{"id":3294,"date":"2021-01-13T15:10:13","date_gmt":"2021-01-13T07:10:13","guid":{"rendered":"http:\/\/www.salesforcecrm.cn\/?p=3294"},"modified":"2021-01-13T15:10:13","modified_gmt":"2021-01-13T07:10:13","slug":"%e4%bd%bf%e7%94%a8lightning-web%e7%bb%84%e4%bb%b6%e6%9e%84%e5%bb%babear-tracking%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f-%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aahello-world-lightning-web%e7%bb%84%e4%bb%b6","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3294","title":{"rendered":"\u4f7f\u7528Lightning Web\u7ec4\u4ef6\u6784\u5efaBear-tracking\u5e94\u7528\u7a0b\u5e8f &#8211; \u521b\u5efa\u4e00\u4e2aHello World Lightning Web\u7ec4\u4ef6"},"content":{"rendered":"<h2 id=\"learning-objectives\"><span>\u5b66\u4e60\u76ee\u6807<\/span><\/h2>\n<p><span>\u5728\u6b64\u9879\u76ee\u4e2d\uff0c\u60a8\u5c06\uff1a<\/span><\/p>\n<ul>\n<li><span>\u6784\u5efa\u4e00\u7ec4\u7b80\u5355\u7684Lightning Web\u7ec4\u4ef6\u3002<\/span><\/li>\n<li><span>\u4ece\u5355\u4e2a\u8bb0\u5f55\uff0c\u7136\u540e\u4ece\u8bb0\u5f55\u5217\u8868\u4e2d\u68c0\u7d22\u5e76\u663e\u793a\u6570\u636e\u3002<\/span><\/li>\n<li><span>\u5c06\u529f\u80fd\u5c01\u88c5\u5230\u5b50\u7ec4\u4ef6\u4e2d\u3002<\/span><\/li>\n<li><span>\u4f7f\u7528\u4e8b\u4ef6\u8fdb\u884c\u8de8\u7ec4\u4ef6\u901a\u4fe1\u3002<\/span><\/li>\n<\/ul>\n<h2 id=\"introduction\"><span>\u4ecb\u7ecd<\/span><\/h2>\n<p><span>\u5728\u8fd9\u4e2a\u9879\u76ee\u4e2d\uff0c\u60a8\u5c06\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u8ba9\u516c\u56ed\u7ba1\u7406\u5458\u8ddf\u8e2a\u718a\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u5c1d\u8bd5Lightning Web Components\u7684\u57fa\u672c\u6982\u5ff5\u3002<\/span><\/p>\n<p><span>Lightning Web Components\u662f\u7528\u4e8e\u6784\u5efaLightning\u7ec4\u4ef6\u7684\u65b0\u7f16\u7a0b\u6a21\u578b\u3002\u5b83\u4f7f\u7528\u6700\u65b0\u7684Web\u6807\u51c6\uff0c\u5e76\u4e14\u53ef\u4ee5\u4e0e\u539f\u59cb\u7684Aura\u7f16\u7a0b\u6a21\u578b\u4e92\u64cd\u4f5c\u3002<\/span><\/p>\n<p><span>\u5728\u6b64\u9879\u76ee\u4e2d\uff0c\u60a8\u4e3a\u865a\u62df\u56fd\u5bb6\u516c\u56edUrsus Park\u5de5\u4f5c\u3002\u60a8\u521b\u5efa\u7684\u5e94\u7528\u7a0b\u5e8f\u5141\u8bb8\u62a4\u6797\u5458\u8ddf\u8e2a\u5728\u516c\u56ed\u4e2d\u6e38\u8361\u7684\u718a\u3002<\/span><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"image image-block image-center\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/52cbc90ceba46df033d2f2d58154caff_cjqss-8-vv-900190-w-9-zs-0-erkzc-8.png\" alt=\"\u5df2\u5b8c\u6210\u7684Ursus Park\u5e94\u7528\u7a0b\u5e8f\u6982\u8ff0\" width=\"624\" height=\"312\" \/><\/p>\n<div class=\"box message info\">\n<div class=\"inner\">\n<div class=\"bd\">\n<div class=\"media\"><img decoding=\"async\" class=\"img mtm\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/image\/upload\/doc\/trailhead\/en-usb473bb5ea1b7e61dfb07e6a7e547de6b.gif\" alt=\"\u6ce8\u610f\" \/><\/p>\n<div class=\"mediaBd\">\n<h4 class=\"mbs\"><span>\u6ce8\u610f<\/span><\/h4>\n<div class=\"message-media-content\"><span>\u5728\u6b64\u9879\u76ee\u4e2d\uff0c\u6211\u4eec\u9488\u5bf9Trailhead Playground\u7ec4\u7ec7\u8fdb\u884c\u5f00\u53d1\u3002\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b<\/span><code>force:source:push<\/code><span>\u547d\u4ee4\u9488\u5bf9\u4e34\u65f6\u7ec4\u7ec7\u5f00\u53d1Lightning Web\u7ec4\u4ef6\u3002\u901a\u8fc7\u201c<\/span><span>\u4f7f\u7528Salesforce DX<\/span><span>\u8fdb\u884c\u5e94\u7528\u5f00\u53d1\u201d\u6a21\u5757\u4e86\u89e3\u6709\u5173\u6e90\u9a71\u52a8\u5f00\u53d1\u7684\u66f4\u591a\u4fe1\u606f\u00a0\u3002<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 id=\"before-you-begin\"><span>\u5728\u4f60\u5f00\u59cb\u4e4b\u524d<\/span><\/h2>\n<p><span>\u5728\u8fdb\u884c\u6b64\u9879\u76ee\u4e4b\u524d\uff0c\u8bf7\u786e\u4fdd\u5b8c\u6210\u201c<\/span><span>\u5feb\u901f\u5165\u95e8\uff1a\u95ea\u7535Web\u7ec4\u4ef6\u201d\u4e2d\u7684<\/span><span>\u8fd9\u4e9b\u6b65\u9aa4\u00a0\u3002\u5982\u679c\u60a8\u5c1a\u672a\u5b8c\u6210\u5feb\u901f\u5165\u95e8\u4e2d\u7684\u6b65\u9aa4\uff0c\u5219\u5c06\u65e0\u6cd5\u5b8c\u6210\u8be5\u9879\u76ee\u3002<\/span><\/p>\n<p><span>\u786e\u4fdd\u5df2\u5b89\u88c5VS Code\u548cSalesforce CLI\u3002<\/span><\/p>\n<h2 id=\"setup-your-trailhead-playground\"><span>\u8bbe\u7f6e\u60a8\u7684Trailhead\u6e38\u4e50\u573a<\/span><\/h2>\n<ol>\n<li><span>\u8981\u521b\u5efa\u65b0\u7684Trailhead