{"id":2417,"date":"2020-06-25T23:22:06","date_gmt":"2020-06-25T15:22:06","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=2417"},"modified":"2020-06-25T23:22:06","modified_gmt":"2020-06-25T15:22:06","slug":"salesforce%e5%bc%80%e5%8f%91%e4%ba%ba%e5%91%98%e7%9a%84javascript%e6%8a%80%e8%83%bd-%e4%ba%86%e8%a7%a3%e6%b5%8f%e8%a7%88%e5%99%a8%e4%b8%ad%e7%9a%84javascript","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=2417","title":{"rendered":"Salesforce\u5f00\u53d1\u4eba\u5458\u7684JavaScript\u6280\u80fd-\u4e86\u89e3\u6d4f\u89c8\u5668\u4e2d\u7684JavaScript"},"content":{"rendered":"\n\t\t\t\t\n<h2 class=\"wp-block-heading\">\u5b66\u4e60\u76ee\u6807<\/h2>\n\n\n\n<p>\u5b8c\u6210\u672c\u5355\u5143\u540e\uff0c\u60a8\u5c06\u80fd\u591f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u63cf\u8ff0JavaScript\u548c\u6d4f\u89c8\u5668\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002<\/li><li>\u89e3\u91caWeb 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href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------how-javascript-works-in-the-browser--\"><\/a>JavaScript\u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u5de5\u4f5c\u65b9\u5f0f<\/h2>\n\n\n\n<p>\u60a8\u521a\u521a\u4e86\u89e3\u4e86\u4e00\u4e9bJavaScript\u8fd0\u884c\u65f6\u5f15\u64ce\u548c\u8bed\u8a00\u3002\u60a8\u8fd8\u5b66\u5230\u4e86\u4e00\u4e9b\u7f16\u5199JavaScript\u7684\u4eba\u90fd\u5e94\u8be5\u77e5\u9053\u7684\u4e1c\u897f\u3002\u5728\u672c\u6a21\u5757\u4e2d\uff0c\u6211\u4eec\u91cd\u70b9\u4ecb\u7ecdJavaScript\u4e0e\u6d4f\u89c8\u5668\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u7279\u522b\u5173\u6ce8\u60a8\u7684\u7f51\u9875\u5728JavaScript\u4e2d\u7684\u5916\u89c2\u3002&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------the-javascript-runtime-is-not-the-browser-nor-is-the-browser-javascript--\"><\/a>JavaScript\u8fd0\u884c\u65f6\u4e0d\u662f\u6d4f\u89c8\u5668\uff0c\u4e5f\u4e0d\u662f\u6d4f\u89c8\u5668JavaScript<\/h2>\n\n\n\n<p>\u56e0\u6b64\uff0cJavaScript\u8fd0\u884c\u65f6\u5f15\u64ce\u53ef\u4ee5\u5728\u8bb8\u591a\u4e0d\u540c\u7684\u5730\u65b9\u8fd0\u884c\uff0c\u4f46\u662f\u6700\u5e38\u6258\u7ba1\u5728\u6d4f\u89c8\u5668\u4e2d\u3002\u90a3\u4e48JavaScript\u548c\u6d4f\u89c8\u5668\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f&nbsp;<\/p>\n\n\n\n<p>\u6d4f\u89c8\u5668\u7684\u4e3b\u8981\u5de5\u4f5c\u662f\u5145\u5f53Web\u670d\u52a1\u5668\u7684\u5ba2\u6237\u7aef\u3002\u5b83\u4f7f\u7528\u51e0\u79cd\u534f\u8bae\uff08\u901a\u5e38\u4e3aHTTP \/ 