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CSS

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <p><em>Data from <a href="https://wikitech.wikimedia.org/wiki/Special:PrefixIndex?prefix=Incident+documentation%2F&namespace=0&hideredirects=1&stripprefix=1" target="_blank">wikitech.wikimedia.org</a>.</em></p>
<hr/>
<h2>Overview</h2>
<div id="x-overview" x-pending></div>
<hr style="clear: both;"/>
<label>Year <select id="x-year">
	<option value="" disabled selected>Select a year</option>
</select></label>
<hr/>
<h2>Breakdown for <span id="x-title-year">…</span></h2>
<div id="x-breakdown" x-pending></div>
<h3>Table</h3>
<div id="x-table" x-pending></div>
<h3>TSV (Tab-separated-values)</h3>
<div id="x-tsv" x-pending></div>
            
          
!

CSS

            
              html,
body {
	margin: 0;
	padding: 0;
}

body {
	background: #fff;
	padding: 0.5em 1em;
	font: 14px/21px sans-serif;
	color: #333;
}

[x-pending]:empty:before {
	display: inline-block;
	pointer-events: none;
	font-style: italic;
	opacity: 0.75;
	border: 1px solid #ccc;
	padding: 1em 2em;
	content: '(Loading…)';
}

.chart {
	display: inline-block;
	border: 1px solid #ccc;
	margin: 0 0.5em 0.5em 0;
	padding: 0 0 0 1em;
	position: relative;
}

.chart:before {
	display: inline-block;
	content: attr(data-chart-ymax);
	position: absolute;
	box-sizing: border-box;
	top: 2.4em;
	left: 0;
	padding-left: 0.5em;
	font-size: 0.7em;
	box-sizing: border-box;
	width: auto;
	border-top: 1px solid #eee;
}

.chart:after {
	display: block;
	content: '0';
	position: absolute;
	bottom: 2em;
	left: 0;
	padding-left: 0.5em;
	font-size: 0.7em;
	box-sizing: border-box;
	width: auto;
	border-bottom: 1px solid #eee;
}

.chart h3 {
	text-align: center;
	margin: 0.2em 0 0;
	color: #777;
}

.chart-column {
	display: inline-block;
	margin: 0 0.1em;
	color: #555;
}
.chart-column:hover:after,
.chart-column:focus:after {
	position: absolute;
	top: -1em;
	right: 0.5em;
	z-index: 1;
	display: block;
	background: rgba(255, 255, 255, 0.9);
	padding: 0.2em 0.3em;
	content: attr(data-title);
	white-space: nowrap;
	border: 1px solid #aaa;
	box-shadow: 1px 1px 10px #ccc;
}

.chart-column-bar {
	display: block;
	width: 1em;
	height: 1px;
	min-height: 1px;
	background: darkcyan;
}

.chart-column-label {
	font-size: 0.7em;
}

table {
	background-color: #f8f9fa;
	color: #222;
	margin: 1em 0;
	border: 1px solid #a2a9b1;
	border-collapse: collapse;
}
td,
th {
	border: 1px solid #a2a9b1;
	padding: 0.2em 0.4em;
}
th {
	background-color: #eaecf0;
}
pre {
	font-family: monospace, monospace;
	color: #000;
	background-color: #f8f9fa;
	border: 1px solid #eaecf0;
	padding: 1em;
	white-space: pre-wrap;
	line-height: 1.3em;
	overflow-wrap: break-word;
}

            
          
!

JS

            
              const DOM = {
	empty: function(node) {
		while (node.lastChild) {
			node.removeChild(node.lastChild);
		}
	},
	create: function(tagName, text) {
		const el = document.createElement(tagName);
		if (text !== undefined) el.textContent = text;
		return el;
	}
};

async function fetchIncidentStats(year) {
	// TODO: This may need to handle continuation at some point,
	// but for now the total fits within the max limit per query.
	// https://www.mediawiki.org/wiki/API:Query#Continuing_queries
	let prefix = "Incident_documentation/" + year;
	let apiUrl =
		"https://wikitech.wikimedia.org/w/api.php?origin=*&format=json&action=query&prop=info&list=prefixsearch&indexpageids=1&pssearch=" +
		encodeURIComponent(prefix) +
		"&psprofile=strict&pslimit=max";
	let resp = await fetch(apiUrl, { mode: "cors" });
	let data = await resp.json();
	if (data.error) {
		throw new Error("API Error: " + JSON.stringify(data.error));
	}

	let byMonth = {};
	// Fill with zeroes
	let monthIdx = 12;
	while (monthIdx--) {
		byMonth[1 + monthIdx] = 0;
	}
	let titles = data.query.prefixsearch.map(info => info.title);
	titles.forEach(title => {
		let monthIdx = Number(title.slice(prefix.length).slice(0, 2));
		byMonth[monthIdx]++;
	});
	return {
		year: year,
		total: titles.length,
		byMonth: byMonth
	};
}

