Page.screenshot results in "TypeError: mime.getType is not a function" with Puppeteer v3.2.0

My environment:

• Puppeteer version: v3.2.0
• Platform / OS version: Ubuntu 16.04.6 LTS
• Node.js version: v12.13.1

What steps will reproduce the problem?

• Open a webpage with Puppeteer, such as: https://www.tripadvisor.fr/Restaurants-g187147-Paris_Ile_de_France.html
• Then try to take a screenshot, such as:

await page.screenshot({
   path: "/tmp/test-tripadvisor.png",
  fullPage: true,
);

What is the expected result?

• We should obtain the full-page screenshot saved at /tmp/test-tripadvisor.png (this is working perfectly fine with Puppeteer v3.0.0, I havent’ tested with v3.1.0)

What happens instead?

• We obtain this error:

(node:19576) UnhandledPromiseRejectionWarning: TypeError: mime.getType is not a function at Page.screenshot (/home/dev/node-ghost/node_modules/puppeteer/lib/Page.js:651:35) at Page.<anonymous> (/home/dev/node-ghost/node_modules/puppeteer/lib/helper.js:117:27)

[caida-ricky]

I solved this problem by (re)installing the mime module npm i mime

[nicolas-t]

Reinstalling didn’t work for me.

I fixed it by adding the type param :

await page.screenshot({
	path: "/tmp/test-tripadvisor.png",
	fullPage: true,
	type: 'png' // <-
})