见代码：

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>Object</title>

 </head>

 <body>

 <script type="text/javascript">

     //        let obj = {};

     //        let arr = [];

     var obj = {};

     var arr = [];

     console.log(typeof obj);//object

     console.log(typeof arr);//object

     console.log(typeof null);//object

     console.log(typeof '');//string

     console.log(typeof undefined);//undefined

     console.log('*******************************************');

     console.log(typeof obj === 'object');//true

     console.log(typeof arr === 'object');//true

     console.log(typeof null === 'object');//true

     console.log(typeof '' === 'object');//false

     console.log(typeof undefined === 'object');//false

     console.log('*******************************************');

     console.log("typeof obj === 'object':" + typeof obj === 'object');//false

     console.log("typeof arr === 'object':" + typeof arr === 'object');//false

     console.log("typeof null === 'object':" + typeof null === 'object');//false

     console.log("typeof '' === 'object':" + typeof '' === 'object');//false

     console.log("typeof undefined === 'object':" + typeof undefined === 'object');//false

     console.log('------------------优先级搞的鬼');

     console.log("typeof obj === 'object':" + (typeof obj === 'object'));//typeof obj === 'object':true

     console.log("typeof arr === 'object':" + (typeof arr === 'object'));//typeof arr === 'object':true

     console.log("typeof null === 'object':" + (typeof null === 'object'));//typeof null === 'object':true

     console.log("typeof '' === 'object':" + (typeof '' === 'object'));//typeof '' === 'object':false

     console.log("typeof undefined === 'object':" + (typeof undefined === 'object'));//typeof undefined === 'object':false

     console.log('------------------优先级搞的鬼');

     console.log(("typeof obj === 'object':" + typeof obj) === 'object');//false

     console.log(("typeof arr === 'object':" + typeof arr) === 'object');//false

     console.log(("typeof null === 'object':" + typeof null) === 'object');//false

     console.log(("typeof '' === 'object':" + typeof '') === 'object');//false

     console.log(("typeof undefined === 'object':" + typeof undefined) === 'object');//false

     //"typeof obj === 'object':object“ === 'object' --------false

     console.log('*******************************************');

     console.log("Object.prototype.toString.call(obj) === '[object Object]':" + (Object.prototype.toString.call(obj)));//Object.prototype.toString.call(obj) === '[object Object]':[object Object]

     console.log("Object.prototype.toString.call(arr) === '[object Object]':" + (Object.prototype.toString.call(arr)));//Object.prototype.toString.call(arr) === '[object Object]':[object Array]

     console.log("Object.prototype.toString.call(null) === '[object Object]':" + (Object.prototype.toString.call(null)));//Object.prototype.toString.call(null) === '[object Object]':[object Null]

     console.log("Object.prototype.toString.call('') === '[object Object]':" + (Object.prototype.toString.call('')));//Object.prototype.toString.call('') === '[object Object]':[object String]

     console.log("Object.prototype.toString.call(undefined) === '[object Object]':" + (Object.prototype.toString.call(undefined)));// Object.prototype.toString.call(undefined) === '[object Object]':[object Undefined]

     console.log('*******************************************');

     //严谨的判断Object方式：

     console.log("Object.prototype.toString.call(obj) === '[object Object]':" + (Object.prototype.toString.call(obj) === "[object Object]"));//Object.prototype.toString.call(obj) === '[object Object]':true

     console.log("Object.prototype.toString.call(arr) === '[object Object]':" + (Object.prototype.toString.call(arr) === "[object Object]"));//Object.prototype.toString.call(arr) === '[object Object]':false

     console.log("Object.prototype.toString.call(null) === '[object Object]':" + (Object.prototype.toString.call(null) === "[object Object]"));// Object.prototype.toString.call(null) === '[object Object]':false

     console.log("Object.prototype.toString.call('') === '[object Object]':" + (Object.prototype.toString.call('') === "[object Object]"));// Object.prototype.toString.call('') === '[object Object]':false

     console.log("Object.prototype.toString.call(undefined) === '[object Object]':" + (Object.prototype.toString.call(undefined) === "[object Object]"));//Object.prototype.toString.call(undefined) === '[object Object]':false

 </script>

 </body>

 </html>

【JavaScript】之【Object】的更多相关文章

  1. 从头开始学JavaScript (十一)——Object类型

    原文:从头开始学JavaScript (十一)--Object类型 一.object类型 一个object就是一系列属性的集合,一个属性包含一个名字(属性名)和一个值(属性值). object对于在应 ...