Playground\uff0c\u8bf7\u70b9\u51fb\u6b64\u6b65\u9aa4\u672b\u5c3e\u7684\u4e0b\u62c9\u83dc\u5355\uff0c\u7136\u540e\u9009\u62e9<\/span><strong><span>Create a Trailhead Playground<\/span><\/strong><span>\u3002<\/span><img decoding=\"async\" class=\"image image-block\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/ffbdafb543852b38bdc39c2a23a4c60e_cjptytawz-00050-s-89-wv-5-yqpeq.png\" alt=\"\u5728\u6a21\u5757\u7684\u52a8\u624b\u7ec3\u4e60\u4e2d\u521b\u5efa\u4e00\u4e2aTrailrail\u6e38\u4e50\u573a\u4e0b\u62c9\u83dc\u5355\u3002\" \/><\/li>\n<li><span>\u62e5\u6709Trailhead\u6e38\u4e50\u573a\u540e\uff0c\u5355\u51fb\u201c\u542f\u52a8\u201d\u3002<\/span><\/li>\n<\/ol>\n<p><span>\u5982\u679c\u60a8\u5728\u7ec4\u7ec7\u4e2d\u770b\u5230\u4e00\u4e2a\u6807\u7b7e\u4e3a\u201c\u83b7\u53d6\u767b\u5f55\u51ed\u636e\u201d\u7684\u6807\u7b7e\uff0c\u90a3\u5c31\u592a\u597d\u4e86\uff01\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\u3002\u00a0<\/span><\/p>\n<p><span>\u5982\u679c\u4e0d\u662f\uff0c\u8bf7\u6253\u5f00App Launcher\uff08\u00a0<\/span><img decoding=\"async\" class=\"image\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/3399b340afe21729752a30c52a639255_app-launcher-5.png\" alt=\"\u5e94\u7528\u542f\u52a8\u5668\" width=\"20\" height=\"21\" \/><span>\uff09\uff0c\u627e\u5230\u5e76\u9009\u62e9Playground Starter\uff0c\u7136\u540e\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\u3002\u5982\u679c\u60a8\u6ca1\u6709\u770b\u5230Playground Starter\u5e94\u7528\u7a0b\u5e8f\uff0c\u8bf7\u5728Trailhead\u5e2e\u52a9\u4e2d\u7b7e\u51fa\u00a0<\/span><span>\u67e5\u627eTrailhead Playground\u7684\u7528\u6237\u540d\u548c\u5bc6\u7801<\/span><span>\u3002<\/span><\/p>\n<ol>\n<li><span>\u5355\u51fb<\/span><strong><span>\u83b7\u53d6\u60a8\u7684\u767b\u5f55\u51ed\u636e<\/span><\/strong><span>\u9009\u9879\u5361\uff0c\u5e76\u8bb0\u4e0b\u60a8\u7684\u7528\u6237\u540d\u3002<\/span><\/li>\n<li><span>\u5355\u51fb<\/span><strong><span>\u91cd\u7f6e\u6211\u7684\u5bc6\u7801<\/span><\/strong><span>\u3002\u8fd9\u4f1a\u5c06\u7535\u5b50\u90ae\u4ef6\u53d1\u9001\u5230\u4e0e\u60a8\u7684\u7528\u6237\u540d\u5173\u8054\u7684\u5730\u5740\u3002<\/span><\/li>\n<li><span>\u5355\u51fb\u7535\u5b50\u90ae\u4ef6\u4e2d\u7684\u94fe\u63a5\u3002<\/span><\/li>\n<li><span>\u8f93\u5165\u65b0\u5bc6\u7801\uff0c\u786e\u8ba4\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>\u66f4\u6539\u5bc6\u7801<\/span><\/strong><span>\u3002<\/span><\/li>\n<\/ol>\n<h2 id=\"set-up-the-ursus-park-app\"><span>\u8bbe\u7f6eUrsus Park\u5e94\u7528<\/span><\/h2>\n<ol>\n<li><span>\u6253\u5f00\u547d\u4ee4\u63d0\u793a\u7b26\uff0c\u4f8b\u5982Windows\u4e0a\u7684cmd\u6216MacOS\u4e0a\u7684Terminal\u3002<\/span><\/li>\n<li><span>\u514b\u9686Ursus Park\u5e94\u7528\u7a0b\u5e8fgit\u5b58\u50a8\u5e93\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">git clone https<span class=\"token operator\">:<\/span><span class=\"token operator\">\/<\/span><span class=\"token operator\">\/<\/span>github<span class=\"token punctuation\">.<\/span>com<span class=\"token operator\">\/<\/span>trailheadapps<span class=\"token operator\">\/<\/span>build<span class=\"token operator\">-<\/span>apps<span class=\"token operator\">-<\/span><span class=\"token keyword\">with<\/span><span class=\"token operator\">-<\/span>lwc<span class=\"token punctuation\">.<\/span>git<\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8be5\u5b58\u50a8\u5e93\u5305\u542bUrsus Park\u5e94\u7528\u7a0b\u5e8f\uff0c\u5177\u6709\u4e00\u7ec4\u5b57\u6bb5\uff0c\u8bb0\u5f55\u548c\u9875\u9762\u5e03\u5c40\u7684Bear\u5bf9\u8c61\u4ee5\u53ca\u7528\u4e8e\u68c0\u7d22\u718a\u8bb0\u5f55\u548c\u6837\u672c\u718a\u8bb0\u5f55\u7684Apex\u4ee3\u7801\u3002\u8be5\u9879\u76ee\u57fa\u7840\u5e2e\u52a9\u6211\u4eec\u4e13\u6ce8\u4e8eLightning Web Component\u5f00\u53d1\u3002\u8bf7\u6ce8\u610f\uff0cVS Code\u96c6\u6210\u4e86Git\u652f\u6301\uff0c\u60a8\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4ece\u5f00\u653e\u6e90\u4ee3\u7801\u7ad9\u70b9\uff08https:\/\/git-scm.com\/\uff09\u5b89\u88c5\u5b83\u3002<\/span><\/li>\n<li><span>\u5bfc\u822a\u5230\u65b0\u7684build-apps-with-lwc\u76ee\u5f55\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">cd build<span class=\"token operator\">-<\/span>apps<span class=\"token operator\">-<\/span><span class=\"token