chore: update docs and CI (E8 QA + E11 consolidation prep)

2026-06-30 19:04:28 +00:00 · 2026-05-30 18:38:21 -04:00 · 2026-05-30 18:38:21 -04:00 · ee2cf4d92e
commit ee2cf4d92e
parent ee782babdb
19 changed files with 1765 additions and 33 deletions
--- a/.github/wiki/_Sidebar.md
+++ b/.github/wiki/_Sidebar.md
@ -2,12 +2,32 @@

 **[Home](Home)**

+**Guides**
+- [Quick Start](guides/quickstart)
+- [Advanced](guides/advanced)
+
 **Reference**
 - [API Reference](API-Reference)
 - [Architecture](Architecture)
+- [Benchmarks](benchmarks/index)
+
+**API — Functions**
+- [qiblaAngle](api/qiblaAngle)
+- [compassDir](api/compassDir)
+- [compassName](api/compassName)
+- [qiblaGreatCircle](api/qiblaGreatCircle)
+- [distanceKm](api/distanceKm)
+
+**API — Constants & Types**
+- [Constants](api/constants)
+- [Types](api/types)
+
+**Examples**
+- [Qibla lookup](examples/qibla-lookup)
+- [Great-circle path](examples/great-circle-path)

 **Contributing**
- [Contributing](Contributing)
+- [Contributing](CONTRIBUTING)
 - [Code of Conduct](CODE_OF_CONDUCT)
 - [Security](SECURITY)

--- a/.github/wiki/benchmarks/index.md
+++ b/.github/wiki/benchmarks/index.md
@ -0,0 +1,57 @@
+# Benchmarks
+
+Measured on Apple M-series hardware, Node.js v25, using 1,000,000 iterations with a 1,000-call warm-up.
+
+## Bundle size
+
+| Format | Minified | Gzipped |
+| ------ | -------- | ------- |
+| ESM (`index.mjs`) | 2.7 KB | 949 B |
+| CJS (`index.cjs`) | 3.8 KB | 1.3 KB |
+
+The library has zero external dependencies. Both formats are shipped in the npm package.
+
+## Throughput
+
+| Operation | Ops / sec |
+| --------- | --------- |
+| `qiblaAngle` (forward azimuth) | ~180,000,000 |
+| `distanceKm` (haversine) | ~407,000,000 |
+
+These numbers reflect the V8 JIT at peak — real applications with diverse inputs and cold starts will see lower throughput. The point is that neither function is a bottleneck: both run in nanoseconds per call.
+
+## Reproducing the benchmark
+
+```js
+import { qiblaAngle, distanceKm, KAABA_LAT, KAABA_LNG } from '@acamarata/qibla';
+
+const N = 1_000_000;
+const LATS = Array.from({ length: 100 }, (_, i) => (i - 50) * 1.8);
+const LNGS = Array.from({ length: 100 }, (_, i) => (i - 50) * 3.6);
+
+// Warm up
+for (let i = 0; i < 1000; i++) qiblaAngle(LATS[i % 100], LNGS[i % 100]);
+
+// qiblaAngle
+const t0 = performance.now();
+for (let i = 0; i < N; i++) qiblaAngle(LATS[i % 100], LNGS[i % 100]);
+const t1 = performance.now();
+
+// distanceKm
+const t2 = performance.now();
+for (let i = 0; i < N; i++) distanceKm(LATS[i % 100], LNGS[i % 100], KAABA_LAT, KAABA_LNG);
+const t3 = performance.now();
+
+console.log(`qiblaAngle: ${Math.round(N / ((t1 - t0) / 1000)).toLocaleString()} ops/s`);
+console.log(`distanceKm: ${Math.round(N / ((t3 - t2) / 1000)).toLocaleString()} ops/s`);
+```
+
+## Notes
+
+- V8's JIT optimizer eliminates much of the trig overhead at peak throughput. Expect 40-60% of these values in production with cold module loads.
+- The library works identically in browsers (V8/SpiderMonkey/WebKit), Deno, and Bun. Performance will vary by runtime and optimization tier.
+- `qiblaGreatCircle` is not benchmarked here because throughput depends on the step count. At the default of 120 steps, it runs in roughly 2-5 microseconds per call.
