{"id":149,"date":"2024-12-10T23:30:21","date_gmt":"2024-12-10T15:30:21","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=149"},"modified":"2024-12-10T23:30:21","modified_gmt":"2024-12-10T15:30:21","slug":"%e5%85%a8%e5%b1%80%e5%8f%98%e9%87%8f%e5%9c%a8-javascript-%e4%b8%ad%e8%a2%ab%e8%ae%a4%e4%b8%ba%e6%98%af%e6%9c%89%e5%ae%b3%e7%9a%84%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2024\/12\/10\/%e5%85%a8%e5%b1%80%e5%8f%98%e9%87%8f%e5%9c%a8-javascript-%e4%b8%ad%e8%a2%ab%e8%ae%a4%e4%b8%ba%e6%98%af%e6%9c%89%e5%ae%b3%e7%9a%84%e5%90%97%ef%bc%9f\/","title":{"rendered":"\u5168\u5c40\u53d8\u91cf\u5728 JavaScript \u4e2d\u88ab\u8ba4\u4e3a\u662f\u6709\u5bb3\u7684\u5417\uff1f"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5168\u5c40\u53d8\u91cf\u5728 JavaScript \u4e2d\u88ab\u8ba4\u4e3a\u662f\u6709\u5bb3\u7684\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5b83\u4eec\u4f1a\u5e26\u6765\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u547d\u540d\u51b2\u7a81<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168\u5c40\u53d8\u91cf\u662f\u5171\u4eab\u7684\uff0c\u4efb\u4f55\u4ee3\u7801\u90fd\u53ef\u4ee5\u8bbf\u95ee\u6216\u4fee\u6539\u5b83\u3002\u5982\u679c\u591a\u4e2a\u811a\u672c\u6216\u6a21\u5757\u4f7f\u7528\u4e86\u76f8\u540c\u7684\u5168\u5c40\u53d8\u91cf\u540d\uff0c\u4f1a\u5bfc\u81f4\u51b2\u7a81\uff0c\u9020\u6210\u610f\u5916\u7684\u884c\u4e3a\u3002<\/li>\n\n\n\n<li>\u4f8b\u5982\uff1a<br><code>javascript var user = \"Alice\"; function updateUser() { user = \"Bob\"; \/\/ \u4fee\u6539\u4e86\u5168\u5c40\u53d8\u91cf } console.log(user); \/\/ \u53ef\u80fd\u8f93\u51fa\u610f\u6599\u4e4b\u5916\u7684\u503c<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u96be\u4ee5\u7ef4\u62a4<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168\u5c40\u53d8\u91cf\u4f1a\u5bfc\u81f4\u4ee3\u7801\u7684\u903b\u8f91\u53d8\u5f97\u590d\u6742\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ef\u4ee5\u5728\u7a0b\u5e8f\u7684\u4efb\u4f55\u5730\u65b9\u88ab\u66f4\u6539\u3002<\/li>\n\n\n\n<li>\u5f53\u95ee\u9898\u53d1\u751f\u65f6\uff0c\u5f88\u96be\u8ffd\u8e2a\u5230\u662f\u54ea\u4e00\u90e8\u5206\u4ee3\u7801\u4fee\u6539\u4e86\u5168\u5c40\u53d8\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>\u589e\u52a0\u8c03\u8bd5\u96be\u5ea6<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7531\u4e8e\u5168\u5c40\u53d8\u91cf\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u88ab\u8bbf\u95ee\u6216\u4fee\u6539\uff0c\u8c03\u8bd5\u65f6\u53ef\u80fd\u9700\u8981\u68c0\u67e5\u591a\u4e2a\u6587\u4ef6\u6216\u6a21\u5757\u624d\u80fd\u627e\u5230\u95ee\u9898\u7684\u6839\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u6c61\u67d3\u5168\u5c40\u547d\u540d\u7a7a\u95f4<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JavaScript \u7684\u5168\u5c40\u5bf9\u8c61\uff08\u5728\u6d4f\u89c8\u5668\u4e2d\u662f <code>window<\/code>\uff09\u5305\u542b\u4e86\u8bb8\u591a\u9ed8\u8ba4\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5982\u679c\u968f\u610f\u589e\u52a0\u5168\u5c40\u53d8\u91cf\uff0c\u5f88\u5bb9\u6613\u8986\u76d6\u8fd9\u4e9b\u9ed8\u8ba4\u7684\u529f\u80fd\u3002<\/li>\n\n\n\n<li>\u4f8b\u5982\uff1a<br><code>javascript var location = \"New York\"; \/\/ \u8986\u76d6\u4e86 window.location console.log(location); \/\/ \"New York\"\uff0c\u800c\u4e0d\u662f\u6d4f\u89c8\u5668\u7684 location \u5bf9\u8c61<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong>\u96be\u4ee5\u6a21\u5757\u5316<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u73b0\u4ee3\u5e94\u7528\u7a0b\u5e8f\u901a\u5e38\u5206\u4e3a\u591a\u4e2a\u6a21\u5757\uff0c\u5982\u679c\u8fc7\u5ea6\u4f9d\u8d56\u5168\u5c40\u53d8\u91cf\uff0c\u4f1a\u4f7f\u6a21\u5757\u4e4b\u95f4\u8026\u5408\u6027\u589e\u52a0\uff0c\u96be\u4ee5\u5b9e\u73b0\u72ec\u7acb\u548c\u590d\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6. <strong>\u5bb9\u6613\u5f15\u53d1\u5b89\u5168\u95ee\u9898<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168\u5c40\u53d8\u91cf\u53ef\u4ee5\u88ab\u4efb\u4f55\u4ee3\u7801\u8bbf\u95ee\u6216\u4fee\u6539\uff0c\u5305\u62ec\u6076\u610f\u4ee3\u7801\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u6cc4\u9732\u6216\u529f\u80fd\u5931\u6548\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u51cf\u5c11\u5168\u5c40\u53d8\u91cf\u7684\u89e3\u51b3\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u7528\u5c40\u90e8\u53d8\u91cf<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u8fc7 <code>let<\/code> \u6216 <code>const<\/code> \u58f0\u660e\u53d8\u91cf\uff0c\u9650\u5236\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u3002<br><code>javascript function myFunction() { let localVar = \"I'm local\"; console.log(localVar); }<\/code><\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u7528\u95ed\u5305<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06\u53d8\u91cf\u5c01\u88c5\u5728\u4e00\u4e2a\u51fd\u6570\u4f5c\u7528\u57df\u5185\u3002<br><code>javascript (function() { let privateVar = \"I'm private\"; console.log(privateVar); })();<\/code><\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u7528\u6a21\u5757<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u6a21\u5757\u5316\u7684\u5de5\u5177\uff08\u5982 ES Modules\u3001CommonJS \u7b49\uff09\u7ba1\u7406\u53d8\u91cf\uff0c\u907f\u514d\u5168\u5c40\u53d8\u91cf\u3002<br><code>javascript \/\/ module.js export const myVar = \"Hello, Module!\";<\/code><\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u7528\u547d\u540d\u7a7a\u95f4<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06\u53d8\u91cf\u7ec4\u7ec7\u5728\u4e00\u4e2a\u5bf9\u8c61\u4e2d\uff0c\u51cf\u5c11\u76f4\u63a5\u6c61\u67d3\u5168\u5c40\u547d\u540d\u7a7a\u95f4\u3002<br><code>javascript const MyApp = {}; MyApp.config = { apiUrl: \"https:\/\/example.com\/api\", };<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5168\u5c40\u53d8\u91cf\u5bb9\u6613\u5bfc\u81f4\u547d\u540d\u51b2\u7a81\u3001\u7ef4\u62a4\u56f0\u96be\u3001\u8c03\u8bd5\u590d\u6742\u7b49\u95ee\u9898\uff0c\u56e0\u6b64\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b83\u4eec\uff0c\u800c\u662f\u901a\u8fc7\u5c40\u90e8\u53d8\u91cf\u3001\u6a21\u5757\u5316\u7b49\u65b9\u5f0f\u7ba1\u7406\u4ee3\u7801\u7684\u4f5c\u7528\u57df\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5168\u5c40\u53d8\u91cf\u5728 JavaScript \u4e2d\u88ab\u8ba4\u4e3a\u662f\u6709\u5bb3\u7684\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5b83\u4eec\u4f1a\u5e26\u6765\u4ee5\u4e0b\u95ee\u9898\uff1a 1. \u547d\u540d\u51b2\u7a81 2. \u96be\u4ee5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-149","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=149"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/149\/revisions"}],"predecessor-version":[{"id":150,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/149\/revisions\/150"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}