{"id":3682,"date":"2024-11-10T16:20:48","date_gmt":"2024-11-10T08:20:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3682\/"},"modified":"2024-11-10T16:20:48","modified_gmt":"2024-11-10T08:20:48","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-react-18-%e7%b1%bb%e7%bb%84%e4%bb%b6%e5%9c%a8%e4%b8%a5%e6%a0%bc%e6%a8%a1%e5%bc%8f%e4%b8%8b%ef%bc%8c%e6%a8%a1%e6%8b%9f%e6%b8%b2%e6%9f%93%e7%9a%84-constructor-%e4%bc%9a","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3682\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f"},"content":{"rendered":"

\"\u4e3a\u4ec0\u4e48<\/p>\n

react 18 \u7684\u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u4f1a\u6267\u884c\u7684\u6a21\u62df\u6e32\u67d3 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentdidmount \u6267\u884c\uff1f<\/strong><\/p>\n

React 18 \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u5f15\u5165\u4e86\u4e00\u6b21\u6a21\u62df\u6e32\u67d3\uff0c\u5bfc\u81f4\u7c7b\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u8868\u73b0\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u6a21\u62df\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount<\/li>\n
  2. \u9996\u6b21\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount<\/li>\n<\/ol>\n

    \u8fd9\u5bfc\u81f4\u4e86\u7ec4\u4ef6\u5378\u8f7d\u65f6\u91cd\u7f6e\u4e86\u540e\u7eed\u6e32\u67d3\u7684\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u5f15\u53d1\u62a5\u9519\u3002<\/p>\n

    \u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n

    \u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n

      \n
    • \u5c06\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u653e\u5728 componentDidMount \u5185\u3002<\/li>\n
    • \n

      \u4f7f\u7528 React \u7684\u65b0\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff1a<\/p>\n

        \n
      • getDerivedStateFromProps<\/li>\n
      • getSnapshotBeforeUpdate<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

        \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5c06\u5728\u6bcf\u6b21\u6e32\u67d3\u524d\u8c03\u7528\uff0c\u786e\u4fdd\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5728\u6bcf\u6b21\u6e32\u67d3\u4e2d\u90fd\u6267\u884c\u3002<\/p>\n

        \u4ee5\u4e0a\u5c31\u662f React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

        react 18 \u7684\u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u4f1a\u6267\u884c\u7684\u6a21\u62df\u6e32\u67d3 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentdidmount \u6267\u884c\uff1f React 18 \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u5f15\u5165\u4e86\u4e00\u6b21\u6a21\u62df\u6e32\u67d3\uff0c\u5bfc\u81f4\u7c7b\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u8868\u73b0\u5982\u4e0b\uff1a \u6a21\u62df\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount \u9996\u6b21\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount \u8fd9\u5bfc\u81f4\u4e86\u7ec4\u4ef6\u5378\u8f7d\u65f6\u91cd\u7f6e\u4e86\u540e\u7eed\u6e32\u67d3\u7684\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u5f15\u53d1\u62a5\u9519\u3002 \u89e3\u51b3\u65b9\u6848\uff1a \u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a \u5c06\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u653e\u5728 componentDidMount \u5185\u3002 \u4f7f\u7528 React \u7684\u65b0\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff1a getDerivedStateFromProps getSnapshotBeforeUpdate \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5c06\u5728\u6bcf\u6b21\u6e32\u67d3\u524d\u8c03\u7528\uff0c\u786e\u4fdd\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5728\u6bcf\u6b21\u6e32\u67d3\u4e2d\u90fd\u6267\u884c\u3002 \u4ee5\u4e0a\u5c31\u662f React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3682","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3682"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3682\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}