keyword\">with<\/span><span class=\"token operator\">-<\/span>lwc<\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u4f7f\u7528Salesforce CLI\u6388\u6743Trailhead Playground\uff0c\u4f7f\u7528<\/span><code>bear-tracking<\/code><span>\u522b\u540d\u4fdd\u5b58\u5b83\uff0c\u5e76\u5c06\u5f53\u524d\u7528\u6237\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u7528\u6237\uff1a<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx auth<span class=\"token operator\">:<\/span>web<span class=\"token operator\">:<\/span>login <span class=\"token operator\">-<\/span>s <span class=\"token operator\">-<\/span>a bear<span class=\"token operator\">-<\/span>tracking<\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5f53\u5e26\u6709Salesforce\u767b\u5f55\u9875\u9762\u7684\u6d4f\u89c8\u5668\u7a97\u53e3\u6253\u5f00\u65f6\uff0c\u8f93\u5165\u60a8\u7684Trailhead Playground\u51ed\u636e\u3002<\/span><\/li>\n<li><span>\u5c06\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u90e8\u7f72\u5230\u7ec4\u7ec7\u4e2d\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx force<span class=\"token operator\">:<\/span>source<span class=\"token operator\">:<\/span>deploy <span class=\"token operator\">-<\/span>p force<span class=\"token operator\">-<\/span>app<span class=\"token operator\">\/<\/span>main<span class=\"token operator\">\/<\/span><span class=\"token keyword\">default<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5c06Ursus Park\u7528\u6237\u6743\u9650\u96c6\u5206\u914d\u7ed9\u5f53\u524d\u7528\u6237\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx force<span class=\"token operator\">:<\/span>user<span class=\"token operator\">:<\/span>permset<span class=\"token operator\">:<\/span>assign <span class=\"token operator\">-<\/span>n <span class=\"token class-name\">Ursus_Park_User<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5bfc\u5165\u6837\u672c\u6570\u636e\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx force<span class=\"token operator\">:<\/span>data<span class=\"token operator\">:<\/span>tree<span class=\"token operator\">:<\/span><span class=\"token keyword\">import<\/span> <span class=\"token operator\">-<\/span>p data<span class=\"token operator\">\/<\/span>plan<span class=\"token punctuation\">.<\/span>json<\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00\u7ec4\u7ec7\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx force<span class=\"token operator\">:<\/span>org<span class=\"token operator\">:<\/span><span class=\"token keyword\">open<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5728\u5e94\u7528\u542f\u52a8\u5668\uff08\u00a0<\/span><img decoding=\"async\" class=\"image\" src=\"https:\/\/trailmaker-assets.s3.amazonaws.com\/imagesffcc7135a2442948f20fb4508bb9c990.png\" alt=\"\u5e94\u7528\u542f\u52a8\u5668\" \/><span>\uff09\u4e2d\uff0c\u627e\u5230\u5e76\u9009\u62e9Ursus Park\u3002\u8fd9\u5c06\u6253\u5f00\u95ea\u7535\u5e94\u7528\u7a0b\u5e8f\u3002<\/span><\/li>\n<li><span>\u5355\u51fb<\/span><strong><span>Bears<\/span><\/strong><span>\u9009\u9879\u5361\uff0c\u5e76\u786e\u4fdd\u5df2\u586b\u5145\u4e00\u4e9b\u793a\u4f8b\u6570\u636e\u3002<\/span><\/li>\n<\/ol>\n<h2 id=\"create-a-hello-world-lightning-web-component-with-static-html\"><span>\u4f7f\u7528\u9759\u6001HTML\u521b\u5efaHello World Lightning Web\u7ec4\u4ef6<\/span><\/h2>\n<p><span>\u8ba9\u6211\u4eec\u521b\u5efa\u7b2c\u4e00\u4e2aLightning Web\u7ec4\u4ef6\uff1a\u4e00\u4e2a\u7b80\u5355\u7684hello world\u7ec4\u4ef6\u3002<\/span><\/p>\n<ol>\n<li><span>\u6253\u5f00VS Code\u3002<\/span><\/li>\n<li><span>\u901a\u8fc7\u5355\u51fb<\/span><strong><span>\u6587\u4ef6&gt;\u6253\u5f00<\/span><\/strong>\u00a0<strong><span>\u6587\u4ef6\u5939<\/span><\/strong><span>\u5e76\u5bfc\u822a\u5230\u8be5<\/span><code>build-apps-with-lwc<\/code><span>\u6587\u4ef6<strong>\u5939\u00a0<\/strong>\uff0c\u6dfb\u52a0\u521a\u4eceGitHub\u514b\u9686\u7684\u9879\u76ee\u6587\u4ef6\u5939\u3002<\/span><\/li>\n<li><span>\u5728\u8fb9\u680f\u4e2d\uff0c\u5c55\u5f00<\/span><code>force-app\/main\/default<\/code><span>\u6587\u4ef6\u5939\u3002<\/span><\/li>\n<li><span>\u5728\u4ee5\u4e0b\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a<\/span><code>lwc<\/code><span>\u6587\u4ef6\u5939<\/span><code>force-app\/main\/default<\/code><\/li>\n<li><span>\u53f3\u952e\u5355\u51fb\u8be5<\/span><code>lwc<\/code><span>\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>SFDX\uff1a\u521b\u5efaLightning