Electron: Print with custom pageSize

[vasumahesh1]

• Electron version: 0.36.1
• Operating system: Windows 10 x64

Hi, Is it possible to print with a custom page size? I wanted to generate a 3inch x 5inch PDF document.

I checked out web-contents.js and it seems it defaults to A4 and only from a set of discrete values.

This PR suggested that it was possible to have custom dimensions.

I was wondering If I just change those lines in a custom build and pass my own set of dimensions will that work?

[vasumahesh1]

Was able to find a work around.

It seems if you add this CSS to your page:

@page {
  size: 3in 5in;
}

Then the CSS is able to change the page layout and printToPDF works as expected. Found a test case in Blink using custom page sizes by the above method.