sahwar / html2png

Take a screenshot of a HTML fragment or URL

html2png

Take a screenshot of a HTML fragment or URL

Installation

This module is installed via npm:

$ npm install html2png

Example Usage

Render some HTML into a PNG Buffer Object

var html2png = require('html2png');
var screenshot = html2png({ width: 1280, height: 720, browser: 'phantomjs'});
screenshot.render('<b>Hello</b>', function (err, data) {
  // If there is an error close the web browser first before calling the
  // errback
  if (err) return screenshot.error(err, cb);

  // data will contain a screenshot of the HTML as a node.js Buffer
  console.log(data);
  //<Buffer 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 02 80 ...>

  // Close the web browser (phantomjs or chrome)
  screenshot.close(done);
});

API

html2png([options])

The constructor is passed an options object:

• width, height - the width and height of the browser. NB: This is not the maximum dimensions of each screenshot. So if the rendered page is higher than height the screenshot returned will be the full rendered height of the page.
• browser - The browser to use for rendering. By default this is phantomjs and this module bundles together a static binary of phantomjs with phantomjs-bin. If you have Google Chrome installed and chromedriver is in your PATH, then you can render with Chrome.

html2png#render(html, cb)

Renderes html into a PNG node.js Buffer and returns the data in the callback.

html2png#renderUrl(url, cb)

Renders the URL url into a PNG node.js Buffer and returns the data in the callback.

html2png#close(cb);

Closes the underlying webdriver web browser used for the rendering (eg. Phantomjs or Chrome). Highly recommended.

html2png#error(err, cb)

Helper method that will call #close first, before calling the usual errback with the error.