javascript - type 'NodeListOf<HTMLLIElement>' is not assignable to type 'Element[]'

Question

let li: Element[] = document.getElementsByTagName('span');

I get the type conversion error, how to store the values in 'Element[ ]' ??

Answer 1

The object returned from document.getElementsByTagName('span') is not compatible with an array object. You need to declare it as following:

let li: NodeListOf<HTMLElement> = document.getElementsByTagName('span');

If you really need this to be an array object you can use:

let li: NodeListOf<HTMLElement> = document.getElementsByTagName('span');
let liArray: Element[] = Array.prototype.slice.call(li);