array-diff/demo.html at master · coditect/array-diff · GitHub

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<!DOCTYPE html>
<html>
<head>
	<title>ArrayDiff Demo</title>
	<meta charset="utf8"/>
	<style>

		body {
			font-family: sans-serif;
			margin: 1em;
		}

		p {
			line-height: 1.5;
			margin: 2em 0;
		}

		table {
			border-collapse: collapse;
			line-height: 2;
		}

		th {
			padding: 0 1em 0 0;
			text-align: left;
		}

		input {
			display: block;
			font-family: inherit;
			font-size: inherit;
			height: 2em;
			margin: 0;
			padding: 0 0.5em;
			width: 16em;
		}

		button {
			display: block;
			margin: 1em 0;
			width: 100%;
		}

		td {
			border: 1px solid #000;
			min-width: 2em;
			padding: 0;
			text-align: center;
		}

		.added   {background-color: #cfc}
		.removed {background-color: #fcc}

		.old .added   {color: #9c9}
		.new .removed {color: #c99}

	</style>
	<script src="ArrayDiffElement.js"></script>
	<script src="ArrayDiff.js"></script>
	<script>

		window.onload = function() {

			var table = document.getElementsByTagName('table')[0],
				newInput = document.getElementById('new'),
				oldInput = document.getElementById('old');

			function clearTable() {
				var cells = document.getElementsByTagName('td');
				while (cells.length > 0) {
					cells[0].parentNode.removeChild(cells[0]);
				}
			}

			function addCell(row, content, className) {
				var element = document.createElement('td');
				element.textContent = content;
				element.className = className;
				table.rows[row].appendChild(element);
			}

			function getDiff() {
				clearTable();
				var arrayDiff = new ArrayDiff(newInput.value, oldInput.value);

				for (var i = 0; i < arrayDiff.diff.length; i++) {

					if (arrayDiff.diff[i].added()) {
						addCell(0, '∅', 'added');
						addCell(1, '+', 'added');
						addCell(2, arrayDiff.diff[i].item, 'added');
					}
					else if (arrayDiff.diff[i].removed()) {
						addCell(0, arrayDiff.diff[i].item, 'removed');
						addCell(1, '−', 'removed');
						addCell(2, '∅', 'removed');
					}
					else {
						addCell(0, arrayDiff.diff[i].item, '');
						addCell(1, '↓', '');
						addCell(2, arrayDiff.diff[i].item, '');
					}
				}
			}

			newInput.onkeyup = getDiff;
			oldInput.onkeyup = getDiff;
			getDiff();
		};

	</script>
</head>
<body>
	<h1>ArrayDiff Demo</h1>
	<p>ArrayDiff computes the difference between two JavaScript arrays (as well as any other object that uses numeric subscripts, such as a string or DOMNodeList) by finding the longest common subsequence between them. The result can be used to visualize the transformation of one array to another, as demonstrated below.</p>
	<table>
		<tr class="old">
			<th><label for="old">Old</label></th>
			<th><input type="text" id="old" value="nematode knowledge"/></th>
		</tr>
		<tr>
			<th colspan="2"></th>
		</tr>
		<tr class="new">
			<th><label for="new">New</label></th>
			<th><input type="text" id="new" value="empty bottle"/></th>
		</tr>
	</table>
</body>
</html>