{"id":52139,"date":"2024-12-03T13:19:23","date_gmt":"2024-12-03T05:19:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52139\/"},"modified":"2024-12-03T13:19:23","modified_gmt":"2024-12-03T05:19:23","slug":"%e7%bb%99-dom-%e5%85%83%e7%b4%a0%e7%bb%91%e5%ae%9a%e4%ba%8b%e4%bb%b6%e6%97%b6%e5%87%ba%e7%8e%b0cannot-call-method-addeventlistener-of-null%e9%94%99%e8%af%af%e5%a6%82%e4%bd%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52139\/","title":{"rendered":"\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300a\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

\"\u7ed9<\/p>\n

\u5728\u7ed9 dom \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u9519\uff1a\u65e0\u6cd5\u8c03\u7528\u4e8b\u4ef6\u76d1\u542c\u65b9\u6cd5<\/strong><\/p>\n

\u95ee\u9898\uff1a<\/p>\n

\u5728\u7ed9\u67d0\u4e2a html \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u5668\u65f6\uff0c\u9047\u5230\u4e86\u201ccannot call method ‘addeventlistener’ of null\u201d\u9519\u8bef\u3002\u5982\u4f55\u89e3\u51b3\u6b64\u9519\u8bef\uff1f<\/p>\n

\u7b54\u6848\uff1a<\/p>\n

\u6b64\u9519\u8bef\u901a\u5e38\u51fa\u73b0\u5728\u5c1d\u8bd5\u7ed9\u4e0d\u5b58\u5728\u7684 dom \u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u65f6\u3002\u8bf7\u786e\u4fdd\u8be5 dom \u5143\u7d20\u5df2\u6b63\u786e\u521d\u59cb\u5316\uff0c\u5e76\u4e14\u5728\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u4e4b\u524d\u5df2\u52a0\u8f7d\u3002<\/p>\n

\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

\/\/ \u5c1d\u8bd5\u4e3a\u4e0d\u5b58\u5728\u7684\u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\nconst nonExistingElement = document.getElementById('non-existing-element');\nnonExistingElement.addEventListener('click', () => {});\n\n\/\/ \u6b63\u786e\u7684\u793a\u4f8b - \u786e\u4fdd\u8be5\u5143\u7d20\u5b58\u5728\nconst existingElement = document.getElementById('existing-element');\nexistingElement.addEventListener('click', () => {});<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300a\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n
\n
<\/dt>\n
\n   \u6d4f\u89c8\u5668\u4e2d SVG \u7684\u5c3a\u5bf8\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f \u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300a\u7ed9 DOM \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u73b0\u201cCannot call method \\’addEventListener\\’ of null\u201d\u9519\u8bef\u5982\u4f55\u89e3\u51b3\uff1f\u300b\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~ \u5728\u7ed9 dom \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u65f6\u51fa\u9519\uff1a\u65e0\u6cd5\u8c03\u7528\u4e8b\u4ef6\u76d1\u542c\u65b9\u6cd5 \u95ee\u9898\uff1a \u5728\u7ed9\u67d0\u4e2a html \u5143\u7d20\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u5668\u65f6\uff0c\u9047\u5230\u4e86\u201ccannot call method ‘addeventlistener’ of null\u201d\u9519\u8bef\u3002\u5982\u4f55\u89e3\u51b3\u6b64\u9519\u8bef\uff1f \u7b54\u6848\uff1a \u6b64\u9519\u8bef\u901a\u5e38\u51fa\u73b0\u5728\u5c1d\u8bd5\u7ed9\u4e0d\u5b58\u5728\u7684 dom \u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u65f6\u3002\u8bf7\u786e\u4fdd\u8be5 dom \u5143\u7d20\u5df2\u6b63\u786e\u521d\u59cb\u5316\uff0c\u5e76\u4e14\u5728\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u4e4b\u524d\u5df2\u52a0\u8f7d\u3002 \u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff1a \/\/ \u5c1d\u8bd5\u4e3a\u4e0d\u5b58\u5728\u7684\u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668 const nonExistingElement = document.getElementById(‘non-existing-element’); nonExistingElement.addEventListener(‘click’, () => {}); \/\/ \u6b63\u786e\u7684\u793a\u4f8b – \u786e\u4fdd\u8be5\u5143\u7d20\u5b58\u5728 const existingElement = document.getElementById(‘existing-element’); existingElement.addEventListener(‘click’, () […]<\/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-52139","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52139","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=52139"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52139\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=52139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=52139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=52139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}