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src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser\/images\/d2e793ba31c2a56f6699de7e1f3691c0_cjkophow-000430-xcebpf-1-p-2-x-0.png\" alt=\"\u5177\u6709API\u7684JavaScript\u5f15\u64ce\"\/><\/figure>\n\n\n\n<p>\u4e3a\u4e86\u4f7f\u8fd9\u4e9b\u4ea4\u4e92\u6709\u6548\uff0c\u6d4f\u89c8\u5668\u4f1a\u663e\u793aAPI\u3002\u5b9e\u9645\u4e0a\uff0c\u4eba\u4eec\u8ba4\u4e3a\u5ba2\u6237\u7aefJavaScript\u7684\u5f88\u5927\u4e00\u90e8\u5206\u5b9e\u9645\u4e0a\u5c31\u662f\u8fd9\u4e9bAPI\u3002&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------web-apis--\"><\/a>Web 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href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#note\"><\/a>\u6ce8\u610f<\/h4>\n\n\n\n<p>\u6211\u4eec\u6b63\u5728\u907f\u5f00JavaScript\u751f\u6001\u7cfb\u7edf\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff1a\u62bd\u8c61\u6216\u6269\u5c55\u6d4f\u89c8\u5668\u529f\u80fd\u7684\u7b2c\u4e09\u65b9API\u548cJavaScript\u5e93\u3002\u8fd9\u4e9b\u5728\u91ce\u5916\u4f7f\u7528JavaScript\u65b9\u9762\u8d77\u7740\u91cd\u8981\u4f5c\u7528\u3002&nbsp;<\/p>\n\n\n\n<p>\u5c31\u6211\u4eec\u5728\u200b\u200bSalesforce\u4e2d\u7684\u76ee\u7684\u800c\u200b\u200b\u8a00\uff0c\u6211\u4eec\u6db5\u76d6\u4e86\u6211\u4eec\u7684JavaScript\u6846\u67b6\uff1aLightning Component Framework\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u5f53\u8c08\u8bbaLightning Platform\u4e0a\u7684JavaScript\u65f6\uff0c\u6b64\u6a21\u5757\u4ecb\u7ecd\u4e86Lightning 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href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------the-document-object-model--\"><\/a>\u6587\u6863\u5bf9\u8c61\u6a21\u578b<\/h2>\n\n\n\n<p><strong>DOM\uff1a\u60a8\u7684JavaScript\u9875\u9762<\/strong><\/p>\n\n\n\n<p>\u5f53\u8bf7\u6c42\u9875\u9762\u7136\u540e\u7531\u6d4f\u89c8\u5668\u63a5\u6536\u65f6\uff0c\u6d4f\u89c8\u5668\u5c06\u89e3\u6790HTML\u5e76\u521b\u5efa\u8be5\u9875\u9762\u7684\u63cf\u8ff0\u6216\u6a21\u578b\u3002\u6b64\u6a21\u578b\u7528\u4e8e\u5728\u6d4f\u89c8\u5668\u7684\u89c6\u53e3\u4e2d\u7ed8\u5236\u9875\u9762\u3002\u5b83\u4e5f\u901a\u8fc7DOM\u6d6e\u51fa\u6c34\u9762\u3002&nbsp;<\/p>\n\n\n\n<p>\u5c06DOM\u89c6\u4e3a\u4e00\u68f5\u6811\u3002\u5b83\u59cb\u4e8e\u6d4f\u89c8\u5668\u663e\u793a\u529f\u80fd\u7684\u6839\uff1a\u7a97\u53e3\u3002\u4ece\u90a3\u91cc\u5f00\u59cb\uff0c\u9875\u9762\u88ab\u5c01\u88c5\u5728\u4e2d<code>window.document<\/code>\uff0c\u9875\u9762\u7684\u4e3b\u4f53\u4f4d\u4e8e<code>window.document.body<\/code>\u3002\u7136\u540e\uff0c\u6811\u4f1a\u6247\u52a8\u5230\u9875\u9762\u4e0a\u6240\u8868\u793a\u7684\u6bcf\u4e00\u4f4d\u5185\u5bb9\u3002\u5927\u591a\u6570\u7f51\u9875\u90fd\u6709\u4e00\u4e2a\u975e\u5e38\u590d\u6742\u7684\u6811\uff0c\u5176\u4e2d\u8bb8\u591a\u8282\u70b9\u6700\u7ec8\u4ee5\u53f6\u8282\u70b9\u4f5c\u4e3a\u5c42\u6b21\u7ed3\u6784\u4e2d\u6700\u7ec6\u5316\u7684\u90e8\u5206\u7ed3\u675f\u3002&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser\/images\/fb9f1edaa5218e7dbfc2c88691f0c9ad_cjkophow-400440-xcef-0-x-6-tvre.