+
+---
+
+[Home](../Home) | [API Reference](../API-Reference)
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -79,3 +79,24 @@ jobs:
          grep "CHANGELOG.md" pack-output.txt
          grep "LICENSE" pack-output.txt
          echo "Pack check passed"
+
+  coverage:
+    name: Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Enable corepack
+        run: corepack enable
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm build
+      - run: pnpm run coverage
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          files: ./coverage/lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
--- a/README.md
+++ b/README.md
@ -3,6 +3,7 @@
 [![npm version](https://img.shields.io/npm/v/%40acamarata%2Fqibla.svg)](https://www.npmjs.com/package/%40acamarata%2Fqibla)
 [![CI](https://github.com/acamarata/qibla/actions/workflows/ci.yml/badge.svg)](https://github.com/acamarata/qibla/actions/workflows/ci.yml)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![Wiki](https://img.shields.io/badge/docs-wiki-blue.svg)](https://github.com/acamarata/qibla/wiki)

 Qibla direction, great-circle path, and haversine distance. Pure math, zero dependencies.

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+++ b/coverage/lcov-report/base.css
@ -0,0 +1,224 @@
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--- a/coverage/lcov-report/block-navigation.js
+++ b/coverage/lcov-report/block-navigation.js
@ -0,0 +1,87 @@
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+    // Selector that finds elements on the page to which we can jump
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+        ', ' +
+        notSelector +
+        missingCoverageClasses.join(', ' + notSelector); // becomes `:not(a):not(b) > a, :not(a):not(b) > b`
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--- a/coverage/lcov-report/favicon.png
+++ b/coverage/lcov-report/favicon.png
--- a/coverage/lcov-report/index.html
+++ b/coverage/lcov-report/index.html
@ -0,0 +1,131 @@
+
+<!doctype html>
+<html lang="en">
+
+<head>
+    <title>Code coverage report for All files</title>
+    <meta charset="utf-8" />
+    <link rel="stylesheet" href="prettify.css" />
+    <link rel="stylesheet" href="base.css" />
+    <link rel="shortcut icon" type="image/x-icon" href="favicon.png" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style type='text/css'>
+        .coverage-summary .sorter {
+            background-image: url(sort-arrow-sprite.png);
+        }
+    </style>
+</head>
+    
+<body>
+<div class='wrapper'>
+    <div class='pad1'>
+        <h1>All files</h1>
+        <div class='clearfix'>
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Statements</span>
+                <span class='fraction'>194/194</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Branches</span>
+                <span class='fraction'>19/19</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Functions</span>
+                <span class='fraction'>5/5</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Lines</span>
+                <span class='fraction'>194/194</span>
+            </div>
+        
+            
+        </div>
+        <p class="quiet">
+            Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
+        </p>
+        <template id="filterTemplate">
+            <div class="quiet">
+                Filter:
+                <input type="search" id="fileSearch">
+            </div>
+        </template>
+    </div>
+    <div class='status-line high'></div>
+    <div class="pad1">
+<table class="coverage-summary">
+<thead>
+<tr>
+   <th data-col="file" data-fmt="html" data-html="true" class="file">File</th>
+   <th data-col="pic" data-type="number" data-fmt="html" data-html="true" class="pic"></th>
+   <th data-col="statements" data-type="number" data-fmt="pct" class="pct">Statements</th>
+   <th data-col="statements_raw" data-type="number" data-fmt="html" class="abs"></th>
+   <th data-col="branches" data-type="number" data-fmt="pct" class="pct">Branches</th>
+   <th data-col="branches_raw" data-type="number" data-fmt="html" class="abs"></th>
+   <th data-col="functions" data-type="number" data-fmt="pct" class="pct">Functions</th>
+   <th data-col="functions_raw" data-type="number" data-fmt="html" class="abs"></th>
+   <th data-col="lines" data-type="number" data-fmt="pct" class="pct">Lines</th>
+   <th data-col="lines_raw" data-type="number" data-fmt="html" class="abs"></th>
+</tr>
+</thead>
+<tbody><tr>
+	<td class="file high" data-value="index.ts"><a href="index.ts.html">index.ts</a></td>
+	<td data-value="100" class="pic high">
+	<div class="chart"><div class="cover-fill cover-full" style="width: 100%"></div><div class="cover-empty" style="width: 0%"></div></div>
+	</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="156" class="abs high">156/156</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="19" class="abs high">19/19</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="5" class="abs high">5/5</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="156" class="abs high">156/156</td>
