{"id":11618,"date":"2025-04-06T20:57:59","date_gmt":"2025-04-06T12:57:59","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11618"},"modified":"2025-04-06T21:50:22","modified_gmt":"2025-04-06T13:50:22","slug":"js-editcontext-api","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2025\/04\/js-editcontext-api\/","title":{"rendered":"JS EditContext API \u7b80\u4ecb"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11618\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11618<\/a><br \/>\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u72ec\u7acb\u57df\u540d\u4e2a\u4eba\u7f51\u7ad9\u65e0\u9700\u6388\u6743\uff0c\u4f46\u9700\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/201901-css-var.jpg';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/editcontext-cover.jpg\" width=\"320\" height=\"201\" alt=\"EditContext API \u7b80\u4ecb\" class=\"alignright thumb clip size-medium\" \/><\/p>\n<h3>\u4e00\u3001EditContext API\u7684\u4f5c\u7528\u548c\u8bbe\u8ba1\u80cc\u666f<\/h3>\n<p>JS EditContext API\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u6bd4\u8f83\u9ad8\u7ea7\u7684Web\u8f93\u5165\u7f16\u8f91\u529f\u80fd\uff0c\u5305\u62ec\u63a7\u5236\u66f4\u7cbe\u7ec6\uff0c\u53cd\u5e94\u66f4\u7075\u654f\uff0c\u548c\u8f93\u5165\u6cd5\u914d\u5408\u66f4\u5b8c\u7f8e\u7b49\u3002<\/p>\n<p>\u76ee\u524d\u6211\u4eec\u5b9e\u73b0\u5185\u5bb9\u8f93\u5165\u4e0e\u7f16\u8f91\u591a\u662f\u501f\u7528<code>&lt;input&gt;<\/code> \u548c <code>&lt;textarea&gt;<\/code>\u5143\u7d20\uff0c\u5982\u679c\u6709\u5bcc\u6587\u672c\u7f16\u8f91\u5185\u5bb9\uff08\u5e38\u89c1\u7684\u6587\u7ae0\u53d1\u5e03\u7f16\u8f91\u5668\uff09\uff0c\u5219\u662f\u501f\u52a9<code>contenteditable<\/code>\u5c5e\u6027\uff0c\u6216\u8005\u4f7f\u7528CSS <code>-webkit-user-modify<\/code>\u5c5e\u6027\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u4ee5<code>contenteditable<\/code>\u5c5e\u6027\u4e3e\u4f8b\uff0c\u5176\u81ea\u5e26\u7684\u5f88\u591a\u5185\u7f6e\u884c\u4e3a\u5728\u9ad8\u7ea7\u5f00\u53d1\u7684\u65f6\u5019\u662f\u4e0d\u9700\u8981\u7684\u3002<\/p>\n<p>\u4e3e\u51e0\u4e2a\u4f8b\u5b50\uff0c\u6709\u5e8f\u6216\u65e0\u9700\u5217\u8868\u5728\u8d77\u59cb\u4f4d\u7f6e\u6309\u4e0bBackspace\u5220\u9664\uff0c\u9ed8\u8ba4\u884c\u4e3a\u662f\u5f53\u524d\u5217\u8868\u5220\u9664\uff0c\u540c\u65f6\u5185\u5bb9\u548c\u4e0a\u4e00\u4e2a\u5217\u8868\u5408\u5e76\uff0c\u4f46\u5f80\u5f80\u6211\u4eec\u5e0c\u671b\u7684\u662f\u53d6\u6d88\u5217\u8868\u72b6\u6001\u3002<\/p>\n<p>Tab\u952e\u4e4b\u540e\u4e8c\u7ea7\u7f29\u8fdb\u800c\u4e0d\u662f\u521b\u5efaTab\u7a7a\u683c\u3002<\/p>\n<p>\u94fe\u63a5\u6587\u672c\u540e\u9762\u6362\u884c\u6216\u8f93\u5165