accessible_dice/basic_roller.html at master · sleypy/accessible_dice · GitHub

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<html>
	<head>
		<script>
		// This will roll a number of dice at any denomination and can also add a modifier. It does a regex check to make sure the
			function simpleRoll() {
				var diceValue = document.getElementById('diceroll').value; // Grab value
				var dice = diceValue.replace(/\s+/g, '');
				var reBasic = /(\d+)d(\d+)/; // Check if it's in the correct format
				var reModPlus = /(\d+)d(\d+)\+(\d+)/;
				var reModMinus = /(\d+)d(\d+)\-(\d+)/;
				if (reModPlus.test(dice)){
					var res = dice.split("d");
					var number = Number(res[0]); //Number of dice
					var denomMod = res[1]; //Dice denomination and modifier
					var res = denomMod.split("+");
					var denom = Number(res[0]); //Dice denomination
					var modifier = Number(res[1]); //Modifier
					var rollArray = [];
					var rollTotal = modifier;
					for (i = 0; i < number; i++) {
						var roll=Math.floor(Math.random()*denom) + 1; //Get decimal, multiple by denomination and round down, and one so range doesn't start at zero
						rollTotal += roll;
						rollArray.push(roll);
					}
					var rollText = rollTotal + " = " + rollArray.sort(function(a, b){return b-a}).join(' + ') + " + " + modifier; //sort in descending order and add a space between each value
					document.getElementById("results").innerHTML += rollText + "<br />";
				} else if (reModMinus.test(dice)){
					var res = dice.split("d");
					var number = Number(res[0]); //Number of dice
					var denomMod = res[1]; //Dice denomination and modifier
					var res = denomMod.split("-");
					var denom = Number(res[0]); //Dice denomination
					var modifier = Number(res[1]); //Modifier
					var rollArray = [];
					var rollTotal = 0;
					for (i = 0; i < number; i++) {
						var roll=Math.floor(Math.random()*denom) + 1; //Get decimal, multiple by denomination and round down, and one so range doesn't start at zero
						rollTotal += roll;
						rollArray.push(roll);
					}
					rollTotal -= modifier;
					var rollText = rollTotal + " = " + rollArray.sort(function(a, b){return b-a}).join(' + ') + " - " + modifier; //sort in descending order and add a space between each value
					document.getElementById("results").innerHTML += rollText + "<br />";
				} else if (reBasic.test(dice)){
					var res = dice.split("d");
					var number = Number(res[0]); //Number of dice
					var denom = Number(res[1]); //Dice denomination
					var rollArray = [];
					var rollTotal = 0;
					for (i = 0; i < number; i++) {
						var roll=Math.floor(Math.random()*denom) + 1; //Get decimal, multiple by denomination and round down, and one so range doesn't start at zero
						rollTotal += roll;
						rollArray.push(roll);
					}
					var rollText = rollTotal + " = " + rollArray.sort(function(a, b){return b-a}).join(', '); //sort in descending order and add a space between each value
					document.getElementById("results").innerHTML += rollText + "<br />";
				} else {
					document.getElementById("error").innerHTML = "Please use the xdx format";
				};
			};

			function clearRoll() {
				document.getElementById("results").innerHTML = '';
			};
		</script>

		<style>
			#error
				{
				    color: red;
				}
		</style>

	</head>

	<body>

		Enter the dice you want to roll, for example to roll one six-sided die, enter 1d6. For five twelve-sided dice enter 5d12. You can add a modifier like a +1 or -3 so it says 3d10-3.
		<form onsubmit="return false;">
			<input type="text" id="diceroll" onkeydown = "if (event.keyCode == 13)
                        {simpleRoll()}"><br>
			<button type="button" onclick="simpleRoll()">Roll!</button>
			<button type="button" onclick="clearRoll()">Clear</button>
		</form>
		<div id='error'></div>
		<div id='results'></div>
	</body>

</html>