chrome 開發工具和 Firefox 開發工具有什么不同？

Question

我是 JavaScript 的新手，我在控制台上寫了這個 js 代碼：`

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

並在chrome dev-tool和Firefox dev-tool上運行它，我看到了不同的結果。

1.在 chrome w: 測試{}
2.in Firefox：對象{}

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,進行構造的實際 function 的名稱，而其他瀏覽器不跟蹤該附加信息。