Property 'pseudoStyle' does not exist on type 'HTMLElement'

I'm trying to modify the pseudo element's height using Typescript.

I'm getting the following error in my IDE (vscode)

This is my code.

// select element
let el: HTMLElement = document.getElementById('filter-container');
// style the height of psydo element
el.pseudoStyle("before", "height", newHeight);
...

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