Error in sololearn during attaching javascript

Question

When I attach js to html from my sololearn terminal it show error why.
Here when i addEventListener ir show null value but there is value which ibwrite

Answer 1

wait for the html to load.

the javascript tab runs before the html tab in the Sololearn Android app, so it will not be able to find your DOM elements because the html has not loaded yet.

in your js tab, do this:

onload = ()=>{

/* your js code here */

}