{"id":5839,"date":"2023-01-06T15:13:38","date_gmt":"2023-01-06T07:13:38","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5839"},"modified":"2023-01-06T15:13:38","modified_gmt":"2023-01-06T07:13:38","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8react%e4%b8%ad%e4%bd%bf%e7%94%a8portals%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%a6%82%e4%bd%95%e5%9c%a8react%e4%b8%ad%e4%bd%bf%e7%94%a8portals%ef%bc%9f\/","title":{"rendered":"\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528Portals\uff1f"},"content":{"rendered":"

<\/p>\n

\u5982\u4f55\u5728 React \u4e2d\u4f7f\u7528 Portals\uff1f<\/h1>\n

React \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\u3002Portals \u662f React \u4e2d\u7684\u4e00\u500b\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u5143\u7d20\u6e32\u67d3\u5230 DOM \u7bc0\u9ede\u4e4b\u5916\u7684\u4f4d\u7f6e\u3002<\/p>\n

Portals \u53ef\u4ee5\u7528\u65bc\u89e3\u6c7a\u4e00\u4e9b React \u4e2d\u7684\u6311\u6230\uff0c\u4f8b\u5982\u5c0d\u8a71\u6846\u3001\u63d0\u793a\u6846\u548c\u5176\u4ed6\u5f48\u51fa\u5f0f\u5143\u7d20\u3002\u5b83\u5011\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u5143\u7d20\u6e32\u67d3\u5230\u4efb\u4f55\u4f4d\u7f6e\uff0c\u800c\u4e0d\u53d7 React \u61c9\u7528\u7a0b\u5e8f\u7684\u7d50\u69cb\u9650\u5236\u3002<\/p>\n

\u4f7f\u7528 Portals \u7684\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n

1. \u5275\u5efa Portal<\/h2>\n

\u9996\u5148\uff0c\u60a8\u9700\u8981\u5275\u5efa\u4e00\u500b Portal\uff0c\u5b83\u662f\u4e00\u500b React \u5143\u7d20\uff0c\u53ef\u4ee5\u6e32\u67d3\u5230 DOM \u7bc0\u9ede\u4e4b\u5916\u7684\u4f4d\u7f6e\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 ReactDOM.createPortal() \u65b9\u6cd5\u5275\u5efa Portal\uff0c\u5b83\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff1a\u8981\u6e32\u67d3\u7684\u5143\u7d20\u548c\u8981\u6e32\u67d3\u5230\u7684 DOM \u7bc0\u9ede\u3002<\/p>\n

\nconst portal = ReactDOM.createPortal(\n  
Hello, world!<\/div>,\n  document.getElementById('portal-root')\n);\n<\/pre>\n
2. \u6e32\u67d3 Portal<\/h2>\n
\u63a5\u4e0b\u4f86\uff0c\u60a8\u9700\u8981\u5c07 Portal \u6e32\u67d3\u5230\u60a8\u7684 React \u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u60a8\u53ef\u4ee5\u5c07 Portal \u6e32\u67d3\u5230\u4efb\u4f55 React \u5143\u7d20\u4e2d\uff0c\u4f8b\u5982<\/p>\n
<<\/p>\n
div> \u6216 \u3002<\/p>\n
\nconst App = () => (\n  
\n    
My App<\/h1>\n    {portal}\n  <\/div>\n);\n<\/pre>\n
3. \u66f4\u65b0 Portal<\/h2>\n
\u7576\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u7684\u72c0\u614b\u66f4\u6539\u6642\uff0cPortal \u4e5f\u6703\u66f4\u65b0\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 React \u7684\u751f\u547d\u9031\u671f\u65b9\u6cd5\u4f86\u66f4\u65b0 Portal\uff0c\u4f8b\u5982 componentDidUpdate() \u6216 useEffect()\u3002<\/p>\n
\nclass App extends React.Component {\n  componentDidUpdate() {\n    \/\/ Update the portal\n  }\n\n  render() {\n    return (\n      
\n        
My App<\/h1>\n        {portal}\n      <\/div>\n    );\n  }\n}\n<\/pre>\n
\u7e3d\u7d50<\/h2>\n
Portals \u662f React \u4e2d\u7684\u4e00\u500b\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u5143\u7d20\u6e32\u67d3\u5230 DOM \u7bc0\u9ede\u4e4b\u5916\u7684\u4f4d\u7f6e\u3002\u4f7f\u7528 Portals \u7684\u6b65\u9a5f\u5305\u62ec\uff1a\u5275\u5efa Portal\u3001\u6e32\u67d3 Portal \u548c\u66f4\u65b0 Portal\u3002Portals \u53ef\u4ee5\u8b93\u958b\u767c\u8005\u66f4\u8f15\u9b06\u5730\u69cb\u5efa\u5f48\u51fa\u5f0f\u5143\u7d20\uff0c\u800c\u4e0d\u53d7 React \u61c9\u7528\u7a0b\u5e8f\u7684\u7d50\u69cb\u9650\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1aPortals\u662fReact\u4e2d\u4e00\u7a2e\u7279\u6b8a\u7684API\uff0c\u53ef\u4ee5\u8b93\u4f60\u5c07\u5b50\u5143\u7d20\u6e32\u67d3\u5230\u7236\u5143\u7d20\u4e4b\u5916\u7684DOM\u7bc0\u9ede\u4e2d\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528Portals\uff0c\u4ee5\u53ca\u5b83\u7684\u512a\u9ede\u548c\u7f3a\u9ede\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-5839","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\/pcFK27-1wb","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5839","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=5839"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5839\/revisions"}],"predecessor-version":[{"id":5840,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5839\/revisions\/5840"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}