\u7a7a\u683c\uff0c\u81ea\u52a8\u8d85\u94fe\u63a5\u3002<\/p>\n<p>\u6362\u884c\u4f7f\u7528<code>&lt;p&gt;<\/code>\u800c\u4e0d\u662fdiv\u3002<\/p>\n<p>\u5185\u5bb9<code>inline-block<\/code>\u6216<code>inline-flex<\/code>\u4e4b\u540e\u9700\u8981\u4f5c\u4e3a\u6574\u4f53\uff0c\u5149\u6807\u53ef\u4ee5\u5b9a\u4f4d\u5728\u540e\u9762\uff0c\u4f46\u662f\u4e0d\u80fd\u5728\u91cc\u9762\u3002<\/p>\n<p>\u8fd9\u4e9b\u5185\u7f6e\u884c\u4e3a\u5747\u65e0\u6cd5\u6ee1\u8db3\u3002<\/p>\n<p>\u4ee5\u53ca\uff0c\u4e00\u4e9b\u5f00\u53d1\u573a\u666f\u9700\u8981\u4f7f\u7528Canvas\u505a\u56fe\u5f62\u7f16\u8f91\u5668\uff0c\u4f8b\u5982\uff0cB\u7ad9\u6216\u8005\u6296\u97f3\u89c6\u9891\u4e0a\u4f20\u65f6\u5019\u5c01\u9762\u7684DIY\uff0c\u5176\u4e2d\u5c31\u6709canvas\u4e2d\u5b9e\u73b0\u6587\u672c\u8f93\u5165\u3002<\/p>\n<p>\u53c8\u6bd4\u5982\u9700\u8981\u534f\u8c03\u5f00\u53d1\u7684\u5728\u7ebf\u6587\u6863\u5f00\u53d1\u7b49\u3002<\/p>\n<p>\u603b\u800c\u8a00\u4e4b\uff0c\u73b0\u6709\u7684Web\u7f16\u8f91\u80fd\u529b\u53ea\u80fd\u5b9e\u73b0\u4e00\u4e9b\u4f4e\u5c42\u7ea7\u7684\u7f16\u8f91\u529f\u80fd\uff0c\u60f3\u8981\u9ad8\u7ea7\u5b9a\u5236\uff0c\u9700\u8981\u5f88\u5927\u7684\u5b9e\u73b0\u6210\u672c\uff0c\u57fa\u4e8e\u8fd9\u4e2a\u80cc\u666f\uff0c\u5c31\u8bbe\u8ba1\u4e86EditContext API\uff0c\u8fd9\u4e2aAPI\u662fMicrosoft Edge \u56e2\u961f\u63a8\u52a8\u652f\u6301\u7684\uff0c\u53ef\u4ee5\u5c06\u6587\u672c\u8f93\u5165\u4e0e HTML DOM \u89c6\u56fe\u5206\u79bb\uff0c\u4ece\u800c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u5f00\u53d1\u4f53\u9a8c\u3002<\/p>\n<h3>\u4e8c\u3001EditContext\u7684\u8bed\u6cd5\u548c\u4f7f\u7528<\/h3>\n<p>EditContext\u5bf9\u8c61\u652f\u63014\u4e2a\u5c5e\u6027\uff0c7\u4e2a\u65b9\u6cd5\u548c5\u79cd\u4e8b\u4ef6\uff0c\u5177\u4f53\u53c2\u89c1<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/EditContext\" rel=\"noopener\" target=\"_blank\">MDN\u6587\u6863<\/a>\uff0c\u6211\u8fd9\u91cc\u4e0d\u505a\u4ecb\u7ecd\uff0c\u6211\u81ea\u5df1\u4e5f\u61d2\u5f97\u53bb\u5b66\u4e60\u4e86\uff0c\u4f30\u8ba1\u4ee5\u540e\u4e5f\u7528\u4e0d\u5230\uff0c\u56e0\u4e3aSafari\u8fd8\u6ca1\u6709\u770b\u5230\u652f\u6301\u7684\u8ff9\u8c61\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-04-06_203343.png\" width=\"704\" height=\"308\" alt=\"EditContext\u5c5e\u6027\u548c\u65b9\u6cd5\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u8fd9\u91cc\uff0c\u901a\u8fc7\u4e00\u4e2a\u6848\u4f8b\u5c55\u793aEditContext\u7684\u4f7f\u7528\uff0c\u7ed9\u5b9a\u4e00\u4e2acanvas\u5143\u7d20\uff1a<\/p>\n<pre>&lt;canvas