chrome 开发工具和 Firefox 开发工具有什么不同？

Question

我是 JavaScript 的新手，我在控制台上写了这个 js 代码：`

    function test (){} 
    var a1 = new test();
     a1;//chrome dev-tool test()
     a1;// firefox dev-tool : object {}
`

并在chrome dev-tool和Firefox dev-tool上运行它，我看到了不同的结果。

1.在 chrome w: 测试{}
2.in Firefox：对象{}

Answer 1

chrome is essentially saying {} is an empty object that was constructed by a function with name test.Firefox is saying {} is an empty object of general construction from Object.the subtle difference is that Chrome is actively tracking,as an internal property,进行构造的实际 function 的名称，而其他浏览器不跟踪该附加信息。