{"id":581,"date":"2025-12-07T10:04:55","date_gmt":"2025-12-07T02:04:55","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=581"},"modified":"2025-12-07T10:04:55","modified_gmt":"2025-12-07T02:04:55","slug":"javascript-%e4%b8%adclosest-%e6%96%b9%e6%b3%95%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2025\/12\/07\/javascript-%e4%b8%adclosest-%e6%96%b9%e6%b3%95%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e8%af%a6%e8%a7%a3\/","title":{"rendered":"JavaScript\u00a0\u4e2dclosest\u00a0\u65b9\u6cd5\u4f7f\u7528\u793a\u4f8b\u8be6\u89e3"},"content":{"rendered":"\n<p>\u4e0b\u9762\u7ed9\u4f60\u4e00\u4efd <strong>\u300aJavaScript \u4e2d <code>closest()<\/code> \u65b9\u6cd5\u4f7f\u7528\u793a\u4f8b\u8be6\u89e3\uff08\u8d85\u6e05\u6670\u7b14\u8bb0\u7248\uff09\u300b<\/strong>\uff0c\u5185\u5bb9\u9002\u5408\u4f5c\u4e3a\u5b66\u4e60\u7b14\u8bb0\u3001\u9762\u8bd5\u603b\u7ed3\u3001\u535a\u5ba2\u6587\u7ae0\u4f7f\u7528\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udccc \u4e00\u6587\u8be6\u89e3 JavaScript <code>closest()<\/code> \u65b9\u6cd5\uff08\u9644\u5927\u91cf\u793a\u4f8b\uff09<\/h1>\n\n\n\n<p><code>Element.closest()<\/code> \u662f DOM \u4e2d\u975e\u5e38\u5e38\u7528\u7684 API\uff0c\u7528\u4e8e<strong>\u5411\u4e0a\u67e5\u627e\u6700\u8fd1\u7684\u5339\u914d\u5143\u7d20<\/strong>\uff0c\u662f\u5904\u7406\u70b9\u51fb\u4e8b\u4ef6\u3001\u4e8b\u4ef6\u4ee3\u7406\u3001\u7ec4\u4ef6\u5c01\u88c5\u4e2d\u6700\u5f3a\u5927\u7684\u5de5\u5177\u4e4b\u4e00\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\udde9 1. <code>closest()<\/code> \u662f\u4ec0\u4e48\uff1f<\/h1>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><code>closest(selector)<\/code> \u4f1a\u4ece\u5f53\u524d\u5143\u7d20\u81ea\u8eab\u5f00\u59cb\uff0c\u6cbf\u7740 <strong>\u7236\u5143\u7d20\u94fe\u5411\u4e0a\u67e5\u627e<\/strong>\uff0c\u8fd4\u56de<strong>\u7b2c\u4e00\u4e2a\u5339\u914d\u9009\u62e9\u5668\u7684\u7956\u5148\u5143\u7d20<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u627e\u5230 \u2192 \u8fd4\u56de\u5bf9\u5e94\u5143\u7d20<\/li>\n\n\n\n<li>\u627e\u4e0d\u5230 \u2192 \u8fd4\u56de <code>null<\/code><\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udccc <strong>\u6ce8\u610f\uff1a\u5305\u542b\u201c\u81ea\u5df1\u201d<\/strong>\uff0c\u6240\u4ee5\u6bd4 <code>parentElement<\/code> \u66f4\u7075\u6d3b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udd27 2. \u57fa\u672c\u8bed\u6cd5<\/h1>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nelement.closest(selector)\n\n<\/pre><\/div>\n\n\n<p><strong>\u53c2\u6570\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>selector<\/code>\uff1aCSS \u9009\u62e9\u5668\u5b57\u7b26\u4e32\uff0c\u5982 <code>.class<\/code>\u3001<code>#id<\/code>\u3001<code>div<\/code>\u2026<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea 3. \u57fa\u7840\u4f7f\u7528\u793a\u4f8b<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u793a\u4f8b 