I have faced the problem described in this question

How to debug Javascript in Chrome on a Visualforce page?

earlier opening dev tools before opening visual force (or clearing the cache) page resolved the problem in the past.

However since August 8th 2016: 1) I can NOT see the code as shown in the screenshot above. 2) The console.log commands in my javascript from my Visualforce page work 3) Any functions I call from the command line do not work. 4) There are no exceptions thrown when I type any commands even no "Uncaught ReferenceError:" This is happening only for visualforce page iframe and not the TOP frame.

My environment: Windows 8.1, Chrome 52.0.2743.116 m (64-bit)

Does anyone know how to fix this?


1 Answer 1


Found out that:

The problem is caused because of the visualforce main.js over riding the window.Map function. Following the steps in this Article resolves the issue Native JS Map prototype is overwritten in Visualforce page w/ a header

  • 1
    no link to Article in your answer; please add
    – cropredy
    Aug 12, 2016 at 18:58

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