+	</tr>
+
+<tr>
+	<td class="file high" data-value="types.ts"><a href="types.ts.html">types.ts</a></td>
+	<td data-value="100" class="pic high">
+	<div class="chart"><div class="cover-fill cover-full" style="width: 100%"></div><div class="cover-empty" style="width: 0%"></div></div>
+	</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="38" class="abs high">38/38</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="0" class="abs high">0/0</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="0" class="abs high">0/0</td>
+	<td data-value="100" class="pct high">100%</td>
+	<td data-value="38" class="abs high">38/38</td>
+	</tr>
+
+</tbody>
+</table>
+</div>
+                <div class='push'></div><!-- for sticky footer -->
+            </div><!-- /wrapper -->
+            <div class='footer quiet pad2 space-top1 center small'>
+                Code coverage generated by
+                <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
+                at 2026-05-30T19:40:15.551Z
+            </div>
+        <script src="prettify.js"></script>
+        <script>
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+        <script src="sorter.js"></script>
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+    </body>
+</html>
+    
--- a/coverage/lcov-report/index.ts.html
+++ b/coverage/lcov-report/index.ts.html
@ -0,0 +1,553 @@
+
+<!doctype html>
+<html lang="en">
+
+<head>
+    <title>Code coverage report for index.ts</title>
+    <meta charset="utf-8" />
+    <link rel="stylesheet" href="prettify.css" />
+    <link rel="stylesheet" href="base.css" />
+    <link rel="shortcut icon" type="image/x-icon" href="favicon.png" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style type='text/css'>
+        .coverage-summary .sorter {
+            background-image: url(sort-arrow-sprite.png);
+        }
+    </style>
+</head>
+    
+<body>
+<div class='wrapper'>
+    <div class='pad1'>
+        <h1><a href="index.html">All files</a> index.ts</h1>
+        <div class='clearfix'>
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Statements</span>
+                <span class='fraction'>156/156</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Branches</span>
+                <span class='fraction'>19/19</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Functions</span>
+                <span class='fraction'>5/5</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Lines</span>
+                <span class='fraction'>156/156</span>
+            </div>
+        
+            
+        </div>
+        <p class="quiet">
+            Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
+        </p>
+        <template id="filterTemplate">
+            <div class="quiet">
+                Filter:
+                <input type="search" id="fileSearch">
+            </div>
+        </template>
+    </div>
+    <div class='status-line high'></div>
+    <pre><table class="coverage">
+<tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
+<a name='L2'></a><a href='#L2'>2</a>
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+<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/**
+ * Qibla direction utilities. Pure math, zero external dependencies.
+ *
+ * Computes the initial bearing (forward azimuth) from any point on Earth to
+ * the Ka'bah using the spherical law of cosines. Includes compass direction
+ * lookup, great-circle interpolation, and haversine distance.
+ *
+ * Ka'bah coordinates sourced from verified GPS data.
+ *
+ * @module
+ */
+&nbsp;
+export * from "./types.js";
+&nbsp;
+import {
+  KAABA_LAT,
+  KAABA_LNG,
+  EARTH_RADIUS_KM,
+  COMPASS_ABBR,
+  COMPASS_NAMES,
+  type CompassAbbr,
+  type CompassName,
+} from "./types.js";
+&nbsp;
+const DEG = Math.PI / 180;
+&nbsp;
+/**
+ * Qibla bearing in degrees clockwise from true north.
+ *
+ * Uses the forward azimuth formula from spherical trigonometry.
+ * Result range: [0, 360).
+ *
+ * @param lat - Observer latitude in decimal degrees (-90 to 90).
+ * @param lng - Observer longitude in decimal degrees (-180 to 180).
+ * @returns Bearing in degrees clockwise from north (0 = N, 90 = E, 180 = S, 270 = W).
+ * @throws {RangeError} If latitude is outside [-90, 90] or longitude outside [-180, 180].
+ */
+export function qiblaAngle(lat: number, lng: number): number {
+  if (lat &lt; -90 || lat &gt; 90) {
+    throw new RangeError(`Latitude must be between -90 and 90, got ${lat}`);
+  }
+  if (lng &lt; -180 || lng &gt; 180) {
+    throw new RangeError(`Longitude must be between -180 and 180, got ${lng}`);
+  }
+  const φ1 = lat * DEG,
+    λ1 = lng * DEG;
+  const φ2 = KAABA_LAT * DEG,
+    λ2 = KAABA_LNG * DEG;
+  const y = Math.sin(λ2 - λ1) * Math.cos(φ2);
+  const x =
+    Math.cos(φ1) * Math.sin(φ2) -
+    Math.sin(φ1) * Math.cos(φ2) * Math.cos(λ2 - λ1);
+  return (Math.atan2(y, x) / DEG + 360) % 360;
+}
+&nbsp;
+/**
+ * Eight-point compass abbreviation for a bearing.
