{"id":6195,"date":"2024-02-01T14:24:42","date_gmt":"2024-02-01T06:24:42","guid":{"rendered":"https:\/\/www.citerp.com.tw\/citwordpress\/?p=6195"},"modified":"2024-02-01T14:24:47","modified_gmt":"2024-02-01T06:24:47","slug":"javascript-var-let-const","status":"publish","type":"post","link":"https:\/\/www.citerp.com.tw\/citwordpress\/javascript-var-let-const\/","title":{"rendered":"JavaScript var let const"},"content":{"rendered":"\n<p>\u4e00\u822c\u4f86\u8aaa\uff0c\u6211\u5011\u5728\u5ba3\u544a\u8b8a\u6578\u7684\u6642\u5019\uff0c\u4f9d\u64da\u5b58\u6d3b\u7bc4\u570d\u53ef\u4ee5\u5340\u5206\u70ba\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li class=\"\"><strong>\u5168\u57df\u8b8a\u6578 (Global Variable)<\/strong><\/li><li class=\"\"><strong>\u5340\u57df\u8b8a\u6578 (Local Variable)<\/strong><\/li><\/ul>\n\n\n\n<ul class=\"wp-block-list\"><li><strong><code>var<\/code>: \u662f\u300c\u53ef\u300d\u91cd\u8907\u5ba3\u544a\u76f8\u540c\u8b8a\u6578\uff0c\u5340\u584a\u8a9e\u6cd5\u7528<code>var<\/code>\u5ba3\u544a\u53ef\u80fd\u6703\u611f\u67d3\u5168\u57df\u8b8a\u6578\u3002<\/strong><\/li><li><strong><code>let<\/code>: \u662f\u300c\u4e0d\u53ef\u300d\u91cd\u8907\u5ba3\u544a\u76f8\u540c\u8b8a\u6578\uff0c\u5176\u4f5c\u7528\u57df\u50c5\u5728\u300c<em>\u5340\u584a\u4f5c\u7528\u57df(Block Scope)<\/em>\u300d\uff0c\u4e00\u65e6\u96e2\u958b\u5247\u6703\u7121\u4f5c\u7528\uff0c\u986f\u793a\u7121\u5b9a\u7fa9\u3002<\/strong><\/li><li><strong><code>const<\/code>: \u7279\u6027\u540c<code>let<\/code>\uff0c\u4f46\u66f4\u56b4\u8b39\u3002\u4e00\u65e6\u8b8a\u6578\u5ba3\u544a\u70ba\u5e38\u6578\u5f8c\uff0c\u5247\u7121\u6cd5\u518d\u8ce6\u65b0\u503c\u3002<\/strong><\/li><\/ul>\n\n\n\n<p>\u6211\u7684\u8a18\u6cd5\u5c31\u662f\uff0c\u6bcf\u500b\u5730\u65b9\u8981\u7528\u5230\u5c31\u5ba3\u544avar<\/p>\n\n\n\n<p>\u5c40\u90e8\u51fd\u6578\u7528\u5230\u5c31\u5ba3\u544alet<\/p>\n\n\n\n<p>\u4e0d\u60f3\u6539\u52d5\u7684\u5c31\u5ba3\u544aconst<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript var let const<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"qubely_global_settings":"","qubely_interactions":"","footnotes":""},"categories":[79],"tags":[80],"class_list":["post-6195","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-javascript"],"qubely_featured_image_url":null,"qubely_author":{"display_name":"\u5eb7\u6377Qoo","author_link":"https:\/\/www.citerp.com.tw\/citwordpress\/author\/cit001\/"},"qubely_comment":0,"qubely_category":"<a href=\"https:\/\/www.citerp.com.tw\/citwordpress\/category\/javascript\/\" rel=\"category tag\">JavaScript<\/a>","qubely_excerpt":"JavaScript var let const","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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