How to save iframe's content in standalone mode

[dontfireme]

I wanted to use SingleFile from JS console to archive some pages. I noticed that the standalone mode (copy-pastying SingleFile source into browser's console) cannot access some of the iframes due to the same-origin policy.

This is how I use it in the browser:

const { content, title, filename } = await window.singlefile.getPageData({
  removeImports: true,
  removeScripts: true,
  removeAudioSrc: true,
  removeVideoSrc: true  
});

essentially this piece of code is throwing:

Everything works well when using extension, so, my question is what kind of magic the extension does that makes it work? 🤔

Thank you for the awesome package!

[gildas-lormeau]

The code of SingleFile is injected in all frames when running into an extension. It relies on postMessage to pass data from frames to the main document when they're not from the same origin. See, https://github.com/gildas-lormeau/single-file-core/blob/6444c2ed3efea177d9ab0eb549944f03f535a425/processors/frame-tree/content/content-frame-tree.js#L263-L288