id=\"editor\"&gt;&lt;\/canvas&gt;<\/pre>\n<p>\u5219\u4e0b\u9762\u8fd9\u6bb5JavaScript\u4ee3\u7801\u53ef\u4ee5\u76d1\u542ccanvas\u753b\u5e03\u4e0a\u8f93\u5165\u7684\u5185\u5bb9\uff08\u70b9\u51fbcanvas\u5143\u7d20\uff0c\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\uff09\uff1a<\/p>\n<pre>const editContext = new EditContext();\r\nconst editorElement = document.getElementById(\"editor\");\r\neditorElement.editContext = editContext;\r\n\r\neditContext.addEventListener('textupdate', (event) => {\r\n    const newText = event.text;\r\n    \/\/ \u5904\u7406\u65b0\u8f93\u5165\u7684\u6587\u672c\r\n    console.log('\u8f93\u5165\u7684\u6587\u672c\u662f\uff1a', newText);\r\n});<\/pre>\n<p>\u4e0b\u56fe\u662f\u6211\u5f00\u542f\u8f93\u5165\u6cd5\u4e4b\u540e\u7684console\u8f93\u51fa\u6548\u679c\u622a\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-04-06_195924.png\" width=\"325\" height=\"248\" alt=\"\u8f93\u5165\u6cd5\u4e0e\u63d0\u793a\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u6b64\u65f6\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8bc6\u522b\u8f93\u5165\u7684\u5185\u5bb9\uff0c\u5728canvas\u4e0a\u8fdb\u884c\u7ed8\u5236\uff0c\u5b9e\u73b0canvas\u753b\u5e03\u4e0a\u7684\u6587\u5b57\u8f93\u5165\u6548\u679c\u3002<\/p>\n<h4>\u517c\u5bb9\u6027<\/h4>\n<p>EditContext API\u76ee\u524d\u517c\u5bb9\u6027\u4e0d\u7b97\u597d\uff0c\u6240\u4ee5\u6587\u672c\u7684\u6807\u9898\u624d\u662f\u7b80\u4ecb\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-04-06_202729.png\" width=\"631\" height=\"225\" alt=\"EditContext API\u7684\u517c\u5bb9\u6027\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u5927\u5bb6\u76ee\u524d\u4e86\u89e3\u4e0b\u5c31\u597d\u4e86\u3002<\/p>\n<h3>\u4e09\u3001\u5c31\u8bf4\u8fd9\u4e48\u591a<\/h3>\n<p>\u597d\u5427\uff0c\u5173\u4e8e\u8fd9\u4e2aAPI\u5c31\u8bf4\u8fd9\u4e48\u591a\uff0c\u6211\u4e5f\u61d2\u5f97\u6df1\u5165\uff0c\u56e0\u4e3a\u6df1\u5165\u4e86\u4e5f\u662f\u4f1a\u88abAI\u4e5f\u527d\u7a83\u4e86\u53bb\uff0c\u5e76\u4e0d\u4f1a\u7ed9\u6211\u5e26\u6765\u4efb\u4f55\u597d\u5904\uff0c\u81ea\u7136\u5c31\u6ca1\u6709\u7814\u7a76\u8fd9\u7c7b\u6211\u81ea\u5df1\u4ee5\u540e\u4e5f\u4e0d\u4f1a\u4f7f\u7528\u7684\u7279\u6027\u7684\u52a8\u529b\u4e86\u3002<\/p>\n<p>\u4e3e\u4f8b\u6765\u8bf4\uff0c\u4eca\u65e5\u6709\u5c1d\u8bd5\u8be2\u95eeAI\u5bf9EditContext\u7684\u7406\u89e3\uff0c\u7ed3\u679c\u53d1\u73b0\u5f88\u591a\u90fd\u662f\u4e00\u672c\u6b63\u7ecf\u5730\u80e1\u8bf4\u516b\u9053\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-04-06_203224.png\" width=\"662\" height=\"434\" alt=\"\u80e1\u8bf4\u516b\u9053\u793a\u610f\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u56e0\u4e3a\u5565\u5462\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u7279\u6027\u7279\u522b\u7684\u65b0\u7684\uff0c\u4e1