Gutenberg Block: TypeError: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'.

[hsntareq]

Initializing this inside Gutenberg Blocks of WordPress is causing this problem. Anyone have solution for this type of error?

[collins-lagat]

The problem actually isn't getComputeStyle but this line:

keen-slider/src/core/utils.ts

Line 66 in b7aea40

: elements instanceof HTMLElement

The container property on the slider is actully null:

keen-slider/src/plugins/web/web.ts

Line 221 in b7aea40

slider.container = elem(container)

Checkout this thread on gutenberg WordPress/gutenberg#53867

So according to this reply (WordPress/gutenberg#53867 (comment)), you need to check the context of the element to see if it's an iframe or the main window.

A possible fix is this:

elements instanceof elements.ownerDocument.defaultView.HTMLElement