function getMonthName(monthNr, monthType) {
	monthType = monthType || "long";
	let fmt = getMonthName.formatters[monthType];
	if (fmt === undefined) {
		if (window.Intl && Intl.DateTimeFormat) {
			fmt = new Intl.DateTimeFormat("en-US", {
				month: monthType
			});
		} else {
			fmt = null;
		}
		getMonthName.formatters[monthType] = fmt;
	}
	if (fmt) {
		return fmt.format(new Date(2011, monthNr - 1, 1));
	} else {
		return "Month " + monthNr;
	}
}
getMonthName.formatters = Object.create(null);

function renderStats(stats) {
	// Render breakdown
	let yearPos = document.querySelector("#x-title-year");
	yearPos.textContent = stats.year;
	let overviewPos = document.querySelector("#x-breakdown");

	let numbers = Object.values(stats.byMonth);
	numbers.sort((a, b) => a - b);
	// Assume even count, which months of a year are...
	let median = numbers[Math.floor(numbers.length / 2)];
	let max = Math.max(...numbers);
	overviewPos.innerHTML = `
<p>${stats.year} had ${stats.total} documented incidents.</p>
<p>Max: ${max} per month.</p>
<p>Median: ${median} per month</p>
`;

	// Render table
	let tableNode = document.createElement("table");
	let row, cell;

	row = tableNode.insertRow();
	cell = DOM.create("th", "Month in " + stats.year);
	row.append(cell);
	cell = DOM.create("th", "# of incidents");
	row.append(cell);
	for (let [key, value] of Object.entries(stats.byMonth)) {
		row = tableNode.insertRow();
		cell = document.createElement("th");
		cell = row.insertCell();
		cell.textContent = getMonthName(key);
		cell = row.insertCell();
		cell.textContent = value;
	}

	// Inser table
	let tablePos = document.querySelector("#x-table");
	DOM.empty(tablePos);
	tablePos.append(tableNode);

	// Render TSV
	let tsvNode = document.createElement("pre");
	let preText = "Month in " + stats.year + "\t" + "Incidents" + "\n";
	for (let [key, value] of Object.entries(stats.byMonth)) {
		preText += getMonthName(key) + "\t" + value + "\n";
	}
	tsvNode.textContent = preText;

	// Insert TSV
	let tsvPos = document.querySelector("#x-tsv");
	DOM.empty(tsvPos);
	tsvPos.append(tsvNode);
}

function addOverviewChart(year) {
	let overviewNode = document.querySelector("#x-overview");
	let chartNode = DOM.create("div");
	chartNode.className = "chart";
	// Append early so as to ensure order
	overviewNode.append(chartNode);

	fetchIncidentStats(year).then(function(stats) {
		chartNode.append(DOM.create("h3", stats.year));
		const maxHeightEm = 4;
		// Get highest
		let actualHighest = 1;
		for (let [, value] of Object.entries(stats.byMonth)) {
			actualHighest = Math.max(actualHighest, value);
		}
		chartNode.setAttribute("data-chart-ymax", actualHighest);
		for (let [monthNum, value] of Object.entries(stats.byMonth)) {
			let column = DOM.create("span");
			column.className = "chart-column";
			column.dataset.title = getMonthName(monthNum) + ': ' + value + ' incidents';
			column.tabIndex = '0';

			let bar = DOM.create("span");
			bar.className = "chart-column-bar";
			let height = value / actualHighest * maxHeightEm;
			bar.style.height = height + "em";

			let label = DOM.create("span", getMonthName(monthNum, "short"));
			label.className = "chart-column-label";
			column.append(bar, label);
			chartNode.append(column);
		}
		/*byMonth: {1: 0, 2: 0, 3: 0, 4: 0, 5: 1, 6: 1, 7: 1, 8: 0, 9: 4, 10: 0, 11: 1, 12: 0}
total: 8
year: 2011
	for (let [key, value] of Object.entries(stats.byMonth)) {
		row = tableNode.insertRow();
		cell = document.createElement("th");
		cell = row.insertCell();
		cell = row.insertCell();
		cell.textContent = value;
*/
	});
}

function init() {
	document.documentElement.lang = "en-US";

	let currentYear = new Date().getUTCFullYear();
	let minYear = 2011;

	let yearSelect = document.querySelector("#x-year");
	let year = currentYear;
	do {
		let option = document.createElement("option");
		option.value = option.textContent = year;
		option.selected = year === currentYear;
		yearSelect.add(option);
		addOverviewChart(year);
		year--;
	} while (year >= minYear);

	yearSelect.oninput = function() {
		fetchIncidentStats(this.value).then(renderStats);
	};

	fetchIncidentStats(currentYear).then(renderStats);
}

init();

            
          
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