{"id":7628,"date":"2023-11-28T19:48:56","date_gmt":"2023-11-28T11:48:56","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7628"},"modified":"2023-12-01T22:14:04","modified_gmt":"2023-12-01T14:14:04","slug":"vue-zhongjs-zhong-pan-duan-shu-ju-lei-xing-de-fang","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhongjs-zhong-pan-duan-shu-ju-lei-xing-de-fang\/","title":{"rendered":"Vue \u4e2d JS \u4e2d\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u6709\u51e0\u79cd\uff1f"},"content":{"rendered":"

\u5728 JavaScript \u4e2d\uff0c\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5176\u4e2d\u5e38\u89c1\u7684\u5305\u62ec\uff1a<\/p>\n

    \n
  1. \n

    typeof \u8fd0\u7b97\u7b26<\/strong>\uff1atypeof<\/code> \u662f\u4e00\u79cd\u6700\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5224\u65ad\u53d8\u91cf\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

    typeof 42; \/\/ "number"\ntypeof "hello"; \/\/ "string"\ntypeof true; \/\/ "boolean"\ntypeof undefined; \/\/ "undefined"\ntypeof null; \/\/ "object"\uff08\u8fd9\u662f typeof \u7684\u4e00\u4e2a\u5386\u53f2 bug\uff09\ntypeof {}; \/\/ "object"\ntypeof []; \/\/ "object"\ntypeof function(){}; \/\/ "function"\n<\/code><\/pre>\n<\/li>\n
  2. \n
    Object.prototype.toString.call() \u65b9\u6cd5<\/strong>\uff1a\u5229\u7528 Object.prototype.toString<\/code> \u65b9\u6cd5\u68c0\u6d4b\u6570\u636e\u7c7b\u578b\u3002<\/p>\n
    Object.prototype.toString.call(42); \/\/ "[object Number]"\nObject.prototype.toString.call("hello"); \/\/ "[object String]"\nObject.prototype.toString.call(true); \/\/ "[object Boolean]"\nObject.prototype.toString.call(undefined); \/\/ "[object Undefined]"\nObject.prototype.toString.call(null); \/\/ "[object Null]"\nObject.prototype.toString.call({}); \/\/ "[object Object]"\nObject.prototype.toString.call([]); \/\/ "[object Array]"\nObject.prototype.toString.call(function(){}); \/\/ "[object Function]"\n<\/code><\/pre>\n<\/li>\n
  3. \n
    instanceof \u8fd0\u7b97\u7b26<\/strong>\uff1ainstanceof<\/code> \u53ef\u4ee5\u5224\u65ad\u5bf9\u8c61\u7684\u7c7b\u578b\uff0c\u7528\u6765\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u4e2a\u6784\u9020\u51fd\u6570\u7684\u5b9e\u4f8b\u3002<\/p>\n
    [] instanceof Array; \/\/ true\n{} instanceof Object; \/\/ true\nfunction(){} instanceof Function; \/\/ true\n<\/code><\/pre>\n<\/li>\n
  4. \n
    Array.isArray() \u65b9\u6cd5<\/strong>\uff1a\u7528\u4e8e\u5224\u65ad\u662f\u5426\u4e3a\u6570\u7ec4\u7c7b\u578b\u3002<\/p>\n
    Array.isArray([]); \/\/ true\nArray.isArray({}); \/\/ false\n<\/code><\/pre>\n<\/li>\n<\/ol>\n
    \u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u7279\u70b9\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u573a\u666f\u548c\u9700\u8981\u6765\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u8fdb\u884c\u6570\u636e\u7c7b\u578b\u7684\u5224\u65ad\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728 JavaScript \u4e2d\uff0c\u5224\u65ad\u6570\u636e\u7c7b\u578b\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5176\u4e2d\u5e38\u89c1\u7684\u5305\u62ec\uff1a typeof \u8fd0\u7b97\u7b26\uff1atypeof  […]<\/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-7628","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7628","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=7628"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7628\/revisions"}],"predecessor-version":[{"id":13928,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7628\/revisions\/13928"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=7628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=7628"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=7628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}