color.js

 // The Great RGB Color Game by Colt Steele (https://www.udemy.com/the-web-developer-bootcamp)

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();
}


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");

			if( this.textContent === "Easy"){
				numSquares = 3;
			} else {
				numSquares = 6;
			}
			reset();
		});
	}
}

function setUpSquares(){
	for(var i = 0; i < squares.length; i++) {
		// add initial colors
		squares[i].style.background = colors[i];

		// add click listeners
		squares[i].addEventListener("click", function(){
			var clickedColor = this.style.background;
			if(clickedColor === pickedColor) {
				messageDisplay.textContent = "Correct!";
				resetButton.textContent = "Play again?"
				changeColor(clickedColor);
				h1.style.background = clickedColor;
			} else {
				this.style.background = "#232323";
				messageDisplay.textContent = "Try Again";
			}
		});
	}
}


resetButton.addEventListener("click", function(){
	reset();
});


function reset(){
	colors = generateRandomColors(numSquares);
	pickedColor = pickColor();
	colorDisplay.textContent = pickedColor;

	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 = "steelblue";
	messageDisplay.textContent = "";
	resetButton.textContent = "New Colors";
}


function changeColor(color){
	for(var i = 0; i < squares.length; i++){
		squares[i].style.background = color;
	}
}


function pickColor(){
	var random = Math.floor(Math.random() * colors.length);
	return colors[random];
}


function generateRandomColors(num) {
	var arr = [];
	for(var i = 0; i < num; i++) {
		arr.push(randomColor());
	}
	return arr;	
}


function randomColor(){
	var r = Math.floor(Math.random() * 256);
	var g = Math.floor(Math.random() * 256);
	var b = Math.floor(Math.random() * 256);
	return "rgb(" + r + ", " + g + ", " + b + ")";
}