node-webkit-screenshot

node-webkit-screenshot

Create screenshots using node-webkit

Install

npm install node-webkit-screenshot

Usage

var fs = require('fs');
var screenshot = require('node-webkit-screenshot');
 
screenshot({
  url : 'http://google.de',
  width : 1024,
  height : 768
})
.then(function(buffer){
  fs.writeFile('./out.png', buffer, function(){
    // This will close the screenshot service
    screenshot.close();
  });
});
 

screenshot(options)

port

Type: number Default: 3000

Specify custom port number for the webkit browser

delay

Type: number (seconds) Default: 0

Delay capturing the screenshot.

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

format

Type: string png|jpeg Default: png

Specify the image type fot he screenshot

width

Type: int Default: 0

Specify the with of the browser window

height

Type: int Default: 0

Specify the height of the browser window

crop (since 0.2.1)

Type: Object Default: undefined

This will only work if generating png's. A crop object may look like this:

{
  top : 10,
  left : 10,
  width : 100,
  height : 100
}

close()

This will close the node-webkit process. You have to call this function before node is able to exit.

Troubleshooting

If you would like to use this on travis or with a framebuffer like xvfb than you need to set the environment variable NODESCREENSHOT_SHOW to 1. (export NODESCREENSHOT_SHOW). See this .travis.yml for more information

Changelog

0.3.2

• Fix installation of sub modules for nw-screenshot
• Upgrade various modules

0.3.1

• Fix black backgrounds in screenshots.

0.3.0

• Add close() method.

0.2.1

• remove toolbar for node-webkit
• Add crop option.

0.2.0

• Rewrite using socket.io to communicate between a single nw-snapshot instance.
• Promise based API

0.1.0

• 0.1.0 Inital release