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u4f5c\u4e3a\u4e00\u4e2aAPI\uff0cDOM\u662f\u5de8\u5927\u7684\uff0c\u5b83\u4f7f\u60a8\u53ef\u4ee5\u89e6\u6478\u6811\u7684\u6bcf\u4e2a\u90e8\u5206\u3002\u5b83\u8fd8\u5177\u6709\u8bb8\u591a\u4f18\u5316\u4e0eDOM\u4ea4\u4e92\u7684\u65b9\u6cd5\u3002\u770b\u4e00\u4e0bjsbin.com\u00a0\u4e0a\u7684\u8fd9\u4e2a\u7b80\u5355\u00a0\u793a\u4f8b\u3002\u5b83\u00a0\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8f93\u5165\u5b57\u6bb5<\/li><li>\u6dfb\u52a0\u9879\u76ee\u6309\u94ae<\/li><li>\u65e0\u5e8f\u5217\u8868<\/li><\/ul>\n\n\n\n<p>\u6bcf\u6b21\u5355\u51fb\u6309\u94ae\u65f6\uff0c\u4ee3\u7801\u90fd\u4f1a\u5230\u8fbe\u8f93\u5165\u5b57\u6bb5\uff0c\u8bfb\u53d6\u5176\u503c\uff0c\u5c06\u5176\u8f6c\u6362\u4e3a\u6587\u672c\u8282\u70b9\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0<code>li<\/code>\u5143\u7d20\uff0c\u5c06\u6587\u672c\u8282\u70b9\u63d2\u5165\u8be5<code>li<\/code>\u8282\u70b9\uff0c\u6700\u540e\u5c06\u65b0\u7684<code>li<\/code>-and-text\u8282\u70b9\u7c98\u8d34\u5230\u7684<code>ul<\/code>\u3002&nbsp;<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#note-1\"><\/a>\u6ce8\u610f<\/h4>\n\n\n\n<p>\u4e3a\u4e86\u83b7\u5f97\u66f4\u591a\u4e50\u8da3\uff0c\u5e76\u4e14\u5982\u679c\u60a8\u60f3\u5b9e\u8df5\u5230\u76ee\u524d\u4e3a\u6b62\u8ba8\u8bba\u7684\u4e00\u4e9b\u539f\u7406\uff0c\u8bf7\u67e5\u770b\u662f\u5426\u53ef\u4ee5\u4fee\u6539jsbin\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u68c0\u67e5\u6587\u672c\u8f93\u5165\u4e2d\u662f\u5426\u6709\u6570\u636e<\/li><li>\u5982\u679c\u4e0d\u662f\uff0c\u8bf7\u4e0d\u8981\u5728\u5217\u8868\u4e2d\u6dfb\u52a0\u65b0\u7684li<\/li><li>\u6dfb\u52a0\u65b0li\u540e\uff0c\u6e05\u9664\u6587\u672c\u8f93\u5165<\/li><\/ul>\n\n\n\n<p>\u5982\u679c\u60ac\u5ff5\u6740\u6b7b\u4e86\u60a8\uff0c\u8bf7\u67e5\u770b\u4fee\u6539\u540e\u7684\u00a0\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u5982\u60a8\u6240\u89c1\uff0c\u4ec5\u6b64\u7b80\u5355\u793a\u4f8b\u5c31\u9700\u8981\u5f00\u53d1\u4eba\u5458\u6267\u884c\u4e00\u7cfb\u5217\u624b\u52a8\u6b65\u9aa4\u3002\u800c\u4e14\u5b83\u751a\u81f3\u4e0d\u4f1a\u5728\u670d\u52a1\u5668\u4e0a\u5b58\u50a8\u4efb\u4f55\u6570\u636e\uff0c\u4e5f\u4e0d\u4f1a\u4ee5\u4efb\u4f55\u5176\u4ed6\u65b9\u5f0f\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92\u3002\u56e0\u6b64\uff0cJavaScript\u5e93\uff08reactjs\uff0cjQuery\uff09\u548c\u6846\u67b6\uff08Angular\uff0cvuejs\uff09\u5df2\u6210\u4e3a\u4ea4\u4e92\u5f