{"id":11686,"date":"2023-11-28T22:30:30","date_gmt":"2023-11-28T14:30:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11686"},"modified":"2023-11-30T18:47:19","modified_gmt":"2023-11-30T10:47:19","slug":"javascript-zhong-wei-shen-me-zai-diao-yong-zhe-ge","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-wei-shen-me-zai-diao-yong-zhe-ge\/","title":{"rendered":"JavaScript \u4e2d\u4e3a\u4ec0\u4e48\u5728\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\uff0c\u4ee3\u7801\u4e2d\u7684 b \u4f1a\u53d8\u6210\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\uff1f"},"content":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u5982\u679c\u5728\u51fd\u6570\u5185\u6ca1\u6709\u4f7f\u7528 <code>var<\/code>\u3001<code>let<\/code> \u6216 <code>const<\/code> \u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\uff0c\u800c\u76f4\u63a5\u5bf9\u53d8\u91cf\u8d4b\u503c\uff0cJavaScript \u4f1a\u5c06\u8fd9\u4e2a\u53d8\u91cf\u9ed8\u8ba4\u58f0\u660e\u4e3a\u5168\u5c40\u53d8\u91cf\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-javascript\">function test() {\n  b = 10; \/\/ \u6ca1\u6709\u4f7f\u7528 var\u3001let \u6216 const \u58f0\u660e\u53d8\u91cf b\n}\n\ntest();\nconsole.log(b); \/\/ \u8f93\u51fa\uff1a10\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c<code>b<\/code> \u88ab\u8d4b\u503c\u4f46\u6ca1\u6709\u4f7f\u7528 <code>var<\/code> \u6216\u5176\u4ed6\u58f0\u660e\u5173\u952e\u5b57\uff0c\u56e0\u6b64\u5b83\u88ab\u89c6\u4e3a\u5168\u5c40\u53d8\u91cf\u3002\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u53d8\u91cf <code>b<\/code> \u7684\u8d4b\u503c\u4f1a\u6539\u53d8\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u7684 <code>b<\/code> \u53d8\u91cf\u7684\u503c\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u610f\u5916\u521b\u5efa\u5168\u5c40\u53d8\u91cf\uff0c\u5efa\u8bae\u59cb\u7ec8\u4f7f\u7528 <code>var<\/code>\u3001<code>let<\/code> \u6216 <code>const<\/code> \u6765\u58f0\u660e\u53d8\u91cf\uff0c\u7279\u522b\u662f\u5728\u51fd\u6570\u5185\u90e8\u3002\u8fd9\u6837\u53ef\u4ee5\u660e\u786e\u53d8\u91cf\u7684\u4f5c\u7528\u57df\uff0c\u907f\u514d\u610f\u5916\u4fee\u6539\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u5982\u679c\u5728\u51fd\u6570\u5185\u6ca1\u6709\u4f7f\u7528 var\u3001let \u6216 const \u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\uff0c\u800c\u76f4\u63a5\u5bf9\u53d8 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-11686","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11686","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=11686"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11686\/revisions"}],"predecessor-version":[{"id":13651,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11686\/revisions\/13651"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11686"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}