a\u5185\uff0c\u5c24\u5176\u4e2d\u6587\u5708\u5b50\u5185\uff0c\u8fd8\u6ca1\u6709\u76f8\u5173\u7684\u5b66\u4e60\u8d44\u6599\uff0c\u4e8e\u662f\u5c31\u6709\u5f88\u591a\u9519\u8bef\u7684\u8f93\u51fa\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u7b49\u54ea\u5929\u6293\u53d6\u4e86\u6211\u6216\u8005\u5176\u4ed6\u4e00\u4e9b\u4eba\u7684\u6587\u7ae0\u8f93\u51fa\uff0c\u81ea\u5df1\u518d\u201c\u5b66\u4e60\u201d\u4e00\u4e0b\uff0c\u8f93\u51fa\u4f1a\u66f4\u51c6\u786e\u4e9b\u3002<\/p>\n<p>\u4f46\uff0c\u641c\u7d22\u76f8\u5173\u4fe1\u606f\u7684\u7528\u6237\u5e76\u4e0d\u77e5\u9053\u8fd9\u4e2a\u4fe1\u606f\u6e90\u662f\u6211\u63d0\u4f9b\u4e86\uff0c\u4e5f\u4e0d\u4f1a\u8df3\u8f6c\u5230\u6211\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5bf9\u6211\u800c\u8a00\uff0c\u77e5\u8bc6\u8f93\u51fa\u5c31\u662f\u4e2a\u5403\u529b\u4e0d\u8ba8\u597d\u7684\u4e8b\u60c5\uff0c\u4ece\u67d0\u79cd\u610f\u4e49\u4e0a\u8bb2\uff0cAI\u7684\u51fa\u73b0\u4f1a\u6291\u5236\u4e2a\u4f53\u7684\u539f\u521b\u52a8\u529b\u3002<\/p>\n<p>ok\uff0c\u4e0d\u518d\u626f\u6de1\u4e86\uff0c\u81f3\u6b64\uff0c\u672c\u6587over\uff0c\u8d76\u5728\u6e05\u660e\u5047\u671f\u7ed3\u675f\u524d\u5199\u5b8c\u4e86\u3002<\/p>\n<p>\ud83e\uddd1\u200d\ud83e\uddd1\u200d\ud83e\uddd2\ud83e\uddd1\u200d\ud83e\uddd1\u200d\ud83e\uddd2\u200d\ud83e\uddd2\ud83e\uddd1\u200d\ud83e\uddd2<\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11618\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11618<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/editcontext-cover.jpg\" width=\"160\" height=\"100\" alt=\"EditContext API \u7b80\u4ecb\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>canvas\u753b\u5e03\u4e0a\u8f93\u5165\u6587\u5b57\u5e76\u4ea4\u4e92\uff0c\u8fd9\u4e2a\u9700\u6c42\u4e0d\u77e5\u9053\u5927\u5bb6\u9047\u5230\u8fc7\u6ca1\u6709\uff0c\u73b0\u5728\u53ef\u4ee5\u8bd5\u8bd5\u4f7f\u7528EditContext API\uff0c\u5929\u751f\u5c31\u4e3a\u4e86\u8fd9\u79cd\u9ad8\u7ea7\u8f93\u5165\u7f16\u8f91\u4f53\u9a8c\u8bbe\u8ba1\u7684\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1284],"tags":[215,53,544,2046],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11618"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=11618"}],"version-history":[{"count":6,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11618\/revisions"}],"predecessor-version":[{"id":11665,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11618\/revisions\/11665"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=11618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=11618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=11618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}