Web\u7ec4\u4ef6<\/span><\/strong><span>\u5e76\u547d\u540d\u8be5\u7ec4\u4ef6<\/span><code>helloWebComponent<\/code><span>\u3002<\/span><br \/>\n<span>\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7<\/span><code>sfdx force:lightning:component:create --type lwc -n helloWebComponent -d force-app\/main\/default\/lwc<\/code><span>\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u4e0b\u8fd0\u884c\u6765\u83b7\u5f97\u76f8\u540c\u7684\u7ed3\u679c\u3002<\/span><\/li>\n<li><span>\u5c06\u5185\u5bb9\u66ff\u6362\u4e3a<\/span><code>helloWebComponent.html<\/code><span>\u4ee5\u4e0b\u6807\u8bb0\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>template<span class=\"token punctuation\">&gt;<\/span><\/span>\n\t<span class=\"token operator\">&lt;<\/span>lightning<span class=\"token operator\">-<\/span>card title<span class=\"token operator\">=<\/span><span class=\"token string\">\"Lightning Web Component\"<\/span> icon<span class=\"token operator\">-<\/span>name<span class=\"token operator\">=<\/span><span class=\"token string\">\"custom:custom14\"<\/span><span class=\"token operator\">&gt;<\/span>\n\t\t<span class=\"token operator\">&lt;<\/span>div <span class=\"token keyword\">class<\/span><span class=\"token operator\">=<\/span><span class=\"token string\">\"slds-var-m-around_medium\"<\/span><span class=\"token operator\">&gt;<\/span>\n\t\t\t<span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>h2<span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token class-name\">Hello<\/span> <span class=\"token class-name\">World<\/span><span class=\"token operator\">!<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>h2<span class=\"token operator\">&gt;<\/span>\n\t\t<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>div<span class=\"token operator\">&gt;<\/span>\n\t<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>lightning<span class=\"token operator\">-<\/span>card<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>template<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8be5\u6807\u8bb0\u4f7f\u7528\u9759\u6001\u6587\u672c\u5b9a\u4e49\u4e86\u00a0<\/span><span>\u5361\u7247\u57fa\u7840\u7ec4\u4ef6<\/span><span>\u3002<\/span><\/li>\n<li><span>\u7f16\u8f91<\/span><code>helloWebComponent.js-meta.xml<\/code><span>\u6587\u4ef6\uff0c\u5e76\u66ff\u6362<\/span><code>&lt;isExposed&gt;false&lt;\/isExposed&gt;<\/code><span>\u4e3a\u8fd9\u4e9b\u884c\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>isExposed<span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token boolean\">true<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>isExposed<span class=\"token operator\">&gt;<\/span>\n<span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>targets<span class=\"token punctuation\">&gt;<\/span><\/span>\n\t<span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>target<span class=\"token punctuation\">&gt;<\/span><\/span>lightning__AppPage<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>target<span class=\"token operator\">&gt;<\/span>\n\t<span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>target<span class=\"token punctuation\">&gt;<\/span><\/span>lightning__RecordPage<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>target<span class=\"token operator\">&gt;<\/span>\n\t<span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>target<span class=\"token punctuation\">&gt;<\/span><\/span>lightning__HomePage<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>target<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>targets<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8fd9\u4e9b\u989d\u5916\u7684\u884c\u5141\u8bb8\u60a8\u5c06\u7ec4\u4ef6\u6dfb\u52a0\u5230Lightning App Builder\u4e2d\u7684\u4efb\u4f55\u7c7b\u578b\u7684Lightning\u9875\u9762\u3002<\/span><\/li>\n<li><span>\u5c06\u66f4\u65b0\u7684\u4ee3\u7801\u90e8\u7f72\u5230\u7ec4\u7ec7\u3002\u5728VS Code\u4e2d\uff0c\u53f3\u952e\u5355\u51fb\u9ed8\u8ba4\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>SFDX\uff1a\u5c06\u6e90\u90e8\u7f72\u5230\u7ec4\u7ec7<\/span><\/strong><span>\u3002<\/span><\/li>\n<\/ol>\n<h2 id=\"add-the-hello-world-component-to-a-page\"><span>\u5c06Hello