{"id":4700,"date":"2023-01-04T17:42:40","date_gmt":"2023-01-04T09:42:40","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4700"},"modified":"2023-01-04T17:42:40","modified_gmt":"2023-01-04T09:42:40","slug":"%e8%a7%a3%e6%b1%bareact-js%e4%b8%ad%e3%80%8c%e7%84%a1%e9%99%90%e5%be%aa%e7%92%b0%e6%9b%b4%e6%96%b0%e3%80%8d%e9%8c%af%e8%aa%a4%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e8%a7%a3%e6%b1%bareact-js%e4%b8%ad%e3%80%8c%e7%84%a1%e9%99%90%e5%be%aa%e7%92%b0%e6%9b%b4%e6%96%b0%e3%80%8d%e9%8c%af%e8%aa%a4%e7%9a%84%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u89e3\u6c7aReact.js\u4e2d\u300c\u7121\u9650\u5faa\u74b0\u66f4\u65b0\u300d\u932f\u8aa4\u7684\u65b9\u6cd5"},"content":{"rendered":"

<\/p>\n

\u89e3\u6c7a React.js “Error: You may have an infinite update loop in a component render function” \u5e38\u898b\u932f\u8aa4<\/h1>\n

React.js \u662f\u4e00\u500b\u7528\u65bc\u69cb\u5efa\u7528\u6236\u754c\u9762\u7684 JavaScript \u5eab\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u69cb\u5efa\u9ad8\u6027\u80fd\u7684\u7db2\u9801\u61c9\u7528\u7a0b\u5e8f\u3002\u7136\u800c\uff0c\u5728\u958b\u767c React.js \u61c9\u7528\u7a0b\u5e8f\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\uff1a\u201cError\uff1aYou may have an infinite update loop in a component render function\u201d\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u89e3\u6c7a\u6b64\u932f\u8aa4\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u7121\u9650\u66f4\u65b0\u5faa\u74b0\uff1f<\/h2>\n

\u7121\u9650\u66f4\u65b0\u5faa\u74b0\u662f\u6307\u5728 React.js \u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u67d0\u500b\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u6703\u4e0d\u65b7\u5730\u88ab\u8abf\u7528\uff0c\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7121\u6cd5\u6b63\u5e38\u904b\u884c\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u662f\u7531\u65bc\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u6216\u5c6c\u6027\uff08props\uff09\u88ab\u4e0d\u65b7\u5730\u66f4\u65b0\uff0c\u5c0e\u81f4\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\uff0c\u4ee5\u81f3\u65bc\u61c9\u7528\u7a0b\u5e8f\u7121\u6cd5\u6b63\u5e38\u904b\u884c\u3002<\/p>\n

\u5982\u4f55\u89e3\u6c7a\u7121\u9650\u66f4\u65b0\u5faa\u74b0\uff1f<\/h2>\n

\u8981\u89e3\u6c7a\u7121\u9650\u66f4\u65b0\u5faa\u74b0\uff0c\u958b\u767c\u8005\u9700\u8981\u5c0d\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u548c\u5c6c\u6027\uff08props\uff09\u9032\u884c\u6aa2\u67e5\uff0c\u78ba\u4fdd\u5b83\u5011\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u66f4\u65b0\u3002\u6b64\u5916\uff0c\u958b\u767c\u8005\u9084\u9700\u8981\u78ba\u4fdd\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\uff0c\u4ee5\u514d\u5c0e\u81f4\u7121\u9650\u66f4\u65b0\u5faa\u74b0\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u6aa2\u67e5\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u548c\u5c6c\u6027\uff08props\uff09\uff0c\u4ee5\u53ca\u5982\u4f55\u78ba\u4fdd\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\uff1a<\/p>\n

\nclass MyComponent extends React.Component {\n  constructor(props) {\n    super(props);\n    this.state = {\n      count: 0\n    };\n  }\n\n  componentDidUpdate(prevProps, prevState) {\n    \/\/ \u6aa2\u67e5\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u548c\u5c6c\u6027\uff08props\uff09\u662f\u5426\u88ab\u66f4\u65b0\n    if (prevState.count !== this.state.count || prevProps.value !== this.props.value) {\n      \/\/ \u72c0\u614b\uff08state\uff09\u6216\u5c6c\u6027\uff08props\uff09\u88ab\u66f4\u65b0\uff0c\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\n      \/\/ ...\n    }\n  }\n\n  render() {\n    \/\/ \u78ba\u4fdd\u6e32\u67d3\u51fd\u6578\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\n    if (this.state.count === 0) {\n      \/\/ \u6e32\u67d3\u7d44\u4ef6\n      \/\/ ...\n    }\n  }\n}\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5728 componentDidUpdate()<\/code> \u65b9\u6cd5\u4e2d\u6aa2\u67e5\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u548c\u5c6c\u6027\uff08props\uff09\u662f\u5426\u88ab\u66f4\u65b0\uff0c\u4e26\u5728 render()<\/code> \u65b9\u6cd5\u4e2d\u78ba\u4fdd\u6e32\u67d3\u51fd\u6578\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\u3002\u9019\u6a23\u4e00\u4f86\uff0c\u5c31\u53ef\u4ee5\u907f\u514d\u7121\u9650\u66f4\u65b0\u5faa\u74b0\u7684\u767c\u751f\u3002<\/p>\n
<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u8a73\u7d30\u4ecb\u7d39\u4e86\u5982\u4f55\u89e3\u6c7a React.js \u61c9\u7528\u7a0b\u5e8f\u4e2d\u7684\u201cError\uff1aYou may have an infinite update loop in a component render function\u201d\u5e38\u898b\u932f\u8aa4\u3002\u6211\u5011\u5efa\u8b70\u958b\u767c\u8005\u6aa2\u67e5\u7d44\u4ef6\u7684\u72c0\u614b\uff08state\uff09\u548c\u5c6c\u6027\uff08props\uff09\uff0c\u4e26\u78ba\u4fdd\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u4e0d\u6703\u88ab\u4e0d\u65b7\u5730\u8abf\u7528\uff0c\u4ee5\u907f\u514d\u7121\u9650\u66f4\u65b0\u5faa\u74b0\u7684\u767c\u751f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u89e3\u6c7aReact.js\u4e2d\u300c\u7121\u9650\u5faa\u74b0\u66f4\u65b0\u300d\u932f\u8aa4\uff0c\u4e86\u89e3\u5982\u4f55\u907f\u514d\u7121\u9650\u5faa\u74b0\u66f4\u65b0\u7684\u932f\u8aa4\uff0c\u4ee5\u53ca\u5982\u4f55\u6aa2\u67e5\u548c\u89e3\u6c7a\u9019\u7a2e\u932f\u8aa4\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[184,183],"tags":[182,181],"class_list":["post-4700","post","type-post","status-publish","format-standard","hentry","category-react","category-react-js","tag-react","tag-react-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1dO","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=4700"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4700\/revisions"}],"predecessor-version":[{"id":4701,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4700\/revisions\/4701"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}