65 lines
No EOL
1.7 KiB
JavaScript
65 lines
No EOL
1.7 KiB
JavaScript
/*----- constants -----*/
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const COLORS = {
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'0': 'white',
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'1': 'purple',
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'-1': 'lime'
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};
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/*----- app's state (variables) -----*/
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let board, turn, winner;
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/*----- cached element references -----*/
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/*----- event listeners -----*/
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document.querySelector('section.markers')
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.addEventListener('click', handleClick);
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/*----- functions -----*/
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init();
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function init() {
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board = [
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[0, 0, 0, 0, 0, 0], // column 1 (index 0)
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[0, 0, 0, 0, 0, 0], // column 2 (index 1)
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[0, 0, 0, 0, 0, 0], // column 3 (index 2)
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[0, 0, 0, 0, 0, 0], // column 4 (index 3)
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[0, 0, 0, 0, 0, 0], // column 5 (index 4)
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[0, 0, 0, 0, 0, 0], // column 6 (index 5)
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[0, 0, 0, 0, 0, 0], // column 7 (index 6)
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];
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turn = 1;
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winner = null; // 1, -1, null (no winner), 'T' (tie)
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render();
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}
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function render() {
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// Render the board
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board.forEach(function(colArr, colIdx) {
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colArr.forEach(function(cell, rowIdx) {
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let div = document.getElementById(`c${colIdx}r${rowIdx}`);
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div.style.backgroundColor = COLORS[cell];
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});
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});
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}
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function handleClick(evt) {
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// get index of column's marker clicked
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let idx = parseInt(evt.target.id.replace('col', ''));
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// make sure the MARKER was clicked
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if (isNaN(idx) || winner) return;
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// obtain the actual column array in board array
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let colArr = board[idx];
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// get the index of the first 0 in the col array
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let rowIdx = colArr.indexOf(0);
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// if the col is full, there are no zeroes, therefore
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// indexOf returns -1.
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// Do nothing if no zeroes available (col full)
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if (rowIdx === -1) return;
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// update the col array (within the board) with
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// the player whose turn it is
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colArr[rowIdx] = turn;
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// flip turns from 1 to -1; -1 to 1
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turn *= -1;
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render();
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} |