Javascript：筛选已附加到全局范围的变量？

Question

Is it possible to find variables that have been attached to the window scope in a browser? Not pre-existing variables, but ones that have been attached by me.

Doing console.log(window) gives a long list of variables available, but I only want to see what has been attached by me.

Answer 1

Well we can pull out any functions that have "[native function]" since those are... native. The following snippet will create an array non_natives of function names that were not pre-existing.

var non_natives = [];

for ( fin in window ) {
  if ( typeof(window[fin]) === "function" && window[ fin ].toString().indexOf("[native code]") === -1 ) {
    non_natives.push( fin );
  }
}

If you copy and paste that in your web console, you should be able to view the non_natives array.

Answer 2

您可以将输出减少为仅变量，请尝试此操作

Object.keys(window)