0f\u9875\u9762\u7684\u6807\u51c6\u3002\u8fd9\u6837\u7684\u6846\u67b6\u4f1a\u62bd\u8c61\u5316\u5e76\u7b80\u5316DOM\u4ea4\u4e92\uff0c\u5e76\u4e14\u901a\u5e38\u4f1a\u81ea\u52a8\u5bf9\u7f3a\u5c11\u7684\u529f\u80fd\u5e94\u7528polyfill\u3002\u95ea\u7535\u7ec4\u4ef6\u6846\u67b6\u6ca1\u6709\u4ec0\u4e48\u4e0d\u540c\u3002&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------encapsulation-with-shadow-dom----\"><\/a>\u4f7f\u7528Shadow DOM\u5c01\u88c5<\/h2>\n\n\n\n<p>DOM API\u4e30\u5bcc\u800c\u7075\u6d3b\u3002\u4f7f\u7528\u76f8\u5bf9\u7b80\u5355\u7684JavaScript\uff0c\u5f88\u5bb9\u6613\u5bf9UI\u8c03\u7528\u7684\u5916\u89c2\uff0c\u884c\u4e3a\u548c\u52a8\u4f5c\u8fdb\u884c\u66f4\u6539\u3002&nbsp;<\/p>\n\n\n\n<p>\u4f46\u662f\u6709\u4e00\u4e2a\u9677\u9631\u3002DOM\u6a21\u578b\u4f7f\u5f97\u96be\u4ee5\u5c01\u88c5UI\u90e8\u5206\u5e76\u4fdd\u62a4\u5b83\u4eec\u514d\u53d7\u610f\u5916\uff08\u6216\u6709\u76ee\u7684\u548c\u6076\u610f\uff09\u66f4\u6539\u7684\u5f71\u54cd\u3002&nbsp;<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5f00\u53d1\u4e86Shadow DOM\u6807\u51c6\u3002Shadow DOM\u5728UI\u529f\u80fd\u7684\u7279\u5b9a\u90e8\u5206\u5468\u56f4\u521b\u5efa\u8fb9\u754c\u3002\u8be5\u8fb9\u754c\u53ef\u9632\u6b62\u7236\u6bcd\u66f4\u6539\u5b69\u5b50\u7684\u5143\u7d20\u6216CSS\u3002\u5b83\u8fd8\u4f1a\u5f3a\u5236\u8de8\u8fb9\u754c\u4f20\u64ad\u7684\u6240\u6709\u4e8b\u4ef6\u91cd\u65b0\u786e\u5b9a\u5176\u76ee\u6807\u8303\u56f4\uff0c\u4ece\u800c\u963b\u6b62\u7236\u7ea7\u8de8\u8d8a\u9634\u5f71DOM\u8fb9\u754c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------------the-lightning-component-framework-aura-components-and-lightning-web-components------\"><\/a>Lightning\u7ec4\u4ef6\u6846\u67b6\uff1aAura\u7ec4\u4ef6\u548cLightning Web\u7ec4\u4ef6<\/h2>\n\n\n\n<p>\u4eceSpring &#8217;19\u7248\u672c\uff08API\u7248\u672c45.0\uff09\u5f00\u59cb\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e24\u4e2a\u7f16\u7a0b\u6a21\u578b\u6765\u6784\u5efaLightning\u7ec4\u4ef6\uff1aLightning Web\u7ec4\u4ef6\u6a21\u578b\u548c\u539f\u59cb\u7684Aura\u7ec4\u4ef6\u6a21\u578b\u3002\u95ea\u7535Web\u7ec4\u4ef6\u662f\u4f7f\u7528HTML\u548c\u73b0\u4ee3JavaScript\u6784\u5efa\u7684\u81ea\u5b9a\u4e49HTML\u5143\u7d20\u3002\u95ea\u7535Web\u7ec4\u4ef6\u548cAura\u7ec4\u4ef6\u53ef\u4ee5\u5728\u9875\u9762\u4e0a\u5171\u5b58\u548c\u4e92\u64cd\u4f5c\u3002\u6b64\u5185\u5bb9\u4ec5\u6db5\u76d6Lightning Web Components\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#-----------------lightning-web-components-and-the-dom------\"><\/a>\u95ea\u7535Web\u7ec4\u4ef6\u548cDOM<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><a