World\u7ec4\u4ef6\u6dfb\u52a0\u5230\u9875\u9762<\/span><\/h2>\n<p><span>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5b9e\u73b0\u4e86\u7ec4\u4ef6\uff0c\u8ba9\u6211\u4eec\u5c06\u5176\u6dfb\u52a0\u5230\u9875\u9762\u4e2d\u4ee5\u5bf9\u5176\u8fdb\u884c\u67e5\u770b\u3002<\/span><\/p>\n<ol>\n<li><span>\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00\u7ec4\u7ec7\uff1a<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">sfdx force<span class=\"token operator\">:<\/span>org<span class=\"token operator\">:<\/span><span class=\"token keyword\">open<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5728\u5e94\u7528\u542f\u52a8\u5668\uff08\u00a0<\/span><img decoding=\"async\" class=\"image\" src=\"https:\/\/trailmaker-assets.s3.amazonaws.com\/imagesffcc7135a2442948f20fb4508bb9c990.png\" alt=\"\u5e94\u7528\u542f\u52a8\u5668\" \/><span>\uff09\u4e2d\uff0c\u627e\u5230\u5e76\u9009\u62e9Ursus Park\u3002\u8fd9\u5c06\u6253\u5f00\u5e94\u7528\u7a0b\u5e8f\u4e3b\u9875\u3002<\/span><\/li>\n<li><span>\u5355\u51fb\u9f7f\u8f6e\u56fe\u6807\uff08\u00a0<\/span><img decoding=\"async\" class=\"image\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/8285b258a0d48e9c46536b539ab038f3_setup-icon-5.png\" alt=\"\u5b89\u88c5\u88c5\u7f6e\" \/><span>\u00a0\uff09\uff0c\u7136\u540e\u9009\u62e9\u201c<\/span><strong><span>\u7f16\u8f91\u9875\u9762\u201d<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5728\u201c\u81ea\u5b9a\u4e49\u7ec4\u4ef6\u201d\u4e0b\uff0c\u627e\u5230\u60a8\u7684helloWebComponent\u7ec4\u4ef6\u5e76\u5c06\u5176\u62d6\u52a8\u5230\u53f3\u4fa7\u5217\u7684\u9876\u90e8\u3002<\/span><\/li>\n<li><span>\u70b9\u51fb<\/span><strong><span>\u4fdd\u5b58<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u7531\u4e8e\u8fd9\u662f\u6211\u4eec\u7b2c\u4e00\u6b21\u4fee\u6539\u6807\u51c6\u4e3b\u9875\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u6fc0\u6d3b\u66f4\u65b0\u7684\u9875\u9762\uff0c\u4ee5\u4fbf\u6211\u4eec\u7684\u7528\u6237\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u6240\u505a\u7684\u4e8b\u60c5\u3002\u70b9\u51fb<\/span><strong><span>\u6fc0\u6d3b<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5355\u51fb<\/span><strong><span>\u5e94\u7528\u7a0b\u5e8f\u9ed8\u8ba4<\/span><\/strong><span>\u9009\u9879\u5361\u3002<\/span><\/li>\n<li><span>\u5355\u51fb<\/span><strong><span>\u5206\u914d\u7ed9\u5e94\u7528\u7a0b\u5e8f<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u68c0\u67e5<\/span><strong><span>Ursus\u516c\u56ed<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5355\u51fb<\/span><strong><span>\u4e0b\u4e00\u6b65<\/span><\/strong><span>\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>\u4fdd\u5b58<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5355\u51fb\u4e0a<\/span><strong><span>\u4e00\u6b65<\/span><img decoding=\"async\" class=\"image\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/5b5d24c7d563f7489309a50141d51a0a_dd-338-dde-3818-4160-b-816-e-7-b-46410-f-113.png\" alt=\"\u8fd4\u56de\u952e\" width=\"43\" height=\"49\" \/><\/strong><span>\u8fd4\u56de\u5230\u4e3b\u9875\u3002<\/span><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"image image-block image-center\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/521911491056a3743b26b4ff924c19f7_cjqss-8-vvi-001-d-0-w-9-z-2-rqa-0-fll.png\" alt=\"Ursus Park\u4e3b\u9875\u4e0a\u7684\u9759\u6001Lightning Web\u7ec4\u4ef6\" width=\"624\" height=\"235\" \/><\/p>\n<p><span>\u606d\u559c\u4f60\uff01\u60a8\u521a\u521a\u521b\u5efa\u4e86\u7b2c\u4e00\u4e2aLightning Web\u7ec4\u4ef6\u5e76\u5c06\u5176\u6dfb\u52a0\u5230Lightning Experience\u4e2d\u7684\u9875\u9762\u3002\u8fd9\u4e2a\u7b2c\u4e00\u4e2a\u7248\u672c\u5e76\u6ca1\u6709\u592a\u5927\u7684\u4f5c\u7528\uff0c\u6240\u4ee5\u8ba9\u6211\u4eec\u5c06\u5176\u8f6c\u53d8\u4e3a\u66f4\u5177\u52a8\u6001\u6027\u7684\u4e1c\u897f\u3002<\/span><\/p>\n<h2 id=\"use-data-binding\"><span>\u4f7f\u7528\u6570\u636e\u7ed1\u5b9a<\/span><\/h2>\n<p><span>\u8ba9\u6211\u4eec\u5411\u7ec4\u4ef6\u4e2d\u6dfb\u52a0\u4e00\u4e9b\u6570\u636e\u3002\u6211\u4eec\u5c06\u4f7f\u7528\u5355\u5411\u6570\u636e\u7ed1\u5b9a\u3002\u6211\u4eec\u9996\u5148\u663e\u793a\u53ea\u8bfb\u6570\u636e\uff0c\u7136\u540e\u4f7f\u5176\u53ef\u7f16\u8f91\u3002<\/span><\/p>\n<ol>\n<li><span>\u5728\u201c VS\u4ee3\u7801\u201d\u4e2d\uff0c\u5355\u51fb<\/span><code>helloWebComponent.html<\/code><span>\u4ee5\u5bf9\u5176\u8fdb\u884c\u7f16\u8f91\u3002\u66ff\u6362<\/span><code>&lt;h2&gt;Hello World!