Protractor plugin

To validate browser source from protractor:

npm install --save-dev protractor-html-validate

In protractor.conf.js:

{
    plugins: [
        /* load plugin */
        {package: 'protractor-html-validate'}
    ],

    onPrepare: () => {
        /* load jasmine helper */
        require('protractor-html-validate/jasmine');
    }
}

See protractor-html-validate for details.