Things have changed and are much harder to use

[tn77]

OK, I have no idea how to use the Chrome Developer Tools any more. Things are incredibly difficult when they used to be simple; I've been devleoping web apps for years and years with Chrome's help.

I have a function on a page that I want to test, for example a generic function called toggle_div();

Previously, I could just open Chrome Developer Tools and type toggle_div() and the function would run.

Now, I get errors.

Uncaught ReferenceError: toggle_div is not defined

    at <anonymous>:1:1

What is the problem here? The function exists, and it works when called from the clicks on the page. Why can't I run functions from Chrome Developer Console any more?

[PhistucK]

What is your version of Chrome?

I am using Chrome 51 and never had this problem.

Is it possible that toggle_div is defined within a different functional context (say, within an immediately-invoked function expression - (function () { }());)?

Did you verify that the context of the console is correct? There is a selection box above the console, it usually says "top" (which is the context of the top frame) but recently, a feature was implemented so that when you focus on an element (in the Elements panel) that forms (or that is from) a different context (say, an <iframe>, or an element within an <iframe>) it automatically changes to that context.

I just realized that focusing on an <iframe> is enough to change contexts, which seems excessive and counterintuitive - the <iframe> itself is in the context of the document that contains it, so why does it change to the context of the <iframe>?

☆PhistucK

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