&lt;\/h2&gt;<\/code><span>\u4e3a<\/span><code>&lt;h2&gt;Hello {greeting}!&lt;\/h2&gt;<\/code><span>\u3002\u8fd9\u5c06\u4e3a<\/span><code>greeting<\/code><span>\u6211\u4eec\u5728\u4e0b\u4e00\u6b65\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u6dfb\u52a0\u7ed1\u5b9a\u3002<\/span><\/li>\n<li><span>\u7f16\u8f91<\/span><code>helloWebComponent.js<\/code><span>\u5176\u5185\u5bb9\u5e76\u66ff\u6362\u4e3a\u4ee5\u4e0b\u5185\u5bb9\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token class-name\">LightningElement<\/span> <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'lwc'<\/span><span class=\"token punctuation\">;<\/span>\nexport <span class=\"token keyword\">default<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">HelloWebComponent<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">LightningElement<\/span> <span class=\"token punctuation\">{<\/span>\n\tgreeting <span class=\"token operator\">=<\/span> <span class=\"token string\">'Trailblazer'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8fd9\u5c06\u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e00\u4e2a<\/span><code>greeting<\/code><span>\u5c5e\u6027\u3002\u6b64\u5c5e\u6027\u662f\u53cd\u5e94\u6027\u7684\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u53ea\u8981<\/span><code>greeting<\/code><span>\u66f4\u6539\u503c\uff0c\u7ec4\u4ef6\u7684HTML\u6a21\u677f\u5c31\u4f1a\u81ea\u52a8\u5237\u65b0\u3002<\/span><\/li>\n<li><span>\u5c06\u66f4\u65b0\u7684\u4ee3\u7801\u90e8\u7f72\u5230\u7ec4\u7ec7\u3002\u53f3\u952e\u5355\u51fb\u9ed8\u8ba4\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>SFDX\uff1a\u5c06\u6e90\u90e8\u7f72\u5230\u7ec4\u7ec7<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5728\u7ec4\u7ec7\u4e2d\uff0c\u5237\u65b0Ursus Park\u4e3b\u9875\uff0c\u5e76\u6ce8\u610f\u60a8\u7684\u7ec4\u4ef6\u5df2\u66f4\u6539\uff08\u5b83\u73b0\u5728\u663e\u793a\u201c Hello Trailblazer\uff01\u201d\u800c\u4e0d\u662f\u201c Hello World\uff01\u201d\uff09\u3002<\/span><\/li>\n<\/ol>\n<p><span>\u505a\u5f97\u597d\uff01\u60a8\u5df2\u7ecf\u5b9e\u73b0\u4e86\u6570\u636e\u7ed1\u5b9a\uff1a<\/span><code>greeting<\/code><span>\u8bfb\u53d6\u5e76\u663e\u793a\u4e86\u8be5\u5c5e\u6027\uff0c\u4f46\u662f\u7528\u6237\u6682\u65f6\u65e0\u6cd5\u4fee\u6539\u8be5\u5c5e\u6027\u3002<\/span><\/p>\n<p><span>\u8ba9\u6211\u4eec\u66f4\u8fdb\u4e00\u6b65\uff0c\u5e76\u901a\u8fc7\u6dfb\u52a0\u8f93\u5165\u5b57\u6bb5\u4f7f\u6570\u636e\u53ef\u7f16\u8f91\u3002<\/span><\/p>\n<ol>\n<li><span>\u5728VS Code\u4e2d\uff0c\u7f16\u8f91<\/span><code>helloWebComponent.html<\/code><span>\u5e76\u5728\u4e0b\u9762\u6dfb\u52a0\u4ee5\u4e0b\u884c<\/span><code>&lt;h2&gt;Hello {greeting}!&lt;\/h2&gt;<\/code><span>\uff1a<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token operator\">&lt;<\/span>lightning<span class=\"token operator\">-<\/span>input\nlabel<span class=\"token operator\">=<\/span><span class=\"token string\">\"Name\"<\/span>\nvalue<span class=\"token operator\">=<\/span><span class=\"token punctuation\">{<\/span>greeting<span class=\"token punctuation\">}<\/span>\nonchange<span class=\"token operator\">=<\/span><span class=\"token punctuation\">{<\/span>handleGreetingChange<span class=\"token punctuation\">}<\/span>\n<span class=\"token operator\">&gt;<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>lightning<span class=\"token operator\">-<\/span>input<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8fd9\u6bb5\u4ee3\u7801\u6dfb\u52a0\u4e86\u4e00\u4e2a\u7528SLDS\u6837\u5f0f\u5316\u7684\u6587\u672c\u8f93\u5165\u5b57\u6bb5\u3002\u8f93\u5165\u4f7f\u7528<\/span><code>greeting<\/code><span>\u5c5e\u6027\u521d\u59cb\u5316\u3002\u6bcf\u5f53\u8f93\u5165\u66f4\u6539\u65f6\uff0c\u5b83\u5c06\u8c03\u7528<\/span><code>handleGreetingChange<\/code><span>\u6211\u4eec\u5728\u4e0b\u4e00\u6b65\u4e2d\u5b9a\u4e49\u7684JavaScript\u51fd\u6570\u3002<\/span><\/li>\n<li><span>\u7f16\u8f91<\/span><code>helloWebComponent.js<\/code><span>\u5e76\u5728\u4e0b\u65b9\u6dfb\u52a0\u4ee5\u4e0b\u884c<\/span><code>greeting = 'Trailblazer';<\/code><span>\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token function\">handleGreetingChange<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n\t<span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>greeting <span class=\"token operator\">=<\/span> event<span class=\"token punctuation\">.