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| 1 | +document.addEventListener('DOMContentLoaded', () => { |
| 2 | + const gridDisplay = document.querySelector('.grid') |
| 3 | + const scoreDisplay = document.getElementById('score') |
| 4 | + |
| 5 | + let squares = [] |
| 6 | + let score = 0 |
| 7 | + |
| 8 | + function createBoard() { |
| 9 | + for (let i=0; i< 16; i++){ |
| 10 | + square = document.createElement('div') |
| 11 | + square.innerHTML = 0 |
| 12 | + gridDisplay.appendChild(square) |
| 13 | + squares.push(square) |
| 14 | + } |
| 15 | + generateTwo() |
| 16 | + generateTwo() |
| 17 | + } |
| 18 | + createBoard() |
| 19 | + |
| 20 | + function generateTwo(){ |
| 21 | + let random = Math.floor(Math.random() * squares.length) |
| 22 | + if (squares[random].innerHTML == 0){ |
| 23 | + squares[random].innerHTML = 2 |
| 24 | + checkLose() |
| 25 | + } |
| 26 | + else generateTwo() |
| 27 | + } |
| 28 | + |
| 29 | + //swipe right |
| 30 | + function moveRight(){ |
| 31 | + for (let i = 0; i<16; i++){ |
| 32 | + if(i%4 == 0 ){ |
| 33 | + let totalOne = parseInt(squares[i].innerHTML) |
| 34 | + let totalTwo = parseInt(squares[i+1].innerHTML) |
| 35 | + let totalThree = parseInt(squares[i+2].innerHTML) |
| 36 | + let totalFour = parseInt(squares[i+3].innerHTML) |
| 37 | + let row = [totalOne,totalTwo,totalThree,totalFour] |
| 38 | + |
| 39 | + //console.log(row) |
| 40 | + |
| 41 | + let filteredRow = row.filter(x => x != 0) |
| 42 | + //console.log(filteredRow) |
| 43 | + let missing = 4 - filteredRow.length |
| 44 | + let zeros = Array(missing).fill(0) |
| 45 | + //console.log(zeros) |
| 46 | + let newRow = zeros.concat(filteredRow) |
| 47 | + //console.log(newRow) |
| 48 | + |
| 49 | + //insert new row into the squares |
| 50 | + squares[i].innerHTML = newRow[0] |
| 51 | + squares[i+1].innerHTML = newRow[1] |
| 52 | + squares[i+2].innerHTML = newRow[2] |
| 53 | + squares[i+3].innerHTML = newRow[3] |
| 54 | + } |
| 55 | + } |
| 56 | + } |
| 57 | + |
| 58 | + //swipe left |
| 59 | + function moveLeft(){ |
| 60 | + for (let i = 0; i<16; i++){ |
| 61 | + if(i%4 == 0 ){ //first column |
| 62 | + let totalOne = parseInt(squares[i].innerHTML) |
| 63 | + let totalTwo = parseInt(squares[i+1].innerHTML) |
| 64 | + let totalThree = parseInt(squares[i+2].innerHTML) |
| 65 | + let totalFour = parseInt(squares[i+3].innerHTML) |
| 66 | + let row = [totalOne,totalTwo,totalThree,totalFour] |
| 67 | + |
| 68 | + |
| 69 | + let filteredRow = row.filter(x => x != 0) |
| 70 | + let missing = 4 - filteredRow.length |
| 71 | + let zeros = Array(missing).fill(0) |
| 72 | + let newRow = filteredRow.concat(zeros) |
| 73 | + |
| 74 | + |
| 75 | + //insert new row into the squares |
| 76 | + squares[i].innerHTML = newRow[0] |
| 77 | + squares[i+1].innerHTML = newRow[1] |
| 78 | + squares[i+2].innerHTML = newRow[2] |
| 79 | + squares[i+3].innerHTML = newRow[3] |
| 80 | + } |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + function sumRow(){ |
| 85 | + for (let i=0; i <15; i++){ //end before index 15 because is has no "right neighbour" |
| 86 | + if(squares[i].innerHTML == squares[i+1].innerHTML){ |
| 87 | + let combineNum = parseInt(squares[i].innerHTML) + parseInt(squares[i+1].innerHTML) |
| 88 | + squares[i].innerHTML = combineNum |
| 89 | + squares[i+1].innerHTML = 0 |
| 90 | + score += combineNum |
| 91 | + scoreDisplay.innerHTML = score |
| 92 | + } |
| 93 | + } |
| 94 | + } |
| 95 | + |
| 96 | + checkWin() |
| 97 | + |
| 98 | + function moveDown(){ |
| 99 | + //get column |
| 100 | + for(let i=0; i<4; i++){ |
| 101 | + let totalOne = parseInt(squares[i].innerHTML) |
| 102 | + let totalTwo = parseInt(squares[i+4].innerHTML) |
| 103 | + let totalThree = parseInt(squares[i+4*2].innerHTML) |
| 104 | + let totalFour = parseInt(squares[i+4*3].innerHTML) |
