Take screenshots using electron

npm install electron-screenshot-service

var fs = require('fs');
var screenshot = require('electron-screenshot-service');

screenshot({
  url : 'http://google.de',
  width : 1024,
  height : 768
})
.then(function(img){
  fs.writeFile('./out.png', img.data, function(err){
    screenshot.close();
  });
});

Will return a Promise containing an object like:

{
  data: <Buffer >
  size: {
    width: X
    height: N
  }
}

In addition to all options that can be passed to the BrowserWindow you can pass:

Type: number (milliseconds)
Default: 0

Delay capturing the screenshot.

Useful when the site does things after loading that you want to capture.

Type: number Default: 0

Specify the with of the browser window

Type: number Default: 0

Specify the height of the browser window

Type: Object
Default: undefined

An crop object may look like this:

{
  x : 10,
  y : 10,
  width : 100,
  height : 100
}

Type: String
Default: undefined

This css will be injected into the page before the screenshot is taken.

Type: String
Default: undefined

It must contain a function definition that takes on parameter e.g.

js: 'function(takeScreenshot){ /*Do some stuff*/ takeScreenshot();}'

or

js: 'takeScreenshot => { /*Do some stuff*/ takeScreenshot();}'

Type: Boolean
Default: false

This will enable transparency. Keep in mind that most site do set a background color on the html/body tag. You can overwrite this by using the css option using something like html,body{ background-color: transparent !important;}.

Type: Boolean
Default: false

This will try to capture the whole page. width and height are considered the minimum size.

Will close the screenshot service. Needed to let the node process exit

Scale the number of electron processes to scale processes. This will round-robin the screenshot jobs across scale instances.

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