<\/span>target<span class=\"token punctuation\">.<\/span>value<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8fd9\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4ece\u4e8b\u4ef6\uff08\u6765\u81ea\u8f93\u5165\u5b57\u6bb5\u7684\u8f93\u5165\u66f4\u6539\u4e8b\u4ef6\uff09\u4e2d\u6355\u83b7\u503c\u5e76\u5c06\u5176\u5206\u914d\u7ed9<\/span><code>greeting<\/code><span>\u5c5e\u6027\u3002<\/span><\/li>\n<li><span>\u5c06\u66f4\u65b0\u7684\u4ee3\u7801\u90e8\u7f72\u5230\u7ec4\u7ec7\u3002\u53f3\u952e\u5355\u51fb\u9ed8\u8ba4\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>SFDX\uff1a\u5c06\u6e90\u90e8\u7f72\u5230\u7ec4\u7ec7<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5728\u7ec4\u7ec7\u4e2d\uff0c\u5237\u65b0\u4e3b\u9875\uff0c\u5e76\u6ce8\u610f\u5728\u7f16\u8f91\u6587\u672c\u5b57\u6bb5\u65f6\u5982\u4f55\u7acb\u5373\u66f4\u65b0\u7ec4\u4ef6\u3002<\/span><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"image image-block image-center\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/b7e4dc5eb316a5dfeb63ee2c6088d409_cjqss-8-vvl-001-e-0-w-9-z-0202-olww.png\" alt=\"Ursus Park\u4e3b\u9875\u4e0a\u5177\u6709\u6570\u636e\u7ed1\u5b9a\u7684Lightning Web\u7ec4\u4ef6\" width=\"624\" height=\"233\" \/><\/p>\n<p><span>\u60a8\u5df2\u5efa\u7acb\u6570\u636e\u7ed1\u5b9a\uff0c\u5e76\u4f7f\u6570\u636e\u53ef\u7f16\u8f91\u3002<\/span><code>greeting<\/code><span>\u6bcf\u5f53\u60a8\u5728\u8f93\u5165\u5b57\u6bb5\u4e2d\u66f4\u6539\u5176\u503c\u65f6\uff0c\u8be5\u5c5e\u6027\u5c31\u4f1a\u663e\u793a\u5e76\u81ea\u52a8\u5237\u65b0\u3002<\/span><\/p>\n<p><span>\u663e\u793a\u5c5e\u6027\u53ea\u662f\u4e00\u4e2a\u5f00\u59cb\uff0c\u4f46\u662f\u5982\u679c\u9700\u8981\u5728\u5448\u73b0\u4e4b\u524d\u8f6c\u6362\u5176\u503c\u600e\u4e48\u529e\uff1fLightning Web Components\u4f7f\u60a8\u53ef\u4ee5\u4f7f\u7528\u8868\u8fbe\u5f0f\u3002<\/span><\/p>\n<h2 id=\"use-expressions\"><span>\u4f7f\u7528\u8868\u8fbe\u5f0f<\/span><\/h2>\n<p><span>\u8ba9\u6211\u4eec\u8fdb\u5165\u4e00\u4e9b\u66f4\u9ad8\u7ea7\u7684\u4e3b\u9898\uff0c\u5e76\u4f7f\u7528\u8868\u8fbe\u5f0f\u6765\u663e\u793a\u52a8\u6001\u503c\u3002\u6211\u4eec\u5c06\u6dfb\u52a0\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff0c\u8be5\u8868\u8fbe\u5f0f\u4ee5\u5927\u5199\u5b57\u6bcd\u8fd4\u56de\u60a8\u7684\u540d\u5b57\u7684\u95ee\u5019\u6d88\u606f\u3002<\/span><\/p>\n<ol>\n<li><span>\u5728VS Code\u4e2d\uff0c\u7f16\u8f91<\/span><code>helloWebComponent.html<\/code><span>\u5e76\u66ff\u6362<\/span><code>title=\"Lightning Web Component\"<\/code><span>\u4e3a<\/span><code>title={capitalizedGreeting}<\/code><span>\u3002<\/span><\/li>\n<li><span>\u66ff\u6362<\/span><code>&lt;h2&gt;Hello {greeting}!&lt;\/h2&gt;<\/code><span>\u4e3a<\/span><code>&lt;p&gt;Today is {currentDate}&lt;\/p&gt;<\/code><span>\u3002<\/span><\/li>\n<li><span>\u7f16\u8f91<\/span><code>helloWebComponent.js<\/code><span>\u5e76\u5728<\/span><code>handleGreetingChange<\/code><span>\u529f\u80fd\u5757\u4e0a\u65b9\u6dfb\u52a0\u4ee5\u4e0b\u51e0\u884c\u3002<\/span>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">currentDate <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Date<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toDateString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\nget <span class=\"token function\">capitalizedGreeting<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n\t<span class=\"token keyword\">return<\/span> `<span class=\"token class-name\">Hello<\/span> $<span class=\"token punctuation\">{<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>greeting<span class=\"token punctuation\">.<\/span><span class=\"token function\">toUpperCase<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><span class=\"token operator\">!