通过AJAX删除新添加的功能

Question

I have this original function :

<script>
function f(x){..}
function z(x){..}
...
</script>

These new functions are loaded later via AJAX :

<script>
function xyz(){..}
windows.abc(){..}
...
</script>

How do I delete ALL functions binded in the "this" and "windows" scope except the original ones ( in this case f(x), z(x) ). I need this to be dynamic meaning I have no idea what the new functions will be except that they will be binded to the "this" and "windows" scope. I'm thinking storing the original function names and not delete those during a loop.

Answer 1

I'm not sure what the context is, but avoid polluting the global scope with different values.

Store an array of your current global functions:

// Collect existing functions into an object
// It will look like this: { f: 1, z: 1 }
var funcs = {};
Object.keys(window).filter(function (c) {
   typeof window[c] === "function" && (funcs[c] = 1);
});

// Load new stuff
$.ajax(..., function () {
   // After loading it, delete the functions that didn't exist before
   Object.keys(window).forEach(function (c) {
      typeof window[c] === "function" && !funcs[c] && delete window[c];
   });
});