/TypeScript/Property 'style' does not exist on type 'Element'.ts(2339)

Property 'style' does not exist on type 'Element'.ts(2339)

Property 'value' does not exist on type 'HTMLElement'.

document.getElementById() returns the type HTMLElement which does not contain a value property.
The subtype HTMLInputElement does however contain the value property.

So a solution is to cast the result of getElementById() to HTMLInputElement like this:

var inputValue = (<HTMLInputElement>document.getElementById(elementId)).value;
<> is the casting operator in typescript.
See TypeScript: casting HTMLElement: https://fireflysemantics.medium.com/casting-htmlelement-to-htmltextareaelement-in-typescript-f047cde4b4c3

The resulting javascript from the line above looks like this:

inputValue = (document.getElementById(elementId)).value;
i.e. containing no type information.

Source: fireflysemantics.medium.com

Property 'style' does not exist on type 'Element'.ts(2339)

// Cast to the type of `HTMLElement`
const el = document.getElementById('whatever') as HTMLElement;
el.style.paddingTop = ...;

// Or, if it is an array
const els = document.getElementsByClassName('my-class') as HTMLCollectionOf<HTMLElement>;

Source: stackoverflow.com

Property 'of' does not exist on type 'typeof Observable'.

import { of } from 'rxjs';

Source: stackoverflow.com

Property 'style' does not exist on type 'Element'

const node = document.querySelector<HTMLElement>(element);

Source: github.com

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