href=\"https:\/\/trailhead.salesforce.com\/content\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser#note-2\"><\/a>\u6ce8\u610f<\/h4>\n\n\n\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6bcf\u4e2a\u5355\u5143\u90fd\u6709\u4e00\u4e2a\u76f8\u4f3c\u7684\u90e8\u5206\uff0c\u5e76\u5e26\u6709\u4e00\u4e9b\u793a\u4f8b\uff0c\u4ee5\u8bf4\u660e\u4e0eLightning Web Components\u7684\u5173\u8054\u3002\u5982\u679c\u60a8\u60f3\u5e94\u7528\u6240\u5b66\u5185\u5bb9\uff0c\u73b0\u5728\u662f\u5f00\u59cb\u5728Trailhead\u4e0a\u4f7f\u7528Lightning Web Components Basics\u00a0\u6a21\u5757\u7684\u597d\u65f6\u673a\u00a0\u3002<\/p>\n\n\n\n<p><strong>\u81ea\u52a8DOM\u66f4\u65b0<\/strong><\/p>\n\n\n\n<p>Lightning\u7ec4\u4ef6\u7684\u57fa\u672c\u4ef7\u503c\u5728\u4e8e\u6784\u5efa\u7531Salesforce\u6570\u636e\u9a71\u52a8\u7684\u81ea\u5b9a\u4e49UI\u3002\u8fd9\u4e0eDOM\u64cd\u4f5c\u6709\u5173\uff0c\u56e0\u4e3aDOM\u672c\u8eab\u662f\u7531Salesforce\u6570\u636e\u9a71\u52a8\u7684\u3002&nbsp;<\/p>\n\n\n\n<p>\u8be5\u7ec4\u4ef6\u4ee5\u6700\u7b80\u5355\u7684\u5f62\u5f0f\u6f14\u793a\u4e86\u8be5\u539f\u7406\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/modules\/javascript-essentials-salesforce-developers\/understand-js-in-browser\/images\/06244c905bc9bc3c18a7a363c09f592e_cju-2-jkpxx-000-h-0-z-98-obqbcdd-8.png\" alt=\"\u5177\u6709\u6570\u636e\u9a71\u52a8UI\u7684\u7b80\u5355\u7ec4\u4ef6\uff0c\u663e\u793a\u7684\u6587\u672c\u4e3a\u201c\u6b64\u6587\u672c\u6765\u81eaJS\u9053\u5177\u3002\"\/><\/figure>\n\n\n\n<p>\u8fd9\u662f\u6b64\u7ec4\u4ef6\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ JavaScript Module: demo.js\nimport { LightningElement } from 'lwc';\nexport default class Demo extends LightningElement {\n    text = 'This text came from a JS prop';\n}\n&lt;!-- HTML Template: demo.html -->\n&lt;template>\n    &lt;lightning-card title=\"Basic DOM Example\" icon-name=\"utility:hierarchy\">\n        &lt;div class=\"slds-card__body slds-card__body-inner\">\n            &lt;p>\n                &lt;lightning-formatted-text value={text}>&lt;\/lightning-formatted-text>\n            &lt;\/p>\n        &lt;\/div>\n    &lt;\/lightning-card>\n&lt;\/template><\/code><\/pre>\n\n\n\n<p>\u9996\u5148\u4ecb\u7ecd\u4e00\u4e0b\u4e0a\u4e0b\u6587\uff1a\u6bcf\u4e2aLightning Web\u7ec4\u4ef6\u90fd\u9700\u8981\u4e00\u4e2aJavaScript\u6a21\u5757\u3002\u5982\u679c\u7ec4\u4ef6\u5305\u542b\u8981\u5448\u73b0\u7ed9\u7528\u6237\u7684\u4efb\u4f55\u5143\u7d20\uff0c\u5219\u4e5f\u9700\u8981HTML\u6a21\u677f\u3002\u5927\u591a\u6570\u7ec4\u4ef6\u5728\u6346\u7ed1\u4e2d\u90fd\u5305\u542b\u4e00\u4e2aJavaScript\u548c\u4e00\u4e2aHTML\u6587\u4ef6\u3002&nbsp;<\/p>\n\n\n\n<p>Lightning Web