javascript debugging_not running in sololearn console but running fine in web browser.

Question

var numSquares = 6;
var colors = [];
var pickedColor;
var squares = document.querySelectorAll(".square");
var colorDisplay = document.getElementById("colorDisplay");
var messageDisplay =document.querySelector("#message");
var h1 = document.querySelector("h1");
var resetButton = document.querySelector("#reset");
var modeButtons = document.querySelectorAll(".mode");

init();

function init(){
setupModeButtons();
setupSquares();
reset();
}
//mode buttons event listeners
function setupModeButtons(){
for(var i = 0; i < modeButtons.length; i++){
modeButtons[i].addEventListener("click", function(){
modeButtons[0].classList.remove("selected");
modeButtons[1].classList.remove("selected");
this.classList.add("selected");
this.textContent === "Easy" ? numSquares = 3: numSquares = 6;
reset();
});
}
}
//squers setup
function setupSquares(){
for (var i = 0; i < squares.length; i++){
//add click listeners to squares
squares[i].addEventListener("click", function(){
//grab color of clicked square
var clickedColor = this.style.background;
//compare color to pickedColor
if(clickedColor === pickedColor){
messageDisplay.textContent = "Correct!";
resetButton.textContent = "Play Again?";
changeColors(clickedColor);
h1.style.background = clickedColor;
} else {
this.style.background = "#232323";
messageDisplay.textContent = "Try Again"
}
});
}
}
//reset function
function reset(){
colors = generateRandomColors(numSquares);
//pick a new random color from array
pickedColor = pickColor();
//change colorDisplay to picked color
colorDisplay.textContent = pickedColor;
resetButton.textContent = "New Colors";
messageDisplay.textContent = "";
//change colors of squares
for(var i = 0; i < squares.length; i++){
if(colors[i]){
squares[i].style.display = "block";
squares[i].style.background = colors[i];
} else {
squares[i].style.display = "none";
}
}
h1.style.background = "steelb

Answer 1

It seems you are calling the script "colorGame.js"
There is no such script naming available here.
Try putting your js code between the script tags (and removing the src parameter) It should work fine
Example (working)
https://code.sololearn.com/W0uq0ygjfG5D/?ref=app

original code link:
https://code.sololearn.com/WRpKa2l1INrt/?ref=app

Answer 2

https://github.com/ps0305/RandomColorGuessGame

Answer 3

SAVE SAVE AS
JavaScript Console
Uncaught TypeError: Cannot set property 'textContent' of null
Line: 57