<\/span>`<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<p><span>\u8fd9\u5b9a\u4e49\u4e86\u4e00\u4e2a<\/span><code>currentDate<\/code><span>\u7c7b\u5c5e\u6027\u548c\u4e00\u4e2a<\/span><code>capitalizedGreeting<\/code><span>getter\u51fd\u6570\u3002\u8fd9\u4e9bgetter\u51fd\u6570\u79f0\u4e3a\u8868\u8fbe\u5f0f\u3002\u5b83\u4eec\u7528\u4e8e\u663e\u793a\u503c\uff0c\u5c31\u50cf\u5c5e\u6027\u4e00\u6837\uff0c\u4f46\u662f\u8868\u8fbe\u5f0f\u503c\u53ef\u4ee5\u57fa\u4e8e\u51fd\u6570\u4e2d\u7f16\u5199\u7684\u67d0\u4e9b\u903b\u8f91\u6765\u8ba1\u7b97\u3002\u4e0e\u5c5e\u6027\u4e0d\u540c\uff0c\u8868\u8fbe\u5f0f\u4e0d\u662f\u88ab\u52a8\u7684\uff1a\u6bcf\u6b21\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\u65f6\uff0c\u8868\u8fbe\u5f0f\u90fd\u4f1a\u81ea\u52a8\u91cd\u65b0\u8bc4\u4f30\u3002\u65e0\u8bba\u5176\u503c\u662f\u5426\u66f4\u6539\uff0c\u8fd9\u90fd\u662f\u6b63\u786e\u7684\u3002\u5f53\u7528\u6237\u5728\u7ec4\u4ef6\u7684\u8f93\u5165\u4e2d\u952e\u5165\u5185\u5bb9\u65f6\uff0c<\/span><code>handleGreetingChange<\/code><span>\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u51fd\u6570\u5c06\u66f4\u65b0<\/span><code>greeting<\/code><span>\u5c5e\u6027\u7684\u503c\u3002\u7531\u4e8e<\/span><code>greeting<\/code><span>\u662f\u53cd\u5e94\u6027\u7684\uff0c\u56e0\u6b64\u4f1a\u89e6\u53d1\u91cd\u65b0\u6e32\u67d3\uff0c\u4ece\u800c\u8feb\u4f7f\u8868\u8fbe\u5f0f\u91cd\u65b0\u8bc4\u4f30\u3002\u8bf7\u6ce8\u610f\uff0c\u6211\u4eec\u58f0\u660e\u4e86<\/span><code>currentDate<\/code><span>class\u5c5e\u6027\uff0c\u7528\u4e8e\u4fdd\u5b58\u548c\u663e\u793a\u5f53\u524d\u65e5\u671f\uff0c\u800c\u4e0d\u4f7f\u7528\u8868\u8fbe\u5f0f\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528just\u7f16\u5199\u8868\u8fbe\u5f0f\uff0c<\/span><code>return new Date().toDateString();<\/code><span>\u4f46\u662f\u4f7f\u7528\u5c5e\u6027\u7684\u597d\u5904\u662f\u4e0d\u5fc5<\/span><code>Date<\/code><span>\u4e3a\u6bcf\u4e2a\u91cd\u65b0\u6e32\u67d3\u521b\u5efa\u65b0\u5bf9\u8c61\u3002<\/span><\/li>\n<li><span>\u5c06\u66f4\u65b0\u7684\u4ee3\u7801\u90e8\u7f72\u5230\u7ec4\u7ec7\u3002\u53f3\u952e\u5355\u51fb\u9ed8\u8ba4\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5355\u51fb<\/span><strong><span>SFDX\uff1a\u5c06\u6e90\u90e8\u7f72\u5230\u7ec4\u7ec7<\/span><\/strong><span>\u3002<\/span><\/li>\n<li><span>\u5728\u7ec4\u7ec7\u4e2d\uff0c\u5237\u65b0\u201c\u4e3b\u9875\u201d\u5e76\u6ce8\u610f\u8868\u8fbe\u5f0f\u7684\u663e\u793a\u65b9\u5f0f\u3002<\/span><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"image image-block image-center\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/f_auto,fl_lossy,q_70\/learn\/projects\/lwc-build-flexible-apps\/hello-world\/images\/936b572808e2e208c5c69843533a478f_cjqss-8-vvn-001-f-0-w-9-zjp-7-xomsw.png\" alt=\"\u5728Ursus Park\u4e3b\u9875\u4e0a\u5e26\u6709\u8868\u8fbe\u5f0f\u7684Lightning Web\u7ec4\u4ef6\" width=\"624\" height=\"235\" \/><\/p>\n<p><span>\u5982\u60a8\u6240\u89c1\uff0c\u8868\u8fbe\u5f0f\u4f7f\u6211\u4eec\u80fd\u591f\u4f7f\u7ec4\u4ef6\u6a21\u677f\u4fdd\u6301\u903b\u8f91\u6e05\u6670\u3002\u5b9e\u9645\u4e0a\uff0c\u4f7f\u7528\u8868\u8fbe\u5f0f\u662f\u5728\u663e\u793a\u5c5e\u6027\u503c\u4e4b\u524d\u5bf9\u5176\u8fdb\u884c\u8f6c\u6362\u7684\u552f\u4e00\u65b9\u6cd5\u3002<\/span><\/p>\n<p><span>\u8fd9\u5c31\u662f\u6b65\u9aa4\u3002\u60a8\u5df2\u7ecf\u5efa\u7acb\u4e86\u5e26\u6709\u57fa\u672c\u7ec4\u4ef6\uff0c\u6570\u636e\u7ed1\u5b9a\u548c\u8868\u8fbe\u5f0f\u7684\u57fa\u672chello world\u7ec4\u4ef6\u3002<\/span><\/p>\n<p><span>\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u6db5\u76d6\u4e86\u57fa\u7840\u77e5\u8bc6\uff0c\u8ba9\u6211\u4eec\u7ee7\u7eed\u8fdb\u884c\u4e00\u4e9b\u66f4\u4ee4\u4eba\u5174\u594b\u7684\u4e8b\u60c5\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u76ee\u6807 \u5728\u6b64\u9879\u76ee\u4e2d\uff0c\u60a8\u5c06\uff1a \u6784\u5efa\u4e00\u7ec4\u7b80\u5355\u7684Lightning Web\u7ec4\u4ef6\u3002 \u4ece\u5355\u4e2a\u8bb0\u5f55\uff0c\u7136\u540e\u4ece\u8bb0\u5f55\u5217\u8868\u4e2d\u68c0\u7d22 &hellip; <a href=\"http:\/\/www.ponybai.com\/?p=3294\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u4f7f\u7528Lightning Web\u7ec4\u4ef6\u6784\u5efaBear-tracking\u5e94\u7528\u7a0b\u5e8f &#8211; \u521b\u5efa\u4e00\u4e2aHello World Lightning Web\u7ec4\u4ef6<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":3295,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97],"tags":[],"class_list":["post-3294","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lightning-webbear-tracking"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528Lightning Web\u7ec4\u4ef6\u6784\u5efaBear-tracking\u5e94\u7528\u7a0b\u5e8f - \u521b\u5efa\u4e00\u4e2aHello World Lightning Web\u7ec4\u4ef6 - \u767d\u767d\u968f\u7b14<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.ponybai.com\/?p=3294\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" 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