Components\u4f7f\u5c06\u6570\u636e\u5448\u73b0\u5230UI\u53d8\u5f97\u6beb\u4e0d\u8d39\u529b\u3002\u4f8b\u5982\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u4f7f\u7528JavaScript\u5c5e\u6027<code>text<\/code>\u5b58\u50a8\u786c\u7f16\u7801\u7684\u5b57\u7b26\u4e32\u3002\u5728<code>&lt;lightning-formatted-text&gt;<\/code>\u6807\u8bb0\u4e2d\uff0c<code>value<\/code>&nbsp;\u5c5e\u6027\u7684<code>text<\/code>\u5c5e\u6027\u7ed1\u5b9a\u5230JavaScript&nbsp;<code>text<\/code>\u5c5e\u6027\uff0c\u4ece\u800c\u5728UI\u4e2d\u5448\u73b0\u6570\u636e\u3002&nbsp;<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u7528\u6237\u4ea4\u4e92\u65f6\u66f4\u6539UI\uff0c\u8be5\u600e\u4e48\u529e\uff1f\u6211\u4eec\u53ef\u4ee5\u6269\u5c55\u8fd9\u4e2a\u4f8b\u5b50\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002<\/p>\n\n\n\n<figure><iframe width=\"912\" height=\"513\" src=\"https:\/\/www.youtube.com\/embed\/5KRjiCArONM?wmode=opaque\" allowfullscreen=\"\"><\/iframe><\/figure>\n\n\n\n<p>\u8fd9\u662f\u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ JavaScript Module demo2.js\nimport { LightningElement, track } from 'lwc';\nexport default class Demo2 extends LightningElement {\n    @track text = '';\n    handleChange(event){\n        this.text = event.target.value;\n     }\n}\n&lt;!-- HTML Template demo2.html -->\n&lt;template>\n    &lt;lightning-card title=\"Basic DOM Example\" icon-name=\"utility:hierarchy\">\n        &lt;div class=\"slds-card__body slds-card__body-inner\">\n            &lt;p>\n                &lt;lightning-formatted-text value={text}>&lt;\/lightning-formatted-text>\n            &lt;\/p>\n            &lt;p>\n                &lt;lightning-input onchange={handleChange} label=\"Input Text\" value={text}>&lt;\/lightning-input>\n            &lt;\/p>\n        &lt;\/div>\n    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&nbsp;<\/p>\n\n\n\n<p>\u5728\u6a21\u677f\u4e2d\uff0c\u6211\u4eec\u6dfb\u52a0\u4e86\u4e00\u4e2a<code>&lt;lightning-input&gt;<\/code>\u3002\u5c3d\u7ba1\u7ed1\u5b9a<code>text<\/code>\u5c5e\u6027\u662f\u663e\u793a\u6570\u636e\u7684\u5173\u952e\uff0c\u4f46\u8bf7\u6ce8\u610f\u8be5<code>onchange<\/code>\u5c5e\u6027\u3002<code>handleChange<\/code>\u73b0\u5728\u5df2\u7531<code>change<\/code>\u4e8b\u4ef6\u89e6\u53d1\u5df2\u6dfb\u52a0\u5230JavaScript\u6a21\u5757\u7684\u529f\u80fd\u3002\u7528\u6237\u5bf9\u503c\u7684\u6bcf\u6b21\u4fee\u6539\u90fd\u4f1a\u66f4\u65b0\u7684\u503c<code>text<\/code>\u3002\u6587\u672c\u66f4\u65b0\u65f6\uff0cDOM\u4e5f\u66f4\u65b0\u3002 &nbsp;<\/p>\n\n\n\n<p>\u5c3d\u7ba1\u8fd9\u662f\u4e00\u4e2a\u4eba\u4e3a\u7684\u793a\u4f8b\uff0c\u4f46\u5b83\u8bf4\u660e\u4e86Lightning Web 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