{"id":12068,"date":"2023-11-28T22:42:05","date_gmt":"2023-11-28T14:42:05","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12068"},"modified":"2023-11-30T17:46:24","modified_gmt":"2023-11-30T09:46:24","slug":"javascript-zhongheyou-shen-me-qu-bie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhongheyou-shen-me-qu-bie\/","title":{"rendered":"JavaScript \u4e2d==\u548c===\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c<code>==<\/code> \u548c <code>===<\/code> \u90fd\u662f\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u64cd\u4f5c\u7b26\uff0c\u4f46\u5b83\u4eec\u6709\u7740\u4e0d\u540c\u7684\u884c\u4e3a\uff1a<\/p>\n<h3><a id=\"%EF%BC%88%E7%9B%B8%E7%AD%89%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>==<\/code>\uff08\u76f8\u7b49\u8fd0\u7b97\u7b26\uff09\uff1a<\/h3>\n<p><code>==<\/code> \u88ab\u79f0\u4e3a\u76f8\u7b49\u8fd0\u7b97\u7b26\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u662f\u5426\u76f8\u7b49\u3002\u5b83\u5728\u6bd4\u8f83\u4e4b\u524d\u4f1a\u5c1d\u8bd5\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff0c\u4f7f\u5f97\u4e24\u4e2a\u503c\u7684\u7c7b\u578b\u76f8\u540c\uff0c\u7136\u540e\u518d\u8fdb\u884c\u6bd4\u8f83\u3002\u8fd9\u79cd\u7c7b\u578b\u8f6c\u6362\u7684\u884c\u4e3a\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u610f\u60f3\u4e0d\u5230\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><code>0 == false<\/code> \u8fd4\u56de <code>true<\/code>\uff0c\u56e0\u4e3a\u5728\u8fdb\u884c\u6bd4\u8f83\u65f6\uff0cJavaScript \u4f1a\u5c06\u5e03\u5c14\u503c <code>false<\/code> \u8f6c\u6362\u4e3a\u6570\u5b57 <code>0<\/code>\u3002<\/li>\n<li><code>'' == false<\/code> \u8fd4\u56de <code>true<\/code>\uff0c\u56e0\u4e3a JavaScript \u4f1a\u5c06\u7a7a\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c <code>false<\/code>\uff0c\u7136\u540e\u518d\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u5b57 <code>0<\/code>\u3002<\/li>\n<\/ul>\n<h3><a id=\"%EF%BC%88%E4%B8%A5%E6%A0%BC%E7%9B%B8%E7%AD%89%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>===<\/code>\uff08\u4e25\u683c\u76f8\u7b49\u8fd0\u7b97\u7b26\uff09\uff1a<\/h3>\n<p><code>===<\/code> \u88ab\u79f0\u4e3a\u4e25\u683c\u76f8\u7b49\u8fd0\u7b97\u7b26\uff0c\u5b83\u4e0d\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3002\u53ea\u6709\u5f53\u4e24\u4e2a\u503c\u7684\u7c7b\u578b\u548c\u503c\u90fd\u76f8\u7b49\u65f6\uff0c\u624d\u4f1a\u8fd4\u56de <code>true<\/code>\uff1b\u5426\u5219\u8fd4\u56de <code>false<\/code>\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><code>0 === false<\/code> \u8fd4\u56de <code>false<\/code>\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u7c7b\u578b\u4e0d\u540c\uff08\u4e00\u4e2a\u662f\u6570\u5b57\uff0c\u4e00\u4e2a\u662f\u5e03\u5c14\u503c\uff09\u3002<\/li>\n<li><code>'' === false<\/code> \u8fd4\u56de <code>false<\/code>\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u7c7b\u578b\u4e0d\u540c\uff08\u4e00\u4e2a\u662f\u5b57\u7b26\u4e32\uff0c\u4e00\u4e2a\u662f\u5e03\u5c14\u503c\uff09\u3002<\/li>\n<\/ul>\n<p>\u5728\u5b9e\u9645\u7f16\u7801\u4e2d\uff0c\u63a8\u8350\u5c3d\u91cf\u4f7f\u7528 <code>===<\/code> \u8fd0\u7b97\u7b26\u8fdb\u884c\u6bd4\u8f83\uff0c\u56e0\u4e3a\u5b83\u66f4\u4e25\u683c\uff0c\u53ef\u4ee5\u907f\u514d\u7c7b\u578b\u8f6c\u6362\u5e26\u6765\u7684\u610f\u5916\u7ed3\u679c\u3002<code>==<\/code> \u8fd0\u7b97\u7b26\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u5f15\u53d1\u6df7\u6dc6\u548c\u96be\u4ee5\u9884\u6599\u7684\u884c\u4e3a\uff0c\u56e0\u6b64\u8c28\u614e\u4f7f\u7528\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c== \u548c === \u90fd\u662f\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u64cd\u4f5c\u7b26\uff0c\u4f46\u5b83\u4eec\u6709\u7740\u4e0d\u540c\u7684\u884c\u4e3a\uff1a ==\uff08\u76f8\u7b49 [&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-12068","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12068","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=12068"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12068\/revisions"}],"predecessor-version":[{"id":13608,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12068\/revisions\/13608"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12068"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}