Progressive Web Application Development by Example

Running Lighthouse in a Node script

Like Sonar (which will be covered in the next section) and the other node-based utilities, you can also use Lighthouse in your own node scripts and modules. You need to create references to both the Lighthouse and chrome-launcher modules:

const Lighthouse = require("Lighthouse"), 
   chromeLauncher = require('chrome-launcher'); 

Both the Chrome Launcher and Lighthouse modules return promises. You must create a new Chrome instance before launching Lighthouse.

Chrome Launcher resolves a reference to a Chrome instance. You need to pass the developer port number to the Lighthouse module. This is how Lighthouse communicates with Chrome to perform the tests:

function launchChromeAndRunLighthouse(url, flags, config ...