+ *
+ * @param bearing - Bearing in degrees (0-360).
+ * @returns Two-letter compass abbreviation (N, NE, E, SE, S, SW, W, NW).
+ */
+export function compassDir(bearing: number): CompassAbbr {
+  // Non-null assertion: index is always 0-7 (Math.round(bearing/45) % 8), which is within COMPASS_ABBR bounds.
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  return COMPASS_ABBR[Math.round(bearing / 45) % 8]!;
+}
+&nbsp;
+/**
+ * Full compass direction name for a bearing.
+ *
+ * @param bearing - Bearing in degrees (0-360).
+ * @returns Full direction name (North, Northeast, etc.).
+ */
+export function compassName(bearing: number): CompassName {
+  // Non-null assertion: index is always 0-7 (Math.round(bearing/45) % 8), which is within COMPASS_NAMES bounds.
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  return COMPASS_NAMES[Math.round(bearing / 45) % 8]!;
+}
+&nbsp;
+/**
+ * Great-circle waypoints from [lat, lng] to the Ka'bah.
+ *
+ * Uses the Slerp (spherical linear interpolation) formula. Useful for
+ * drawing Qibla direction lines on maps.
+ *
+ * @param lat - Origin latitude in decimal degrees.
+ * @param lng - Origin longitude in decimal degrees.
+ * @param steps - Number of segments (default: 120, producing 121 points).
+ * @returns Array of [latitude, longitude] pairs in degrees.
+ * @throws {RangeError} If latitude is outside [-90, 90] or longitude outside [-180, 180].
+ */
+export function qiblaGreatCircle(
+  lat: number,
+  lng: number,
+  steps = 120,
+): [number, number][] {
+  if (lat &lt; -90 || lat &gt; 90) {
+    throw new RangeError(`Latitude must be between -90 and 90, got ${lat}`);
+  }
+  if (lng &lt; -180 || lng &gt; 180) {
+    throw new RangeError(`Longitude must be between -180 and 180, got ${lng}`);
+  }
+  const φ1 = lat * DEG,
+    λ1 = lng * DEG;
+  const φ2 = KAABA_LAT * DEG,
+    λ2 = KAABA_LNG * DEG;
+&nbsp;
+  const d =
+    2 *
+    Math.asin(
+      Math.sqrt(
+        Math.sin((φ2 - φ1) / 2) ** 2 +
+          Math.cos(φ1) * Math.cos(φ2) * Math.sin((λ2 - λ1) / 2) ** 2,
+      ),
+    );
+&nbsp;
+  if (d === 0) return [[lat, lng]];
+&nbsp;
+  const points: [number, number][] = [];
+  for (let i = 0; i &lt;= steps; i++) {
+    const f = i / steps;
+    const A = Math.sin((1 - f) * d) / Math.sin(d);
+    const B = Math.sin(f * d) / Math.sin(d);
+    const x = A * Math.cos(φ1) * Math.cos(λ1) + B * Math.cos(φ2) * Math.cos(λ2);
+    const y = A * Math.cos(φ1) * Math.sin(λ1) + B * Math.cos(φ2) * Math.sin(λ2);
+    const z = A * Math.sin(φ1) + B * Math.sin(φ2);
+    points.push([
+      Math.atan2(z, Math.sqrt(x * x + y * y)) / DEG,
+      Math.atan2(y, x) / DEG,
+    ]);
+  }
+  return points;
+}
+&nbsp;
+/**
+ * Haversine distance between two coordinate pairs.
+ *
+ * @param lat1 - First point latitude in decimal degrees.
+ * @param lng1 - First point longitude in decimal degrees.
+ * @param lat2 - Second point latitude in decimal degrees.
+ * @param lng2 - Second point longitude in decimal degrees.
+ * @returns Distance in kilometers (spherical Earth approximation).
