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script.js
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script.js
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document.addEventListener('DOMContentLoaded', () => {
const gridDisplay = document.querySelector('.grid')
const scoreDisplay = document.getElementById('score')
const resultDisplay = document.getElementById('result')
const stop=document.querySelector('.stop-button')
scoreDisplay.style.fontSize="40px"
let squares = []
let count=0
const width = 4
let score = 0
var retreive = localStorage.getItem("high_score_local");
stop.addEventListener('click',()=> location.reload())
//create the playing board
function createBoard() {
for (let i=0; i < width*width; i++) {
square = document.createElement('div')
square.innerHTML = 0
gridDisplay.appendChild(square)
squares.push(square)
}
generate()
generate()
}
createBoard()
//generate a new number
function generate() {
if(count == 50){
count=0
return;
}
randomNumber = Math.floor(Math.random() * squares.length)
randomguide= Math.floor(Math.random() *6)
if (squares[randomNumber].innerHTML == 0) {
if(randomguide == 1){
squares[randomNumber].innerHTML = 4
}else{
squares[randomNumber].innerHTML = 2
}
addColours()
}
else{
count++
generate()
}
}
function moveRight() {
for (let i=0; i < 16; i++) {
if (i % 4 === 0) {
let totalOne = squares[i].innerHTML
let totalTwo = squares[i+1].innerHTML
let totalThree = squares[i+2].innerHTML
let totalFour = squares[i+3].innerHTML
let row = [parseInt(totalOne), parseInt(totalTwo), parseInt(totalThree), parseInt(totalFour)]
let filteredRow = row.filter(num => num)
let missing = 4 - filteredRow.length
let zeros = Array(missing).fill(0)
let newRow = zeros.concat(filteredRow)
squares[i].innerHTML = newRow[0]
squares[i +1].innerHTML = newRow[1]
squares[i +2].innerHTML = newRow[2]
squares[i +3].innerHTML = newRow[3]
}
}
}
function moveLeft() {
for (let i=0; i < 16; i++) {
if (i % 4 === 0) {
let totalOne = squares[i].innerHTML
let totalTwo = squares[i+1].innerHTML
let totalThree = squares[i+2].innerHTML
let totalFour = squares[i+3].innerHTML
let row = [parseInt(totalOne), parseInt(totalTwo), parseInt(totalThree), parseInt(totalFour)]
let filteredRow = row.filter(num => num)
let missing = 4 - filteredRow.length
let zeros = Array(missing).fill(0)
let newRow = filteredRow.concat(zeros)
squares[i].innerHTML = newRow[0]
squares[i +1].innerHTML = newRow[1]
squares[i +2].innerHTML = newRow[2]
squares[i +3].innerHTML = newRow[3]
}
}
}
function moveUp() {
for (let i=0; i < 4; i++) {
let totalOne = squares[i].innerHTML
let totalTwo = squares[i+width].innerHTML
let totalThree = squares[i+(width*2)].innerHTML
let totalFour = squares[i+(width*3)].innerHTML
let column = [parseInt(totalOne), parseInt(totalTwo), parseInt(totalThree), parseInt(totalFour)]
let filteredColumn = column.filter(num => num)
let missing = 4 - filteredColumn.length
let zeros = Array(missing).fill(0)
let newColumn = filteredColumn.concat(zeros)
squares[i].innerHTML = newColumn[0]
squares[i +width].innerHTML = newColumn[1]
squares[i+(width*2)].innerHTML = newColumn[2]
squares[i+(width*3)].innerHTML = newColumn[3]
}
}
function moveDown() {
for (let i=0; i < 4; i++) {
let totalOne = squares[i].innerHTML
let totalTwo = squares[i+width].innerHTML
let totalThree = squares[i+(width*2)].innerHTML
let totalFour = squares[i+(width*3)].innerHTML
let column = [parseInt(totalOne), parseInt(totalTwo), parseInt(totalThree), parseInt(totalFour)]
let filteredColumn = column.filter(num => num)
let missing = 4 - filteredColumn.length
let zeros = Array(missing).fill(0)
let newColumn = zeros.concat(filteredColumn)
squares[i].innerHTML = newColumn[0]
squares[i +width].innerHTML = newColumn[1]
squares[i+(width*2)].innerHTML = newColumn[2]
squares[i+(width*3)].innerHTML = newColumn[3]
}
}
function combineRow() {
for (let i =1; i < 16; i++) {
if(i%4==0){
continue;
}
if (squares[i-1].innerHTML === squares[i].innerHTML) {
let combinedTotal = parseInt(squares[i-1].innerHTML) + parseInt(squares[i].innerHTML)
squares[i-1].innerHTML = combinedTotal
squares[i].innerHTML = 0
score += combinedTotal
scoreDisplay.innerHTML = score
}
}
// checkForGameOver_test()
checkForWin()
}
function combineColumn() {
for (let i =0; i < 12; i++) {
if (squares[i].innerHTML === squares[i +width].innerHTML) {
