{"id":5927,"date":"2023-01-06T15:37:32","date_gmt":"2023-01-06T07:37:32","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5927"},"modified":"2023-01-06T15:37:32","modified_gmt":"2023-01-06T07:37:32","slug":"%e4%ba%86%e8%a7%a3%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react-js%e4%b8%ad%e7%9a%84memo%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e4%ba%86%e8%a7%a3%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react-js%e4%b8%ad%e7%9a%84memo%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96\/","title":{"rendered":"\u4e86\u89e3\u5982\u4f55\u4f7f\u7528React.js\u4e2d\u7684Memo\u51fd\u6578\u9032\u884c\u6027\u80fd\u512a\u5316"},"content":{"rendered":"

<\/p>\n

\u5728 React \u4e2d\u5982\u4f55\u4f7f\u7528 memo \u8fdb\u884c\u6027\u80fd\u4f18\u5316\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\u61c9\u7528\u7a0b\u5e8f\u3002React \u63d0\u4f9b\u4e86\u4e00\u7a2e\u53eb\u505a memo \u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\uff0c\u4e26\u63d0\u9ad8\u6027\u80fd\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39 React \u4e2d\u7684 memo \u529f\u80fd\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u9032\u884c\u6027\u80fd\u512a\u5316\u3002<\/p>\n

\u4ec0\u9ebc\u662f memo\uff1f<\/h2>\n

memo \u662f React \u4e2d\u7684\u4e00\u7a2e\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\uff0c\u4e26\u63d0\u9ad8\u6027\u80fd\u3002memo \u53ef\u4ee5\u5c07\u7d44\u4ef6\u7684\u6e32\u67d3\u904e\u7a0b\u62c6\u5206\u70ba\u5169\u500b\u90e8\u5206\uff1a\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u548c\u7d44\u4ef6\u7684\u6bd4\u8f03\u51fd\u6578\u3002memo \u5c07\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u548c\u6bd4\u8f03\u51fd\u6578\u5206\u958b\uff0c\u4ee5\u4fbf\u53ea\u6709\u5728\u6bd4\u8f03\u51fd\u6578\u8fd4\u56de true \u6642\uff0c\u624d\u6703\u91cd\u65b0\u6e32\u67d3\u7d44\u4ef6\u3002<\/p>\n

memo \u7684\u512a\u9ede<\/h2>\n

memo \u7684\u6700\u5927\u512a\u9ede\u662f\u53ef\u4ee5\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u7531\u65bc memo \u53ef\u4ee5\u5c07\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u548c\u6bd4\u8f03\u51fd\u6578\u5206\u958b\uff0c\u56e0\u6b64\u53ea\u6709\u5728\u6bd4\u8f03\u51fd\u6578\u8fd4\u56de true \u6642\uff0c\u624d\u6703\u91cd\u65b0\u6e32\u67d3\u7d44\u4ef6\u3002\u9019\u610f\u5473\u8457\u53ea\u6709\u7576\u7d44\u4ef6\u7684 props \u6216 state \u767c\u751f\u8b8a\u5316\u6642\uff0c\u624d\u6703\u91cd\u65b0\u6e32\u67d3\u7d44\u4ef6\uff0c\u4ee5\u6b64\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 memo \u9032\u884c\u6027\u80fd\u512a\u5316\uff1f<\/h2>\n

\u4f7f\u7528 memo \u9032\u884c\u6027\u80fd\u512a\u5316\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u8981\u5c07\u7d44\u4ef6\u5305\u88dd\u5728 memo \u51fd\u6578\u4e2d\u5373\u53ef\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 memo \u9032\u884c\u6027\u80fd\u512a\u5316\u7684\u793a\u4f8b\uff1a<\/p>\n

\nconst MyComponent = React.memo(function MyComponent(props) {\n  \/* render using props *\/\n});\n<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5c07\u7d44\u4ef6 MyComponent \u5305\u88dd\u5728 memo \u51fd\u6578\u4e2d\uff0c\u4ee5\u4fbf\u53ea\u6709\u7576\u7d44\u4ef6\u7684 props \u6216 state \u767c\u751f\u8b8a\u5316\u6642\uff0c\u624d\u6703\u91cd\u65b0\u6e32\u67d3\u7d44\u4ef6\uff0c\u4ee5\u6b64\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
memo \u662f React \u4e2d\u7684\u4e00\u7a2e\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u69cb\u5efa\u61c9\u7528\u7a0b\u5e8f\uff0c\u4e26\u63d0\u9ad8\u6027\u80fd\u3002\u4f7f\u7528 memo \u9032\u884c\u6027\u80fd\u512a\u5316\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u8981\u5c07\u7d44\u4ef6\u5305\u88dd\u5728 memo \u51fd\u6578\u4e2d\u5373\u53ef\u3002memo \u7684\u6700\u5927\u512a\u9ede\u662f\u53ef\u4ee5\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u5c07\u7d44\u4ef6\u7684\u6e32\u67d3\u51fd\u6578\u548c\u6bd4\u8f03\u51fd\u6578\u5206\u958b\uff0c\u53ea\u6709\u7576\u7d44\u4ef6\u7684 props \u6216 state \u767c\u751f\u8b8a\u5316\u6642\uff0c\u624d\u6703\u91cd\u65b0\u6e32\u67d3\u7d44\u4ef6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1aReact.js\u4e2d\u7684Memo\u51fd\u6578\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u5b83\u53ef\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u91cd\u65b0\u6e32\u67d3\uff0c\u4e26\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528React.js\u4e2d\u7684Memo\u51fd\u6578\u9032\u884c\u6027\u80fd\u512a\u5316\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-5927","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\/pcFK27-1xB","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5927","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=5927"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5927\/revisions"}],"predecessor-version":[{"id":5928,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5927\/revisions\/5928"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5927"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}