| 105 | + let column = [totalOne,totalTwo,totalThree,totalFour] |
| 106 | + |
| 107 | + let filteredColumn = column.filter(x => x!=0 ) |
| 108 | + let missing = 4 - filteredColumn.length |
| 109 | + let zeros = Array(missing).fill(0) |
| 110 | + let newColumn = zeros.concat(filteredColumn) |
| 111 | + |
| 112 | + squares[i].innerHTML = newColumn[0] |
| 113 | + squares[i+4].innerHTML = newColumn[1] |
| 114 | + squares[i+4*2].innerHTML = newColumn[2] |
| 115 | + squares[i+4*3].innerHTML = newColumn[3] |
| 116 | + } |
| 117 | + } |
| 118 | + |
| 119 | + function moveUp(){ |
| 120 | + //get column |
| 121 | + for(let i=0; i<4; i++){ |
| 122 | + let totalOne = parseInt(squares[i].innerHTML) |
| 123 | + let totalTwo = parseInt(squares[i+4].innerHTML) |
| 124 | + let totalThree = parseInt(squares[i+4*2].innerHTML) |
| 125 | + let totalFour = parseInt(squares[i+4*3].innerHTML) |
| 126 | + let column = [totalOne,totalTwo,totalThree,totalFour] |
| 127 | + |
| 128 | + let filteredColumn = column.filter(x => x!=0 ) |
| 129 | + let missing = 4 - filteredColumn.length |
| 130 | + let zeros = Array(missing).fill(0) |
| 131 | + let newColumn = filteredColumn.concat(zeros) |
| 132 | + |
| 133 | + squares[i].innerHTML = newColumn[0] |
| 134 | + squares[i+4].innerHTML = newColumn[1] |
| 135 | + squares[i+4*2].innerHTML = newColumn[2] |
| 136 | + squares[i+4*3].innerHTML = newColumn[3] |
| 137 | + } |
| 138 | + } |
| 139 | + |
| 140 | + function sumColumn(){ |
| 141 | + for (let i=0; i <12; i++){ //end before index 12 because is has no "below neighbour" |
| 142 | + if(squares[i].innerHTML == squares[i+4].innerHTML){ |
| 143 | + let combineNum = parseInt(squares[i].innerHTML) + parseInt(squares[i+4].innerHTML) |
| 144 | + squares[i].innerHTML = combineNum |
| 145 | + squares[i+4].innerHTML = 0 |
| 146 | + score += combineNum |
| 147 | + scoreDisplay.innerHTML = score |
| 148 | + } |
| 149 | + } |
| 150 | + |
| 151 | + checkWin() |
| 152 | + } |
| 153 | + |
| 154 | + //Assign keys |
| 155 | + function control(event){ |
| 156 | + if(event.keyCode === 39){ |
| 157 | + keyRight() |
| 158 | + }else if (event.keyCode === 37){ |
| 159 | + keyLeft() |
| 160 | + }else if (event.keyCode === 38){ |
| 161 | + keyUp() |
| 162 | + }else if (event.keyCode === 40){ |
| 163 | + keyDown() |
| 164 | + } |
| 165 | + |
| 166 | + } |
| 167 | + document.addEventListener('keyup',control) |
| 168 | + |
| 169 | + function keyRight(){ |
| 170 | + moveRight() //move all to right |
| 171 | + sumRow() //combine neighbour if same number |
| 172 | + moveRight() //move all to right again |
| 173 | + generateTwo() //generate new numbers |
| 174 | + } |
| 175 | + |
| 176 | + function keyLeft(){ |
| 177 | + moveLeft() |
| 178 | + sumRow() |
| 179 | + moveLeft() |
| 180 | + generateTwo() |
| 181 | + } |
| 182 | + |
| 183 | + function keyDown(){ |
| 184 | + moveDown() |
| 185 | + sumColumn() |
| 186 | + moveDown() |
| 187 | + generateTwo() |
| 188 | + } |
| 189 | + |
| 190 | + function keyUp(){ |
| 191 | + moveUp() |
| 192 | + sumColumn() |
| 193 | + moveUp() |
| 194 | + generateTwo() |
| 195 | + } |
| 196 | + |
| 197 | + function checkWin(){ |
| 198 | + for(let i=0; i < 16; i++){ |
| 199 | + if (squares[i].innerHTML == 2048){ |
| 200 | + alert('Congratulations!! Refresh the page to play again.') |
| 201 | + document.removeEventListener('keyup', control) |
| 202 | + } |
| 203 | + } |
| 204 | + } |
| 205 | + |
| 206 | + function checkLose(){ |
| 207 | + let numZeros = 0 |
| 208 | + for(let i = 0; i<16; i++){ |
| 209 | + if(squares[i].innerHTML==0){ |
| 210 | + numZeros++ |
| 211 | + } |
| 212 | + } |
| 213 | + if(numZeros===0){ |
| 214 | + alert('Game Over!! Refresh the page to play again.') |
| 215 | + document.removeEventListener('keyup', control) |
| 216 | + } |
| 217 | + } |
| 218 | +}) |
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