Page.setViewport() method

page.setViewport will resize the page. A lot of websites don't expect phones to change size, so you should set the viewport before navigating to the page.

In the case of multiple pages in a single browser, each page can have its own viewport size.

Signature:

class Page {
  abstract setViewport(viewport: Viewport): Promise<void>;
}

Parameters

Parameter	Type	Description
viewport	Viewport

Returns:

Promise<void>

Remarks

Argument viewport have following properties:

• width: page width in pixels. required

• height: page height in pixels. required

• deviceScaleFactor: Specify device scale factor (can be thought of as DPR). Defaults to 1.

• isMobile: Whether the meta viewport tag is taken into account. Defaults to false.

• hasTouch: Specifies if viewport supports touch events. Defaults to false

• isLandScape: Specifies if viewport is in landscape mode. Defaults to false.

NOTE: in certain cases, setting viewport will reload the page in order to set the isMobile or hasTouch properties.

Example

const page = await browser.newPage();
await page.setViewport({
  width: 640,
  height: 480,
  deviceScaleFactor: 1,
});
await page.goto('https://example.com');