I have
let accountNumber = (document.getElementById("lash-phone") as HTMLInputElement).value;
inside a function in typescript react, but it's throwing this error
Property 'getElementById' does not exist on type 'never[]'. TS2339
and this same code works for other screens
TS can't pick up the type of document by itself, so you can let it know what's the type:
const lashPhone = (document as Document).getElementById('lash-phone') as HTMLInputElement;