DOM JS

Question

I thought, i understand the DOM concept but by taking the code below i am confuse:

var elem = document.getElementsById("demo");
elem.innerHTML = "Hi";

Using the "variable.innerHTML" will outputs what is in the quotes??
here for example : Hi ?

When running this i get an error but i think everything is Ok!

Please any suggestion to help me understand well this concept.

Answer 1

Your code is correct.

You get null because SoloLearn puts scripts in head.

https://www.sololearn.com/post/90825/?ref=app

Answer 2

Ah okay, Thanks you