`getComputedStyle` invalid return type

[turansky]

Summary

getComputedStyle should return CSSStyleProperties (instead of CSSStyleDeclaration)

Expected vs. Actual Behavior

Expected - CSSStyleProperties
Actual - CSSStyleDeclaration

Playground Link

No response

Browser Support

• This API is supported in at least two major browser engines (not two Chromium-based browsers).

Have Tried The Latest Releases

• This issue applies to the latest release of TypeScript.
• This issue applies to the latest release of @types/web.

Additional Context

559c567 - commit, where CSSStyleProperties was introduced

ElementCSSInlineStyle.style property is also affected

[bdbvb]

I ran into this same problem. But on MDN it indicates that getComputedStyle() actually returns CSSStyleDeclaration.

So I ended up adjusting the setting and getting of properties using setProperty() and getPropertyValue() on the CSSStyleDeclaration.

I can only guess that for @types/web, the return value of getComputedStyle() may have been more permissive and is now coming into closer alignment with the spec, via this release.

[Bashamega]

Correct, @bdbvb.
There are major updates underway to bring this library closer to the BCD 6.0.24 specs.
#2047