{"id":5047,"date":"2020-12-02T08:51:29","date_gmt":"2020-12-02T00:51:29","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=5047"},"modified":"2020-12-02T08:51:29","modified_gmt":"2020-12-02T00:51:29","slug":"%e4%bd%bf%e7%94%a8-mutationobserver-%e8%b7%9f%e8%b8%aa-dom-%e7%9a%84%e5%8f%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/5047.html","title":{"rendered":"\u4f7f\u7528 MutationObserver \u8ddf\u8e2a DOM \u7684\u53d8\u5316"},"content":{"rendered":"\n<p>=Start=<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7f18\u7531\uff1a<\/h4>\n\n\n\n<p>\u771f\u7684\u662f\u9694\u884c\u5982\u9694\u5c71\uff0c\u867d\u7136\u90fd\u5c5e\u4e8eIT\u884c\u4e1a\uff0c\u4f46\u662f\u6211\u5bf9\u4e8e\u524d\u7aef\u7684\u5f88\u591a\u4e1c\u897f\u90fd\u4e0d\u4e86\u89e3\uff08\u5c24\u5176\u662f\u8fd1\u4e9b\u5e74\u524d\u7aef\u7684\u53d1\u5c55\u53d8\u5316\u65e5\u65b0\u6708\u5f02\uff09\uff0c\u597d\u540e\u6094\u4e4b\u524d\u6ca1\u6709\u597d\u597d\u5b66\u4e60\u524d\u7aef\u7684\u77e5\u8bc6\u2026\u2026<\/p>\n\n\n\n<p>\u8fd9\u91cc\u7b80\u5355\u8bb0\u5f55\u4e00\u4e0b\u524d\u6bb5\u65f6\u95f4\u4e86\u89e3\u5230\u7684MutationObserver\u8fd9\u4e2a\u77e5\u8bc6\u70b9\uff0c\u65b9\u4fbf\u4ee5\u540e\u8981\u7528\u7684\u65f6\u5019\u53c2\u8003\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b63\u6587\uff1a<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e00\u3001DOM\u662f\u4ec0\u4e48\uff1f<\/h5>\n\n\n\n<p><strong><span style=\"color:#a30003\" class=\"has-inline-color\">\u5f53\u7f51\u9875\u88ab\u52a0\u8f7d\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u521b\u5efa\u9875\u9762\u7684\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff08DOM, Document Object Model\uff09\u3002<\/span><\/strong>\u901a\u8fc7 HTML DOM\uff0c\u53ef\u8bbf\u95ee JavaScript HTML \u6587\u6863\u7684\u6240\u6709\u5143\u7d20\u3002\u901a\u8fc7\u53ef\u7f16\u7a0b\u7684\u5bf9\u8c61\u6a21\u578b\uff0cJavaScript \u83b7\u5f97\u4e86\u8db3\u591f\u7684\u80fd\u529b\u6765\u521b\u5efa\u52a8\u6001\u7684 HTML\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e8c\u3001\u5982\u4f55\u76d1\u542cDOM\u7684\u53d8\u5316\uff1f<\/h5>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8f6e\u8be2\uff08Polling\uff09<\/li><li>MutationEvents<\/li><li>CSS animations<\/li><li>MutationObserver<\/li><\/ul>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e09\u3001MutationObserver\u7684\u65b9\u6848<\/h5>\n\n\n\n<p><strong><span style=\"color:#a30003\" class=\"has-inline-color\">Mutation Observer API \u7528\u6765\u76d1\u89c6 DOM \u53d8\u52a8\u3002DOM \u7684\u4efb\u4f55\u53d8\u52a8\uff0c\u6bd4\u5982\u8282\u70b9\u7684\u589e\u51cf\u3001\u5c5e\u6027\u7684\u53d8\u52a8\u3001\u6587\u672c\u5185\u5bb9\u7684\u53d8\u52a8\uff0c\u8fd9\u4e2a API \u90fd\u53ef\u4ee5\u5f97\u5230\u901a\u77e5\u3002<\/span><\/strong><\/p>\n\n\n\n<p><span style=\"color:#a30003\" class=\"has-inline-color\">\u6982\u5ff5\u4e0a\uff0c\u5b83\u5f88\u63a5\u8fd1\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a DOM \u53d1\u751f\u53d8\u52a8\u5c31\u4f1a\u89e6\u53d1 Mutation Observer \u4e8b\u4ef6\u3002\u4f46\u662f\uff0c\u5b83\u4e0e\u4e8b\u4ef6\u6709\u4e00\u4e2a\u672c\u8d28\u4e0d\u540c\uff1a\u4e8b\u4ef6\u662f\u540c\u6b65\u89e6\u53d1\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cDOM \u7684\u53d8\u52a8\u7acb\u523b\u4f1a\u89e6\u53d1\u76f8\u5e94\u7684\u4e8b\u4ef6\uff1bMutation Observer \u5219\u662f\u5f02\u6b65\u89e6\u53d1\uff0cDOM \u7684\u53d8\u52a8\u5e76\u4e0d\u4f1a\u9a6c\u4e0a\u89e6\u53d1\uff0c\u800c\u662f\u8981\u7b49\u5230\u5f53\u524d\u6240\u6709 DOM \u64cd\u4f5c\u90fd\u7ed3\u675f\u624d\u89e6\u53d1\u3002<\/span><\/p>\n\n\n\n<p>\u8fd9\u6837\u8bbe\u8ba1\u662f\u4e3a\u4e86\u5e94\u4ed8 DOM \u53d8\u52a8\u9891\u7e41\u7684\u7279\u70b9\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5982\u679c\u6587\u6863\u4e2d\u8fde\u7eed\u63d2\u51651000\u4e2a \u5143\u7d20\uff0c\u5c31\u4f1a\u8fde\u7eed\u89e6\u53d11000\u4e2a\u63d2\u5165\u4e8b\u4ef6\uff0c\u6267\u884c\u6bcf\u4e2a\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\uff0c\u8fd9\u5f88\u53ef\u80fd\u9020\u6210\u6d4f\u89c8\u5668\u7684\u5361\u987f\uff1b\u800c Mutation Observer \u5b8c\u5168\u4e0d\u540c\uff0c\u53ea\u5728 1000 \u4e2a\u6bb5\u843d\u90fd\u63d2\u5165\u7ed3\u675f\u540e\u624d\u4f1a\u89e6\u53d1\uff0c\u800c\u4e14\u53ea\u89e6\u53d1\u4e00\u6b21\u3002<\/p>\n\n\n\n<p>Mutation Observer\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5b83\u7b49\u5f85\u6240\u6709\u811a\u672c\u4efb\u52a1\u5b8c\u6210\u540e\uff0c\u624d\u4f1a\u8fd0\u884c\uff0c\u5373<strong>\u91c7\u7528\u5f02\u6b65\u65b9\u5f0f<\/strong>\u3002<\/li><li>\u5b83<strong>\u628a DOM \u53d8\u52a8\u8bb0\u5f55\u5c01\u88c5\u6210\u4e00\u4e2a\u6570\u7ec4\u8fdb\u884c\u5904\u7406\uff0c\u800c\u4e0d\u662f\u4e00\u6761\u6761\u5730\u4e2a\u522b\u5904\u7406 DOM \u53d8\u52a8<\/strong>\u3002<\/li><li>\u5b83<strong>\u65e2\u53ef\u4ee5\u89c2\u5bdf\u53d1\u751f\u5728 DOM \u8282\u70b9\u7684\u6240\u6709\u53d8\u52a8\uff0c\u4e5f\u53ef\u4ee5\u89c2\u5bdf\u67d0\u4e00\u7c7b\u53d8\u52a8<\/strong>\u3002<\/li><\/ol>\n\n\n\n<h5 class=\"wp-block-heading\">\u56db\u3001\u4e00\u4e2a\u7b80\u5355\u7684\u6837\u4f8b<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;!DOCTYPE html>\n&lt;html>\n&lt;head>\n\t&lt;title>MutationObserver-test&lt;\/title>\n\t&lt;script type=\"text\/javascript\">\n\/\/ \u9009\u62e9\u9700\u8981\u89c2\u5bdf\u53d8\u52a8\u7684\u8282\u70b9\nvar targetNode = document.getElementById('uniq_id_name');\n\n\/\/ \u89c2\u5bdf\u5668\u7684\u914d\u7f6e\uff08\u9700\u8981\u89c2\u5bdf\u4ec0\u4e48\u53d8\u52a8\uff09\nconst config = { attributes: true, childList: true, subtree: true };\n\n\/\/ \u5f53\u89c2\u5bdf\u5230\u53d8\u52a8\u65f6\u6267\u884c\u7684\u56de\u8c03\u51fd\u6570\nconst callback = function(mutationsList, observer) {\n    \/\/ Use traditional 'for loops' for IE 11\n    for(let mutation of mutationsList) {\n        if (mutation.type === 'childList') {\n            console.log('A child node has been added or removed.');\n        }\n        else if (mutation.type === 'attributes') {\n            console.log('The ' + mutation.attributeName + ' attribute was modified.');\n        }\n        console.log(mutation);\n    }\n};\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u89c2\u5bdf\u5668\u5b9e\u4f8b\u5e76\u4f20\u5165\u56de\u8c03\u51fd\u6570\nconst observer = new MutationObserver(callback);\n\n\/\/ \u4ee5\u4e0a\u8ff0\u914d\u7f6e\u5f00\u59cb\u89c2\u5bdf\u76ee\u6807\u8282\u70b9\n\/\/ observer.observe(targetNode, config); \/* Uncaught TypeError: Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'. *\/\nobserver.observe(document, config); \/* \u7b2c\u4e00\u4e2a\u53c2\u6570\u8bd5\u4e86\u5f88\u591a\uff0c\u53d1\u73b0\u53ea\u80fd\u662f document \u624d\u4e0d\u4f1a\u62a5\u9519\u2026\u2026 *\/\n\n\/\/ \u4e4b\u540e\uff0c\u53ef\u505c\u6b62\u89c2\u5bdf\n\/\/ observer.disconnect();\n\t&lt;\/script>\n&lt;\/head>\n\n&lt;body>\n\t&lt;div id=\"uniq_id_name\">\n\t\tthis is original div's content.\n\t&lt;\/div>\n&lt;\/body>\n\n&lt;\/html><\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e94\u3001MutationObserver\u7684\u5b9e\u9645\u4f7f\u7528\u573a\u666f<\/h5>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4f60\u5e0c\u671b\u901a\u77e5 Web \u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee\u8005\uff0c\u4ed6\u5f53\u524d\u6240\u5728\u7684\u9875\u9762\u53d1\u751f\u4e86\u4e00\u4e9b\u66f4\u6539\u3002<\/li><li>\u4f60\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u65b0\u7684 JavaScript \u6846\u67b6\uff0c\u9700\u8981\u6839\u636e DOM \u7684\u53d8\u5316\u52a8\u6001\u52a0\u8f7d JavaScript \u6a21\u5757\u3002<\/li><li>\u4e5f\u8bb8\u4f60\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u6240\u89c1\u5373\u6240\u5f97(WYSIWYG) \u7f16\u8f91\u5668\uff0c\u8bd5\u56fe\u5b9e\u73b0\u64a4\u6d88\/\u91cd\u505a\u529f\u80fd\u3002\u901a\u8fc7\u5229\u7528 MutationObserver API\uff0c\u4f60\u53ef\u4ee5\u77e5\u9053\u5728\u4efb\u4f55\u7ed9\u5b9a\u7684\u70b9\u4e0a\u8fdb\u884c\u4e86\u54ea\u4e9b\u66f4\u6539\uff0c\u56e0\u6b64\u53ef\u4ee5\u8f7b\u677e\u5730\u64a4\u6d88\u8fd9\u4e9b\u66f4\u6539\u3002<\/li><li>\u8fd8\u6709\u7ed9\u9875\u9762\u6dfb\u52a0\u6c34\u5370\u7684\u65f6\u5019\uff0c\u9632\u6b62\u4e00\u4e9b\u4e0d\u6000\u597d\u610f\u7684\u4eba\u5bf9\u6c34\u5370\u7684\u5143\u7d20\u505a\u624b\u811a\u6765\u4fee\u6539\u6216\u9690\u85cf\u6c34\u5370\u3002<\/li><\/ul>\n\n\n\n<h5 class=\"wp-block-heading\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n\n\n\n<p>JavaScript HTML DOM<br><a href=\"https:\/\/www.runoob.com\/js\/js-htmldom.html\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.runoob.com\/js\/js-htmldom.html<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/API\/MutationObserver\">https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/API\/MutationObserver<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/wangdoc.com\/javascript\/dom\/mutationobserver.html\">https:\/\/wangdoc.com\/javascript\/dom\/mutationobserver.html<\/a><\/p>\n\n\n\n<p><strong><span style=\"color:#a30003\" class=\"has-inline-color\">JavaScript\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1a\u4f7f\u7528MutationObserver\u8ddf\u8e2aDOM\u7684\u53d8\u5316<\/span><\/strong><br><a rel=\"noreferrer noopener\" href=\"https:\/\/blog.fundebug.com\/2019\/01\/10\/understand-mutationobserver\/\" target=\"_blank\">https:\/\/blog.fundebug.com\/2019\/01\/10\/understand-mutationobserver\/<\/a><br><a href=\"https:\/\/blog.sessionstack.com\/how-javascript-works-tracking-changes-in-the-dom-using-mutationobserver-86adc7446401\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/blog.sessionstack.com\/how-javascript-works-tracking-changes-in-the-dom-using-mutationobserver-86adc7446401<\/a><\/p>\n\n\n\n<p>Mutation