1\uff1a\u67e5\u627e\u6700\u8fd1\u7684\u7236\u5143\u7d20<\/h2>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n&amp;lt;div class=&quot;card&quot;&gt;\n  &amp;lt;div class=&quot;content&quot;&gt;\n    &amp;lt;button id=&quot;btn&quot;&gt;Click Me&amp;lt;\/button&gt;\n  &amp;lt;\/div&gt;\n&amp;lt;\/div&gt;\n\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nconst btn = document.getElementById(&#039;btn&#039;);\n\nconst card = btn.closest(&#039;.card&#039;);  \nconsole.log(card); \/\/ \u627e\u5230\u6700\u8fd1\u7684 .card \u5bb9\u5668\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u793a\u4f8b 2\uff1a\u67e5\u627e\u81ea\u8eab<\/h2>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n&amp;lt;div class=&quot;item selected&quot;&gt;&amp;lt;\/div&gt;\n\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nconst item = document.querySelector(&#039;.item.selected&#039;);\n\nconsole.log(item.closest(&#039;.selected&#039;)); \n\/\/ \u8f93\u51fa\uff1a\u81ea\u8eab\uff08\u56e0\u4e3a\u81ea\u5df1\u5c31\u5339\u914d\uff09\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea 4. <code>closest()<\/code> \u5728\u4e8b\u4ef6\u4ee3\u7406\u4e2d\u7684\u5f3a\u5927\u7528\u9014<\/h1>\n\n\n\n<p>\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u5217\u8868\uff0c\u6bcf\u4e2a item \u90fd\u80fd\u70b9\u51fb\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n&amp;lt;ul id=&quot;list&quot;&gt;\n  &amp;lt;li class=&quot;item&quot;&gt;A&amp;lt;\/li&gt;\n  &amp;lt;li class=&quot;item&quot;&gt;B&amp;lt;\/li&gt;\n  &amp;lt;li class=&quot;item&quot;&gt;C&amp;lt;\/li&gt;\n&amp;lt;\/ul&gt;\n\n<\/pre><\/div>\n\n\n<p>\u4f60\u53ef\u4ee5\u4e8b\u4ef6\u4ee3\u7406\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\ndocument.getElementById(&quot;list&quot;).addEventListener(&quot;click&quot;, e =&gt; {\n  const item = e.target.closest(&quot;.item&quot;);\n\n  if (!item) return; \/\/ \u70b9\u51fb\u7684\u4e0d\u662f item\uff0c\u5ffd\u7565\n\n  console.log(&quot;You clicked:&quot;, item.textContent);\n});\n\n<\/pre><\/div>\n\n\n<p>\u2714 \u907f\u514d\u7ed9\u6bcf\u4e2a <code>&lt;li&gt;<\/code> \u5355\u72ec\u7ed1\u5b9a\u4e8b\u4ef6<br>\u2714 \u70b9\u51fb\u5185\u90e8\u5b50\u5143\u7d20\u4e5f\u80fd\u6b63\u786e\u83b7\u53d6 <code>&lt;li&gt;<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea 5. \u67e5\u627e\u6700\u8fd1\u7684\u7279\u5b9a\u7ed3\u6784\uff08\u7236 \u2192 \u7956\u7236 \u2192 \u6839\uff09<\/h1>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n&amp;lt;div class=&quot;modal&quot;&gt;\n  &amp;lt;div class=&quot;modal-body&quot;&gt;\n    &amp;lt;button class=&quot;close&quot;&gt;X&amp;lt;\/button&gt;\n  &amp;lt;\/div&gt;\n&amp;lt;\/div&gt;\n\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\ndocument.addEventListener(&quot;click&quot;, e =&gt; {\n  const modal = e.target.closest(&quot;.modal&quot;);\n  console.log(modal); \/\/ \u627e\u5230\u6700\u8fd1\u7684 modal \u5bb9\u5668\n});\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udccc 