4
new Proxy(function() {}, {})

Creating a proxy to watch a function does not work on Chrome. Instead it throws an error: 

Uncaught illegal access

I want to watch a function and create a proxy handler for when its properties are accessed. Seems fine in Firefox. Any way to get around this?

northamerican
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2 Answers2

5

This is a problem with the Chrome devtools console trying to show the result, not the Proxy constructor itself. What version of Chrome are you using?

In the Chrome 50 console, I see this:

> let p = new Proxy(function(){return 6},{})
< undefined
> p
< #<Function>
Uncaught illegal access
  DebuggerScript.getFunctionScopes @ (program):4
> p()
< 6

So the function proxy works just fine, but the console barfs displaying it. Should be fixed in the latest Chrome versions. For now, you can just ignore the error.

Andreas Rossberg
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0

Indeed as @AndreasRossberg answered a Chrome limitation. If you use same code in Firefox it works correctly and outputs as expected:

> let p = new Proxy(function(){return 6},{})
< undefined
> p
< function ()
> p()
< 6
Wilt
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