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HTML

              
                .container
	.header.text-center
		.row
			.col-sm-12
				%h1 Tic Tac Toe
		
	.main.text-center
		.row.clearfix
			.col-sm-12#frame
				.row.clearfix
					.col-sm-2
					.col-sm-8
						%p#alert1 'X' WINS!
						%p#alert2 'O' WINS!
						%p#alert3 Already selected!
					.col-sm-2

				.row.clearfix
					.col-sm-4
						%ul
							%li#one{:value => "0"}
							%li#four{:value => "3"}
							%li#seven{:value => "6"}
					.col-sm-4
						%ul
							%li#two{:value => "1"}
							%li#five{:value => "4"}
							%li#eight{:value => "7"}
					.col-sm-4
						%ul
							%li#three{:value => "2"}
							%li#six{:value => "5"}
							%li#nine{:value => "8"}
			
		.row.clearfix
			.col-sm-12
				%button#reset Reset
			
.footer 
	%p Made with love, by Pilar. 2017.
		
              
            
!

CSS

              
                $color1: rgb(249,251,250);
$color2: rgb(115,201,202);
$color3: rgb(60,128,151);
$color4: rgb(213,231,231);
$color5: rgb(108,24,109);

body {
	text-align: center;
	background: linear-gradient($color2, $color5);
	color: $color1;
	min-height: 900px;
}

.header {
	margin: 40px 0 20px 0;
	h1 {
		font-size: 100px;
		font-family: Avenir, sans-serif;
	}
}

.main {
	width: 100%;
	max-width: 400px;
	margin: auto;
	@media screen and (min-width: 400px) {
		.col-sm-4 {
		width: 33.33%;
		}   
	}
	ul {
		list-style: none;
		padding-left: 0;
		li {
			height: 110px;
			margin: 30px 0;
			background-color: $color4;
			border: 10px solid $color3;
			color: $color2;
			font-size: 60px;
		}
	}

	#alert1, #alert2, #alert3 {
		display: none; /* Display only when game is over */
		font-size: 28px;
		background-color: $color1;
		padding: 10px;
		border: 10px solid $color4;
		border-radius: 5px;
		color: $color5;
	}
	#reset {
		font-size: 28px;
		width: 200px;
		background-color: $color1;
		border: 5px solid $color4;
		border-radius: 5px;
		color: $color5;
		margin-top: 20px;
	}
}



.footer {
	margin: 50px;
}
              
            
!

JS

              
                $(document).ready(function(){

	var turns = 0;
	var checkWinner;
	var xCombo = [];
	var oCombo = [];
	
	var possibleWinCombos = [
		[0, 1, 2],
		[0, 3, 6],
		[0, 4, 8],
		[1, 4, 7],
		[2, 4, 6],
		[2, 5, 8],
		[3, 4, 5],
		[6, 7, 8]
	];
	
	// When O clicks on box, 0 should be aded.
	// When X clicks on box, X should be added.
	// Those turns must be added to an array =>
	// xCombo = X's turns
	// oCombo = O's turns
	
	$('li').click(function(){
		
		var alreadySet = $(this).hasClass('set');

		if (alreadySet === true) {
			$('#alert3').show();
			turns + 0;
		}	else {
			turns++; // alternate turns and add X or O to box
			$(this).addClass('set');
			$('#alert3').hide();
		}
		
		if (turns % 2 === 0 && !alreadySet) {
			$(this).text('X'); // all even-numbered turns belong to X
			xCombo.push(parseInt($(this).val())); // Push the value of selected box into xArray
			xCombo.sort();
		} else if (turns % 2 === 1 && !alreadySet) {
			$(this).text('0'); // all odd-numbered turns belong to O
			oCombo.push(parseInt($(this).val())); // Push the value of selected box into oArray
			oCombo.sort();
		}	
		
		// If the intersection of one of the possibleWinCombo[i] arrays matches xCombo or oCombo
		// show the appropriate alert
		for(var i=0; i<possibleWinCombos.length; i++) {

			if (possibleWinCombos[i].length === _.intersection(xCombo, possibleWinCombos[i]).length) {
				$('#alert1').show();
			} else if (possibleWinCombos[i].length === _.intersection(oCombo, possibleWinCombos[i]).length) {
				$('#alert2').show();
			}
		};
	}); // end of click function
	
	
	// Clicking on the Reset button should reset the board
	// Boxes can be selected again => remove 'set' class
	// X/O will be replaced with empty string
	// Arrays are reset
	
	$('#reset').click(function(){
		$('li').removeClass('set'); 
		$('li').text('');
		turns = 0;
		xCombo = []; 
		oCombo = [];
		
		// if game is already over
		$('#alert1').hide();
		$('#alert2').hide();	
	});
	
});
              
            
!
999px

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