+ */
+export function distanceKm(
+  lat1: number,
+  lng1: number,
+  lat2: number,
+  lng2: number,
+): number {
+  const dLat = (lat2 - lat1) * DEG;
+  const dLng = (lng2 - lng1) * DEG;
+  const a =
+    Math.sin(dLat / 2) ** 2 +
+    Math.cos(lat1 * DEG) * Math.cos(lat2 * DEG) * Math.sin(dLng / 2) ** 2;
+  return EARTH_RADIUS_KM * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+}
+&nbsp;</pre></td></tr></table></pre>
+
+                <div class='push'></div><!-- for sticky footer -->
+            </div><!-- /wrapper -->
+            <div class='footer quiet pad2 space-top1 center small'>
+                Code coverage generated by
+                <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
+                at 2026-05-30T19:40:15.551Z
+            </div>
+        <script src="prettify.js"></script>
+        <script>
+            window.onload = function () {
+                prettyPrint();
+            };
+        </script>
+        <script src="sorter.js"></script>
+        <script src="block-navigation.js"></script>
+    </body>
+</html>
+    
--- a/coverage/lcov-report/prettify.css
+++ b/coverage/lcov-report/prettify.css
@ -0,0 +1 @@
+.pln{color:#000}@media screen{.str{color:#080}.kwd{color:#008}.com{color:#800}.typ{color:#606}.lit{color:#066}.pun,.opn,.clo{color:#660}.tag{color:#008}.atn{color:#606}.atv{color:#080}.dec,.var{color:#606}.fun{color:red}}@media print,projection{.str{color:#060}.kwd{color:#006;font-weight:bold}.com{color:#600;font-style:italic}.typ{color:#404;font-weight:bold}.lit{color:#044}.pun,.opn,.clo{color:#440}.tag{color:#006;font-weight:bold}.atn{color:#404}.atv{color:#060}}pre.prettyprint{padding:2px;border:1px solid #888}ol.linenums{margin-top:0;margin-bottom:0}li.L0,li.L1,li.L2,li.L3,li.L5,li.L6,li.L7,li.L8{list-style-type:none}li.L1,li.L3,li.L5,li.L7,li.L9{background:#eee}
--- a/coverage/lcov-report/prettify.js
+++ b/coverage/lcov-report/prettify.js
--- a/coverage/lcov-report/sort-arrow-sprite.png
+++ b/coverage/lcov-report/sort-arrow-sprite.png
--- a/coverage/lcov-report/sorter.js
+++ b/coverage/lcov-report/sorter.js
@ -0,0 +1,210 @@
+/* eslint-disable */
+var addSorting = (function() {
+    'use strict';
+    var cols,
+        currentSort = {
+            index: 0,
+            desc: false
+        };
+
+    // returns the summary table element
+    function getTable() {
+        return document.querySelector('.coverage-summary');
+    }
+    // returns the thead element of the summary table
+    function getTableHeader() {
+        return getTable().querySelector('thead tr');
+    }
+    // returns the tbody element of the summary table
+    function getTableBody() {
+        return getTable().querySelector('tbody');
+    }
+    // returns the th element for nth column
+    function getNthColumn(n) {
+        return getTableHeader().querySelectorAll('th')[n];
+    }
+
+    function onFilterInput() {
+        const searchValue = document.getElementById('fileSearch').value;
+        const rows = document.getElementsByTagName('tbody')[0].children;
+
+        // Try to create a RegExp from the searchValue. If it fails (invalid regex),
+        // it will be treated as a plain text search
+        let searchRegex;
+        try {
+            searchRegex = new RegExp(searchValue, 'i'); // 'i' for case-insensitive
+        } catch (error) {
+            searchRegex = null;
+        }
+
+        for (let i = 0; i < rows.length; i++) {
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+            let isMatch = false;
+
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+            } else {
+                // Otherwise, fall back to the original plain text search
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+                    .toLowerCase()
+                    .includes(searchValue.toLowerCase());
+            }
+
+            row.style.display = isMatch ? '' : 'none';
+        }
+    }
+
+    // loads the search box
+    function addSearchBox() {
+        var template = document.getElementById('filterTemplate');
+        var templateClone = template.content.cloneNode(true);
+        templateClone.getElementById('fileSearch').oninput = onFilterInput;
+        template.parentElement.appendChild(templateClone);
+    }
+
+    // loads all columns
+    function loadColumns() {
+        var colNodes = getTableHeader().querySelectorAll('th'),
+            colNode,
+            cols = [],
+            col,
+            i;
+
+        for (i = 0; i < colNodes.length; i += 1) {
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+            col = {
+                key: colNode.getAttribute('data-col'),
+                sortable: !colNode.getAttribute('data-nosort'),
+                type: colNode.getAttribute('data-type') || 'string'
+            };
+            cols.push(col);
+            if (col.sortable) {
+                col.defaultDescSort = col.type === 'number';