  2. JavaScript中Object的总结

    基于原型继承,动态对象扩展,闭包,JavaScript已经成为当今世界上最灵活和富有表现力的编程语言之一. 这里有一个很重要的概念需要特别指出:在JavaScript中,包括所有的函数,数组,键值对和 ...

  3. JavaScript之Object拆解

    转载烦请注明原文链接: https://github.com/Xing-Chuan/blog/blob/master/JavaScript/JavaScript%E4%B9%8BObject%E6%8 ...

  4. JavaScript Math Object 数字

    JavaScript Math Object Math Object The Math object allows you to perform mathematical tasks. Math is ...

  5. JavaScript中Object.prototype.toString方法的原理

    在JavaScript中,想要判断某个对象值属于哪种内置类型,最靠谱的做法就是通过Object.prototype.toString方法. ? 1 2 var arr = []; console.lo ...

  6. 【WIP】客户端JavaScript Web Object

    创建: 2017/10/11   更新: 2017/10/14 标题加上[WIP],增加[TODO] 更新: 2018/01/22 更改标题 [客户端JavaScript Web Object, UR ...

  7. JavaScript中object和Object有什么区别

    JavaScript中object和Object有什么区别,为什么用typeof检测对象,返回object,而用instanceof 必须要接Object呢 ————————————————————— ...

  8. javascript nested object merge

    javascript nested object merge deep copy Object reference type function namespace(oNamespace, sPacka ...

  9. Javascript判断object还是list/array的类型（包含javascript的数据类型研究）

    前提:先研究javascript中的变量有几种,参考: http://www.w3school.com.cn/js/js_datatypes.asp http://glzaction.iteye.co ...

  10. javascript的 Object 和 Function

    一. javascript 的 内置对象: Object 和 Function javascript所有东西,包括 Function 都是对象 . Array  其实是一个 Function 类型的对 ...

随机推荐

  1. R语言实战（三）基本图形与基本统计分析

    本文对应<R语言实战>第6章:基本图形:第7章:基本统计分析 =============================================================== ...

  2. git pull提示当前不在某个分支上

    $ git pull You are not currently on a branch, so I cannot use any 'branch.<branchname>.merge' ...

  3. 微信内嵌浏览器sessionid丢失问题，nginx ip_hash将所有请求转发到一台机器

    现象微信中打开网页,图形验证码填写后,经常提示错误,即使填写正确也会提示错误,并且是间歇性出现. 系统前期,用户使用主要集中在pc浏览器中,一直没有出现这样的问题.近期有部分用户是在微信中访问的,才出 ...

  4. C++ 多态、虚函数机制以及虚函数表

    1.非virtual函数,调用规则取决于对象的显式类型.例如 A* a  = new B(); a->display(); 调用的就是A类中定义的display().和对象本体是B无关系. 2. ...

  5. ueditor使用小结

    一.简介 ueditor是百度编辑器,官网地址:http://ueditor.baidu.com/website/ 完整的功能演示,可以参考:http://ueditor.baidu.com/webs ...

  6. Xcode真机调试出现The account '***' has no team with ID '***'的解决方案

    前段时间,想用真机调试的时候出现 The account '***' has no team with ID '***'的问题, 以前页真机调试过,没有这种情况,于是我登陆开发者中心,进去发现说我的账 ...

  7. merge,join,concat

    merge交集 join并集 concat axis=0 竖着连 axis=1 横着连

  8. ORACLE 误删除视图恢复

    1.使用 dba_views 回退到特定时间段,查看定义 select view_name,text from (select * From dba_views AS OF TIMESTAMP(SYS ...

  9. PL/SQL设置快捷键

    PL/SQL常用的快捷方式: sf= select * from sr=select t.*,t.rowid from t sd = select distinct * from d=delete f ...

  10. Understanding the Internal Message Buffers of Storm

    Understanding the Internal Message Buffers of Storm Jun 21st, 2013 Table of Contents Internal messag ...