{"id":3196,"date":"2024-11-10T15:45:10","date_gmt":"2024-11-10T07:45:10","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3196\/"},"modified":"2024-11-10T15:45:10","modified_gmt":"2024-11-10T07:45:10","slug":"js%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96class","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3196\/","title":{"rendered":"js\u5982\u4f55\u83b7\u53d6class"},"content":{"rendered":"<blockquote><p>\n  \u5728 javascript \u4e2d\uff0c\u83b7\u53d6\u5143\u7d20\u7684 class \u6709\u4e09\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 element.classlist.value \u83b7\u53d6 domtokenlist \u5bf9\u8c61\u6216\u5b57\u7b26\u4e32\u503c\u3002\u4f7f\u7528 element.classname \u76f4\u63a5\u83b7\u53d6\u5b57\u7b26\u4e32\u503c\u3002\u4f7f\u7528 element.getattribute(&#8216;class&#8217;) \u83b7\u53d6\u5b57\u7b26\u4e32\u503c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/08\/2024110806490222989.jpg\" class=\"aligncenter\" title=\"js\u5982\u4f55\u83b7\u53d6class\u63d2\u56fe\" alt=\"js\u5982\u4f55\u83b7\u53d6class\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6\u5143\u7d20\u7684 class<\/strong><\/p>\n<p>\u5728 JavaScript \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e09\u79cd\u65b9\u6cd5\u83b7\u53d6\u5143\u7d20\u7684 class\uff1a<\/p>\n<p><strong>1. element.classList.value<\/strong><\/p>\n<p>classList \u5c5e\u6027\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5143\u7d20\u6240\u6709 class \u540d\u79f0\u7684 DOMTokenList \u5bf9\u8c61\u3002value \u5c5e\u6027\u5219\u8fd4\u56de\u8be5\u5217\u8868\u4e2d\u6240\u6709 class \u540d\u79f0\u7684\u5b57\u7b26\u4e32\u5f62\u5f0f\u3002<\/p>\n<pre>const element = document.querySelector('p');\nconst classList = element.classList.value;\nconsole.log(classList); \/\/ \u8f93\u51fa\uff1a'my-class another-class'<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>2. element.className<\/strong><\/p>\n<p>className \u5c5e\u6027\u76f4\u63a5\u8fd4\u56de\u5143\u7d20\u7684 class \u540d\u79f0\u5b57\u7b26\u4e32\u3002<\/p>\n<pre>const element = document.querySelector('p');\nconst classList = element.className;\nconsole.log(classList); \/\/ \u8f93\u51fa\uff1a'my-class another-class'<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>3. element.getAttribute(&#8216;class&#8217;)<\/strong><\/p>\n<p>getAttribute(&#8216;class&#8217;) \u65b9\u6cd5\u8fd4\u56de\u5143\u7d20 class \u5c5e\u6027\u7684\u503c\u3002<\/p>\n<pre>const element = document.querySelector('p');\nconst classList = element.getAttribute('class');\nconsole.log(classList); \/\/ \u8f93\u51fa\uff1a'my-class another-class'<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8fd9\u4e09\u79cd\u65b9\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u90fd\u662f\u76f8\u540c\u7684\uff0c\u4f46\u5b83\u4eec\u7684\u4f7f\u7528\u573a\u666f\u53ef\u80fd\u6709\u6240\u4e0d\u540c\u3002classList \u5c5e\u6027\u63d0\u4f9b\u4e86\u5bf9\u5143\u7d20 class \u5217\u8868\u7684\u66f4\u591a\u63a7\u5236\uff0c\u800c className \u548c getAttribute(&#8216;class&#8217;) \u5219\u9002\u5408\u83b7\u53d6\u5143\u7d20\u7684 class \u540d\u79f0\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjs\u5982\u4f55\u83b7\u53d6class\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 javascript \u4e2d\uff0c\u83b7\u53d6\u5143\u7d20\u7684 class \u6709\u4e09\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528 element.classlist.value \u83b7\u53d6 domtokenlist \u5bf9\u8c61\u6216\u5b57\u7b26\u4e32\u503c\u3002\u4f7f\u7528 element.classname \u76f4\u63a5\u83b7\u53d6\u5b57\u7b26\u4e32\u503c\u3002\u4f7f\u7528 element.getattribute(&#8216;class&#8217;) \u83b7\u53d6\u5b57\u7b26\u4e32\u503c\u3002 \u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6\u5143\u7d20\u7684 class \u5728 JavaScript \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e09\u79cd\u65b9\u6cd5\u83b7\u53d6\u5143\u7d20\u7684 class\uff1a 1. element.classList.value classList \u5c5e\u6027\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5143\u7d20\u6240\u6709 class \u540d\u79f0\u7684 DOMTokenList \u5bf9\u8c61\u3002value \u5c5e\u6027\u5219\u8fd4\u56de\u8be5\u5217\u8868\u4e2d\u6240\u6709 class \u540d\u79f0\u7684\u5b57\u7b26\u4e32\u5f62\u5f0f\u3002 const element = document.querySelector(&#8216;p&#8217;); const classList = element.classList.value; console.log(classList); \/\/ \u8f93\u51fa\uff1a&#8217;my-class another-class&#8217; \u767b\u5f55\u540e\u590d\u5236 2. element.className className \u5c5e\u6027\u76f4\u63a5\u8fd4\u56de\u5143\u7d20\u7684 class \u540d\u79f0\u5b57\u7b26\u4e32\u3002 const element = document.querySelector(&#8216;p&#8217;); [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3196","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3196"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3196\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}