Javascript Not Working

Question

The coding in the url work perfectly in browser in my pc but somehow does not work normally in sololearn. How can i solve this issues ?

1) Cant use eventlistener.
2) Cant use .innerHTML

https://code.sololearn.com/WWhk0OTR5yex

Answer 1

first, try wrapping the JS code with

window.onload = function(){
..... all your code here .....
}

this will ensure that your HTML is rendered before you are attempting to access it using JS

second, when using getElementById the '#' symbol is not required (same goes for '.' in getElementsByTagName)

so remove those and see where your code stand at

Answer 2

Execute the code when the DOM is available.
addEventListener("DOMContentLoaded", function (){
[code]
});
This is normally better than window.onload