{"id":8333,"date":"2023-11-28T20:25:13","date_gmt":"2023-11-28T12:25:13","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8333"},"modified":"2023-12-02T22:34:15","modified_gmt":"2023-12-02T14:34:15","slug":"vue-zhongjs-zhonglet-heconst-you-shen-me-yong","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhongjs-zhonglet-heconst-you-shen-me-yong\/","title":{"rendered":"Vue \u4e2d JS\u4e2d let \u548c const \u6709\u4ec0\u4e48\u7528\uff1f"},"content":{"rendered":"<p><code>let<\/code> \u548c <code>const<\/code> \u662f ES6\uff08ECMAScript 2015\uff09\u4e2d\u5f15\u5165\u7684\u7528\u4e8e\u58f0\u660e\u53d8\u91cf\u7684\u5173\u952e\u5b57\u3002<\/p>\n<h3><a id=\"let%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>let\uff1a<\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> \u58f0\u660e\u4e00\u4e2a\u5757\u7ea7\u4f5c\u7528\u57df\u7684\u53d8\u91cf\uff0c\u5728\u58f0\u660e\u540e\u53ef\u4ee5\u91cd\u65b0\u8d4b\u503c\u3002<\/li>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u53d8\u91cf\u7684\u503c\u53ef\u4ee5\u4fee\u6539\uff0c\u4e14\u5b58\u5728\u5757\u7ea7\u4f5c\u7528\u57df\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong><\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">let count = 10;\ncount = 20; \/\/ \u53ef\u4ee5\u91cd\u65b0\u8d4b\u503c\n<\/code><\/pre>\n<h3><a id=\"const%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>const\uff1a<\/h3>\n<ul>\n<li><strong>\u7528\u9014\uff1a<\/strong> \u58f0\u660e\u4e00\u4e2a\u5757\u7ea7\u4f5c\u7528\u57df\u7684\u5e38\u91cf\uff0c\u4e00\u65e6\u8d4b\u503c\u5c31\u4e0d\u80fd\u518d\u6539\u53d8\u3002<\/li>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u58f0\u660e\u7684\u53d8\u91cf\u5fc5\u987b\u5728\u5b9a\u4e49\u65f6\u521d\u59cb\u5316\uff0c\u4e14\u4e0d\u53ef\u91cd\u65b0\u8d4b\u503c\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong><\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">const PI = 3.14;\n\/\/ PI = 3.1416; \/\/ \u4f1a\u62a5\u9519\uff0c\u5e38\u91cf\u4e0d\u53ef\u91cd\u65b0\u8d4b\u503c\n<\/code><\/pre>\n<h3><a id=\"%E4%BD%BF%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u4f7f\u7528\u573a\u666f\uff1a<\/h3>\n<ul>\n<li><strong>let\uff1a<\/strong> \u9002\u5408\u9700\u8981\u91cd\u65b0\u8d4b\u503c\u7684\u53d8\u91cf\uff0c\u4e14\u9700\u8981\u5728\u4e0d\u540c\u4f5c\u7528\u57df\u5185\u4f7f\u7528\u7684\u60c5\u51b5\u3002<\/li>\n<li><strong>const\uff1a<\/strong> \u9002\u5408\u5b9a\u4e49\u5e38\u91cf\uff0c\u503c\u4e0d\u4f1a\u53d8\u5316\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ul>\n<p>\u4f7f\u7528 <code>let<\/code> \u548c <code>const<\/code> \u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\uff0c\u5e76\u4e14\u6709\u52a9\u4e8e\u907f\u514d\u610f\u5916\u7684\u53d8\u91cf\u4fee\u6539\uff0c\u4f46\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u58f0\u660e\u65b9\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>let \u548c const \u662f ES6\uff08ECMAScript 2015\uff09\u4e2d\u5f15\u5165\u7684\u7528\u4e8e\u58f0\u660e\u53d8\u91cf\u7684\u5173\u952e\u5b57\u3002 let\uff1a  [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-8333","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8333","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8333"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8333\/revisions"}],"predecessor-version":[{"id":14097,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8333\/revisions\/14097"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8333"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}