Adjusting Puppeteer viewport to maximum size

Other Questions Puppeteer
1

Hey everyone,

I’m working on a Puppeteer project and I’m trying to figure out how to make the viewport as big as possible. Right now, I’m using the setViewport function to set a specific size:

await page.setViewport({
  width: 1600,
  height: 900
});

But what I really want is for the viewport to automatically adjust to the maximum size of the browser window. Is there a way to do this in Puppeteer? I’ve looked through the docs but couldn’t find anything about making the viewport dynamic or setting it to the max size.

Has anyone figured out a trick for this? Maybe there’s a way to get the screen size and use that? Any help would be awesome. Thanks!

2

I’ve dealt with this viewport issue in my Puppeteer projects too. Here’s what worked for me: instead of setting a fixed viewport, try using the page.evaluate() function to get the actual window dimensions dynamically. Something like this:

const dimensions = await page.evaluate(() => {
  return {
    width: window.innerWidth,
    height: window.innerHeight
  };
});

await page.setViewport(dimensions);

This approach adapts to whatever size the browser window is at runtime. It’s especially useful if you’re running tests on different machines or in various environments where screen sizes might vary. Just make sure you maximize the browser window before running this code if you want the largest possible viewport.

3

hEy livbrown, i’ve tackled this before! instead of setViewport, try using page.setViewport({ width: 0, height: 0 }). This trick makes puppeteer use the full browser window size. it’s not officially documented, but works like a charm. hope this helps ya out!

4

I’ve encountered a similar issue in my Puppeteer projects. One effective approach is to leverage the defaultViewport option when launching the browser. You can set it to null like this:

const browser = await puppeteer.launch({
  defaultViewport: null
});

This configuration allows the viewport to automatically adjust to the full size of the browser window. It’s a clean solution that doesn’t require manually setting dimensions or using undocumented tricks. Just remember to maximize the browser window if you’re not running in headless mode for consistent results across different environments.