How to pass required module object to puppeteer page.evaluate

Question

• Puppeteer version: 1.0.0
• Platform / OS version: Windows 10
• Node.js version: 8.9.3

Here is my code:

const puppeteer = r         


        

Answer 1

You want to use module varname in a browser context. To achieve that you should use page.addScriptTag() to inject varname to browser like this:

const puppeteer = require('puppeteer');

(async () => {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();

    await page.addScriptTag({ path: './node_modules/varname/build/varname.js' });
    const generalInfo = await page.evaluate(() => {
        return window.varname.camelback('foo_bar_baz');
    });

    console.log(generalInfo); // prints fooBarBaz
    await browser.close();
})();