I have two exactly the same web documents, but they don't output the same. What is my problem?

Question

I worked on a countdown, and wanted to use "innerHtml". But it didn't worked and so I looked to other web codes using "innerHtml" and copied one. I deleted all I didn't need, and it worked!

https://code.sololearn.com/Wp59zfu34HsY/?ref=app

https://code.sololearn.com/W6FU9GYWmMtn/?ref=app

Please comment if both output "b" on your smartphone etc. or not and if you know such problems, please comment it too.

Answer 1

Your problem is innerHTML , but not innerHtml.
right variant:
window.onload = function() {
var x = document.getElementById("p");
x.innerHTML= "b";
}

false variant:
window.onload = function() {
var x = document.getElementById("p");
x.innerHtml= "b";
}

Answer 2

in the second one you use x.innerHtml instead of x.innerHTML thats why the content doesn't change

Answer 3

I'm confused