Solution 1 :

You can write basic js technically, but with type of course.

changeId() {
  let element: HTMLElement = document.getElementById('id');
  element.id = newId;
}

or just

changeId() {
  document.getElementById('id').id = newId;
}

Problem :

HTML

<span id="IDs"> hello </span>

.TS

changeID(){
  // call IDs and change value

}

In TypeScript how do I change the content of id IDs that’s in my HTML inside my .TS?

Does this answer your question?

TypeScript is a superset of JavaScript. When searching for “how to do something” don’t limit yourself to “…in typescript”.

You don’t need the

Yes. And? I wrote it that way. If you don’t like it you can answer it in your way 😉