{"id":5963,"date":"2023-01-06T15:47:52","date_gmt":"2023-01-06T07:47:52","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5963"},"modified":"2023-01-06T15:47:52","modified_gmt":"2023-01-06T07:47:52","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react%e4%b8%ad%e7%9a%84useref%e9%80%b2%e8%a1%8cdom%e5%85%83%e7%b4%a0%e7%9a%84%e5%bc%95%e7%94%a8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8react%e4%b8%ad%e7%9a%84useref%e9%80%b2%e8%a1%8cdom%e5%85%83%e7%b4%a0%e7%9a%84%e5%bc%95%e7%94%a8\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528React\u4e2d\u7684useRef\u9032\u884cDOM\u5143\u7d20\u7684\u5f15\u7528"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React, useRef, DOM, \u5143\u7d20\u5f15\u7528\"><\/p>\n<h1>\u5728 React \u4e2d\u5982\u4f55\u4f7f\u7528 useRef \u8fdb\u884c DOM \u5143\u7d20\u7684\u5f15\u7528\uff1f<\/h1>\n<p>React \u63d0\u4f9b\u4e86\u4e00\u500b\u53eb\u505a <strong>useRef<\/strong> \u7684 Hook\uff0c\u5b83\u53ef\u4ee5\u8b93\u6211\u5011\u5728 React \u7684\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5f15\u7528 DOM \u5143\u7d20\u3002\u4f7f\u7528 useRef\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5b58\u53d6 DOM \u5143\u7d20\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528 class \u7d44\u4ef6\u3002<\/p>\n<h2>\u4f7f\u7528 useRef \u5f15\u7528 DOM \u5143\u7d20<\/h2>\n<p>\u8981\u4f7f\u7528 useRef \u5f15\u7528 DOM \u5143\u7d20\uff0c\u9996\u5148\u6211\u5011\u9700\u8981\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5ba3\u544a\u4e00\u500b useRef \u7684 Hook\uff1a<\/p>\n<pre class=\"brush: javascript\">\nconst myRef = useRef(null);\n<\/pre>\n<p>\u63a5\u8457\uff0c\u6211\u5011\u53ef\u4ee5\u5c07\u9019\u500b useRef Hook \u7d81\u5b9a\u5230\u4e00\u500b DOM \u5143\u7d20\u4e0a\uff1a<\/p>\n<pre class=\"brush: javascript\">\n<div ref={myRef}>\n  Hello World!\n<\/div>\n<\/pre>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 myRef \u9019\u500b Hook \u4f86\u5b58\u53d6\u9019\u500b div \u5143\u7d20\uff1a<\/p>\n<pre class=\"brush: javascript\">\nconsole.log(myRef.current);\n<\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u53ef\u4ee5\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5b58\u53d6 DOM \u5143\u7d20\u4e86\uff01<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728 React \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 useRef Hook \u4f86\u5f15\u7528 DOM \u5143\u7d20\u3002\u4f7f\u7528 useRef\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5b58\u53d6 DOM \u5143\u7d20\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528 class \u7d44\u4ef6\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u4f7f\u7528 useRef \u5f15\u7528 DOM \u5143\u7d20\u7684\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5ba3\u544a\u4e00\u500b useRef \u7684 Hook\uff1a\n<pre class=\"brush: javascript\">const myRef = useRef(null);<\/pre>\n<\/li>\n<li>\u5c07\u9019\u500b useRef Hook \u7d81\u5b9a\u5230\u4e00\u500b DOM \u5143\u7d20\u4e0a\uff1a\n<pre class=\"brush: javascript\"><div ref={myRef}>Hello World!<\/div><\/pre>\n<\/li>\n<li>\u4f7f\u7528 myRef \u9019\u500b Hook \u4f86\u5b58\u53d6\u9019\u500b div \u5143\u7d20\uff1a\n<pre class=\"brush: javascript\">console.log(myRef.current);<\/pre>\n<\/li>\n<\/ol>\n<p>\u4f7f\u7528 useRef Hook\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u51fd\u5f0f\u7d44\u4ef6\u4e2d\u5b58\u53d6 DOM \u5143\u7d20\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528 class \u7d44\u4ef6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39React\u4e2d\u4f7f\u7528useRef\u9032\u884cDOM\u5143\u7d20\u7684\u5f15\u7528\uff0c\u8a73\u7d30\u89e3\u91cb\u5982\u4f55\u4f7f\u7528useRef\u4f86\u53d6\u5f97DOM\u5143\u7d20\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528useRef\u4f86\u5b58\u5132\u53ca\u66f4\u65b0\u6578\u64da\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-5963","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\/pcFK27-1yb","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5963","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=5963"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5963\/revisions"}],"predecessor-version":[{"id":5964,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5963\/revisions\/5964"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}