79cd\u51fd\u6570\uff0c\u5c06\u5176\u4f5c\u4e3aref\u5c5e\u6027\u7684\u503c\u8fdb\u884c\u7ed1\u5b9a\uff0c\u5e76\u5728\u7ec4\u4ef6\u6e32\u67d3\u5b8c\u6210\u540e\u88ab\u8c03\u7528\u3002\u901a\u8fc7ref\u56de\u8c03\u51fd\u6570\uff0c\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u90e8\u8bbf\u95ee\u5143\u7d20\u6216\u7ec4\u4ef6\uff0c\u5e76\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002\u603b\u7684\u6765\u8bf4\uff0cref\u5bf9\u8c61\u66f4\u9002\u5408\u5728\u7c7b\u7ec4\u4ef6\u4e2d\u4f7f\u7528\uff0c\u800cref\u56de\u8c03\u51fd\u6570\u66f4\u9002\u5408\u5728\u51fd\u6570\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5728React\u9879\u76ee\u4e2d\uff0cRef\u56de\u8c03\u51fd\u6570\u662f\u4e00\u79cd\u83b7\u53d6DOM\u8282\u70b9\u6216React\u7ec4\u4ef6\u5b9e\u4f8b\u7684\u65b9\u6cd5\uff0c\u4e3b\u8981\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u6765\u5b9e […]","protected":false},"author":3,"featured_media":316272,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/316246"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=316246"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/316246\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/316272"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=316246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=316246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=316246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}