6. <code>closest()<\/code> vs <code>querySelector()<\/code> \u533a\u522b<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u67e5\u627e\u65b9\u5411<\/th><th>\u542b\u81ea\u8eab\uff1f<\/th><th>\u67e5\u627e\u5bf9\u8c61<\/th><\/tr><\/thead><tbody><tr><td><code>querySelector()<\/code><\/td><td>\u5411 <strong>\u5b50\u8282\u70b9<\/strong> \u67e5\u627e<\/td><td>\u274c<\/td><td>\u540e\u4ee3\u8282\u70b9<\/td><\/tr><tr><td><code>closest()<\/code><\/td><td>\u5411 <strong>\u7236\u8282\u70b9<\/strong> \u67e5\u627e<\/td><td>\u2714<\/td><td>\u7236\u7cfb\u8282\u70b9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\uded1 7. \u6d4f\u89c8\u5668\u517c\u5bb9\u6027<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6d4f\u89c8\u5668<\/th><th>\u662f\u5426\u652f\u6301<\/th><\/tr><\/thead><tbody><tr><td>Chrome<\/td><td>\u2714<\/td><\/tr><tr><td>Firefox<\/td><td>\u2714<\/td><\/tr><tr><td>Safari<\/td><td>\u2714<\/td><\/tr><tr><td>Edge<\/td><td>\u2714<\/td><\/tr><tr><td>IE<\/td><td>\u274c \u4e0d\u652f\u6301<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u26a0 \u5982\u679c\u8981\u652f\u6301 IE\uff0c\u9700\u8981 polyfill\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea 8. \u9ad8\u7ea7\u6848\u4f8b\uff1a\u70b9\u51fb\u5916\u90e8\u533a\u57df\u5173\u95ed\u5f39\u7a97<\/h1>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\ndocument.addEventListener(&quot;click&quot;, e =&gt; {\n  if (!e.target.closest(&quot;.dialog&quot;)) {\n    closeDialog();\n  }\n});\n\n<\/pre><\/div>\n\n\n<p>\u903b\u8f91\uff1a<br>\u53ea\u8981\u70b9\u51fb\u7684\u4e0d\u662f <code>.dialog<\/code> \u672c\u8eab\u6216\u5185\u90e8\u5185\u5bb9\uff0c\u5c31\u5173\u95ed\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea 9. \u7528 <code>closest()<\/code> \u5224\u65ad\u6309\u94ae\u662f\u5426\u5728\u7981\u7528\u533a\u57df<\/h1>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nbutton.addEventListener(&quot;click&quot;, e =&gt; {\n  if (e.target.closest(&quot;.disabled-area&quot;)) {\n    console.log(&quot;\u8fd9\u4e2a\u533a\u57df\u7981\u6b62\u70b9\u51fb&quot;);\n    return;\n  }\n});\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\udde0 10. \u603b\u7ed3\uff08\u975e\u5e38\u7b80\u6d01\uff09<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>closest()<\/code> \u5411\u4e0a\u641c\u7d22\u6700\u8fd1\u7684\u5339\u914d\u7236\u5143\u7d20\uff08\u542b\u81ea\u5df1\uff09\u3002<\/li>\n\n\n\n<li>\u9002\u7528\u4e8e\uff1a<br>\u2714 \u70b9\u51fb\u4e8b\u4ef6\u5b9a\u4f4d<br>\u2714 \u4e8b\u4ef6\u4ee3\u7406<br>\u2714 \u5224\u65ad\u662f\u5426\u70b9\u51fb\u67d0\u533a\u57df\u5185<br>\u2714 \u67e5\u627e\u7ec4\u4ef6\u5bb9\u5668<\/li>\n\n\n\n<li>\u4e0d\u652f\u6301 IE\uff08\u9700 polyfill\uff09\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0b\u9762\u7ed9\u4f60\u4e00\u4efd \u300aJavaScript \u4e2d closest() \u65b9\u6cd5\u4f7f\u7528\u793a\u4f8b\u8be6\u89e3\uff08&#8230; 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