let combinedTotal = parseInt(squares[i].innerHTML) + parseInt(squares[i +width].innerHTML)
squares[i].innerHTML = combinedTotal
squares[i +width].innerHTML = 0
score += combinedTotal
scoreDisplay.innerHTML = score
}
}
//checkForGameOver_test()
checkForWin()
}
//assign functions to keyCodes
function control(e) {
if(e.keyCode === 37 || e.keyCode === 100) {
keyLeft()
} else if (e.keyCode === 38 || e.keyCode === 104) {
keyUp()
} else if (e.keyCode === 39 || e.keyCode === 102) {
keyRight()
} else if (e.keyCode === 40 || e.keyCode === 98) {
keyDown()
}
}
document.addEventListener('keyup', control)
function keyRight() {
for (let i =1; i <16; i++) {
if (squares[i-1].innerHTML === squares[i].innerHTML && squares[i]!=0) {
zeros=1
break;
}
}
moveRight()
combineRow()
moveRight()
generate()
checkForGameOver_test()
}
function keyLeft() {
moveLeft()
combineRow()
moveLeft()
generate()
checkForGameOver_test()
}
function keyUp() {
moveUp()
combineColumn()
moveUp()
generate()
checkForGameOver_test()
}
function keyDown() {
moveDown()
combineColumn()
moveDown()
generate()
checkForGameOver_test()
}
//check for the number 2048 in the squares to win
function checkForWin() {
for (let i=0; i < squares.length; i++) {
if (squares[i].innerHTML == 2048) {
resultDisplay.innerHTML = 'You WIN'
document.removeEventListener('keyup', control)
setTimeout(() => clear(), 3000)
}
}
}
//clear timer
function clear() {
clearInterval(myTimer)
}
function checkForGameOver_test(){
let zeros=0
for(let u=0;u<squares.length;u++){
if(squares[u].innerHTML==0){
zeros=1
break;
}
}
//rows
for (let i =1; i <16; i++) {
if(i%4==0){
continue;
}
if (squares[i-1].innerHTML === squares[i].innerHTML) {
zeros=1
break;
}
}
//columns
for (let k =15; k >=4; k--) {
if (squares[k].innerHTML === squares[k-4].innerHTML) {
zeros=1
break;
}
}
for(let i=0;i<squares.length;i++){
if (zeros == 0 && squares[i].innerHTML != 0) {
if(score < retreive){
localStorage.setItem("high_score",score)
var retreives = localStorage.getItem("high_score")
resultDisplay.innerHTML = 'You LOSE,' + ' BEST ['+ retreive + ']'
document.removeEventListener('keyup', control)
setTimeout(() => clear(), 3000)
break;
}
localStorage.setItem("high_score_local",score)
retreive = localStorage.getItem("high_score_local")
resultDisplay.innerHTML = 'You LOSE,' + ' BEST ['+ retreive +']'
document.removeEventListener('keyup', control)
setTimeout(() => clear(), 3000)
}
}
}
//add colours
function addColours() {
for (let i=0; i < squares.length; i++) {
if (squares[i].innerHTML == 0) squares[i].style.backgroundColor = '#c4b7b7'
else if (squares[i].innerHTML == 2) squares[i].style.backgroundColor = '#eee4da'
else if (squares[i].innerHTML == 4) squares[i].style.backgroundColor = '#f0d0a1'
else if (squares[i].innerHTML == 8) squares[i].style.backgroundColor = '#eb9042'
else if (squares[i].innerHTML == 16) squares[i].style.backgroundColor = '#fa8787'
else if (squares[i].innerHTML == 32) squares[i].style.backgroundColor = '#ff5c33'
else if (squares[i].innerHTML == 64) squares[i].style.backgroundColor = '#ff0000'
else if (squares[i].innerHTML == 128) squares[i].style.backgroundColor = '#ffd952'
else if (squares[i].innerHTML == 256) squares[i].style.backgroundColor = '#df80ff'
else if (squares[i].innerHTML == 512) squares[i].style.backgroundColor = '#76daff'
else if (squares[i].innerHTML == 1024) squares[i].style.backgroundColor = '#ff33cc'
else if (squares[i].innerHTML == 2048) squares[i].style.backgroundColor = '#baff00'
}
}
var myTimer = setInterval(addColours, 50)
//Adding Gestures LEFT RIGHT UP DOWN
document.addEventListener('touchstart', handleTouchStart, false);
document.addEventListener('touchmove', handleTouchMove, false);
var xDown = null;
var yDown = null;
function getTouches(evt) {
return evt.touches || // browser API
evt.originalEvent.touches; // jQuery
}
function handleTouchStart(evt) {
const firstTouch = getTouches(evt)[0];
xDown = firstTouch.clientX;
yDown = firstTouch.clientY;
};
function handleTouchMove(evt) {
if ( ! xDown || ! yDown ) {
return;
}
var xUp = evt.touches[0].clientX;
var yUp = evt.touches[0].clientY;
var xDiff = xDown - xUp;
var yDiff = yDown - yUp;
if ( Math.abs( xDiff ) > Math.abs( yDiff ) ) {/*most significant*/
if ( xDiff > 0 ) {
keyLeft()
} else {
keyRight()
}
} else {
if ( yDiff > 0 ) {
keyUp()
} else {
keyDown()
}
}
/* reset values */
xDown = null;
yDown = null;
};
})