ScrollBehavior definition is missing 'instant' for scrollTo

[patik]

Bug Report

🔎 Search Terms

instant
scrollbehavior
scrollTo
type definition

🕗 Version & Regression Information

v4.4.4, but it's also mentioned in #28755 (v3.2.1)

• This is a crash

⏯ Playground Link

Playground link with relevant code

💻 Code

window.scrollTo({
  top: 0,
  left: 0,
  behavior: 'instant' // This should be allowed
})

🙁 Actual behavior

The value of 'instant' cannot be assigned to behavior when using element.scrollTo() according to https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollTo as well as testing it in a browser

🙂 Expected behavior

The value of 'instant' is allowed when using element.scrollTo() according to https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollTo as well as testing it in a browser. Note that a similar issue, #28755, was about scrollIntoView(), which indeed does not allow 'instant'.

[PaperStrike]

I guess it's microsoft/TypeScript-DOM-lib-generator@fe01c9a#r31507840, instant isn't valid anywhere ever since.
You may need to info MDN folks to update the docs. 👀

[patik]

I stand corrected! For anyone else who comes across this, in my testing I found that browsers do indeed treat instant the same as auto, so it's safe to simply drop the property unless you need smooth.

[ObjectAssign]

@patik auto to me works as scrolling does, I guess that is because I have enabled smooth scroll in my browser...

However, I would really like the instant to be available

[jiri-thiemel-te]

I stand corrected! For anyone else who comes across this, in my testing I found that browsers do indeed treat instant the same as auto, so it's safe to simply drop the property unless you need smooth.

That most definitely is not true. It depends on the CSS property scroll-behaviour value . The instant value needs to be allowed for behavior property of scrollTo and scrollIntoView.

The default value is auto. That one you can omit as developer. Not this one. When the scroll-behaviour is set to smooth and you want to scroll to an element without the animation then you need to pass behavior: instant. See https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollTo#behavior

[helloint]

I stand corrected! For anyone else who comes across this, in my testing I found that browsers do indeed treat instant the same as auto, so it's safe to simply drop the property unless you need smooth.

not ideally solution but this works for me when upgrading typescript might not be an option.