go.Diagram.fromDiv with Google chrome extension

GoJS
1

Hi Team,

I have google chrome extension which has content script as go-debug.js. I want to get diagram object from div so I have called below api in content.

go.Diagram.fromDiv(myDivObject which contains canvas)

It returns null with no exception; If I call same inside page dom context (or with debug console window) – It returns correct diagram object.

I have include go-debug.js in chrome extension and I saw go namespace is there in content script dom context.

Looking forward your help or suggestion to resolve this problem.

2

You need to execute code (such as go.Diagram.fromDiv(...)) in the page’s context.

3

Hi

I had used postMessage and try to pass javascript window.go object but It raised error

Uncaught DOMException: Failed to execute ‘postMessage’ on ‘Window’: function da(a,b,c){w.nc(this);this.oC=a;this.Rb=b;this.eH=c} could not be cloned.
at … (:22:10)

Please, help.

4

I have tried to post from page dom

interestedDiagram = window.go.Diagram.fromDiv(container);

window.postMessage({ type: “FROM_PAGE”, text: “from webpage”, result : objT, domWindow : interestedDiagram }, “*”);

This also gives clone issue

Uncaught DOMException: Failed to execute ‘postMessage’ on ‘Window’: function Dk(a,b,c,d){a/=d/2;return 1>a?c/2aa+b:-c/2*(–a*(a-2)-1)+b} could not be cloned.
at Object.myfun (:23:10)
at :1:5

Please help

5

I don’t use Google Chrome, so I cannot help you.

But the error message seems to be saying that functions cannot be serialized.