My javascript programs Eventlistener not work?

Question

hello dear helper my javascript project not work in sololearn apps... But the program work in my computer please help my project problem solf

Answer 1

jakaria sikder

Make a code and share link here. We can't help like this.

Btw write your js code inside this

window.onload = function () {

}

Answer 2

my javascript code :

var title = document.querySelector("#subjectName");
var titleA = document.querySelector(".kar");
var btn = document.querySelector("#btn");
var pr = document.querySelector("#title_result");

btn.addEventListener('click', function(){
if(titleA.value == "" || title.value == ""){
alert("please feel the box");
}else if(titleA.value>=80 && titleA.value<=100){

var newR = document.createElement("tr");

var newh = document.createElement("th");
var newj = document.createElement("th");
var newi = document.createElement("th");
newh.innerHTML= title.value;
newj.innerHTML= titleA.value;
newi.innerHTML= "A+" ;
newR.appendChild(newh);
newR.appendChild(newj);
newR.appendChild(newi);
pr.appendChild(newR);

}else if(titleA.value>=70 && titleA.value<80){
var newR = document.createElement("tr");

var new