Observer \u7684\u4e09\u4e2a\u5b9e\u9645\u5e94\u7528<br><a href=\"https:\/\/www.zcfy.cc\/article\/three-real-world-uses-for-mutation-observer\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.zcfy.cc\/article\/three-real-world-uses-for-mutation-observer<\/a><br><a href=\"https:\/\/eager.io\/blog\/three-real-world-use-cases-for-mutation-observer\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/eager.io\/blog\/three-real-world-use-cases-for-mutation-observer\/<\/a><\/p>\n\n\n\n<p>canvas \u751f\u6210\u9875\u9762\u6c34\u5370\uff0cMutationObserver \u63a7\u5236\u8282\u70b9\u9632\u4fee\u6539<br><a href=\"https:\/\/www.liangzl.com\/get-article-detail-134311.html\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.liangzl.com\/get-article-detail-134311.html<\/a><\/p>\n\n\n\n<p>\u5236\u4f5c\u6c34\u5370<br><a href=\"https:\/\/www.dazhuanlan.com\/2020\/03\/15\/5e6d69a58de32\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.dazhuanlan.com\/2020\/03\/15\/5e6d69a58de32\/<\/a><br><a href=\"https:\/\/www.cnblogs.com\/jscode\/p\/3600060.html\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.cnblogs.com\/jscode\/p\/3600060.html<\/a><\/p>\n\n\n\n<p>\u524d\u7aef\u6c34\u5370\u521d\u63a2<br><a href=\"https:\/\/www.mdeditor.tw\/pl\/2RBr\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.mdeditor.tw\/pl\/2RBr<\/a><\/p>\n\n\n\n<p>\u9875\u9762\u6c34\u5370\u63d2\u4ef6\u5f00\u53d1<br><a href=\"http:\/\/www.wuhub.top\/the-development-of-page-watermark\/\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.wuhub.top\/the-development-of-page-watermark\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/mutation-observers?tab=Votes\">https:\/\/stackoverflow.com\/questions\/tagged\/mutation-observers?tab=Votes<\/a><\/p>\n\n\n\n<p>Detect changes in the DOM<br><a href=\"https:\/\/stackoverflow.com\/questions\/3219758\/detect-changes-in-the-dom\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/stackoverflow.com\/questions\/3219758\/detect-changes-in-the-dom<\/a><\/p>\n\n\n\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u771f\u7684\u662f\u9694\u884c\u5982\u9694\u5c71\uff0c\u867d\u7136\u90fd\u5c5e\u4e8eIT\u884c\u4e1a\uff0c\u4f46\u662f\u6211\u5bf9\u4e8e\u524d\u7aef\u7684\u5f88\u591a\u4e1c\u897f\u90fd\u4e0d\u4e86\u89e3\uff08\u5c24\u5176\u662f\u8fd1\u4e9b\u5e74\u524d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,12],"tags":[1699,62,1702,1701],"class_list":["post-5047","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","category-tools","tag-dom","tag-javascript","tag-mutationobserver","tag-watermark"],"views":2722,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/5047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=5047"}],"version-history":[{"count":2,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/5047\/revisions"}],"predecessor-version":[{"id":5050,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/5047\/revisions\/5050"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=5047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=5047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=5047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}