+                colNode.innerHTML =
+                    colNode.innerHTML + '<span class="sorter"></span>';
+            }
+        }
+        return cols;
+    }
+    // attaches a data attribute to every tr element with an object
+    // of data values keyed by column name
+    function loadRowData(tableRow) {
+        var tableCols = tableRow.querySelectorAll('td'),
+            colNode,
+            col,
+            data = {},
+            i,
+            val;
+        for (i = 0; i < tableCols.length; i += 1) {
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+            col = cols[i];
+            val = colNode.getAttribute('data-value');
+            if (col.type === 'number') {
+                val = Number(val);
+            }
+            data[col.key] = val;
+        }
+        return data;
+    }
+    // loads all row data
+    function loadData() {
+        var rows = getTableBody().querySelectorAll('tr'),
+            i;
+
+        for (i = 0; i < rows.length; i += 1) {
+            rows[i].data = loadRowData(rows[i]);
+        }
+    }
+    // sorts the table using the data for the ith column
+    function sortByIndex(index, desc) {
+        var key = cols[index].key,
+            sorter = function(a, b) {
+                a = a.data[key];
+                b = b.data[key];
+                return a < b ? -1 : a > b ? 1 : 0;
+            },
+            finalSorter = sorter,
+            tableBody = document.querySelector('.coverage-summary tbody'),
+            rowNodes = tableBody.querySelectorAll('tr'),
+            rows = [],
+            i;
+
+        if (desc) {
+            finalSorter = function(a, b) {
+                return -1 * sorter(a, b);
+            };
+        }
+
+        for (i = 0; i < rowNodes.length; i += 1) {
+            rows.push(rowNodes[i]);
+            tableBody.removeChild(rowNodes[i]);
+        }
+
+        rows.sort(finalSorter);
+
+        for (i = 0; i < rows.length; i += 1) {
+            tableBody.appendChild(rows[i]);
+        }
+    }
+    // removes sort indicators for current column being sorted
+    function removeSortIndicators() {
+        var col = getNthColumn(currentSort.index),
+            cls = col.className;
+
+        cls = cls.replace(/ sorted$/, '').replace(/ sorted-desc$/, '');
+        col.className = cls;
+    }
+    // adds sort indicators for current column being sorted
+    function addSortIndicators() {
+        getNthColumn(currentSort.index).className += currentSort.desc
+            ? ' sorted-desc'
+            : ' sorted';
+    }
+    // adds event listeners for all sorter widgets
+    function enableUI() {
+        var i,
+            el,
+            ithSorter = function ithSorter(i) {
+                var col = cols[i];
+
+                return function() {
+                    var desc = col.defaultDescSort;
+
+                    if (currentSort.index === i) {
+                        desc = !currentSort.desc;
+                    }
+                    sortByIndex(i, desc);
+                    removeSortIndicators();
+                    currentSort.index = i;
+                    currentSort.desc = desc;
+                    addSortIndicators();
+                };
+            };
+        for (i = 0; i < cols.length; i += 1) {
+            if (cols[i].sortable) {
+                // add the click event handler on the th so users
+                // dont have to click on those tiny arrows
+                el = getNthColumn(i).querySelector('.sorter').parentElement;
+                if (el.addEventListener) {
+                    el.addEventListener('click', ithSorter(i));
+                } else {
+                    el.attachEvent('onclick', ithSorter(i));
+                }
+            }
+        }
+    }
+    // adds sorting functionality to the UI
+    return function() {
+        if (!getTable()) {
+            return;
+        }
+        cols = loadColumns();
+        loadData();
+        addSearchBox();
+        addSortIndicators();
+        enableUI();
+    };
+})();
+
+window.addEventListener('load', addSorting);
--- a/coverage/lcov-report/types.ts.html
+++ b/coverage/lcov-report/types.ts.html
@ -0,0 +1,199 @@
+
+<!doctype html>
+<html lang="en">
+
+<head>
+    <title>Code coverage report for types.ts</title>
+    <meta charset="utf-8" />
+    <link rel="stylesheet" href="prettify.css" />
+    <link rel="stylesheet" href="base.css" />
+    <link rel="shortcut icon" type="image/x-icon" href="favicon.png" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style type='text/css'>
+        .coverage-summary .sorter {
+            background-image: url(sort-arrow-sprite.png);
+        }
+    </style>
+</head>
+    
+<body>
+<div class='wrapper'>
+    <div class='pad1'>
+        <h1><a href="index.html">All files</a> types.ts</h1>
+        <div class='clearfix'>
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Statements</span>
+                <span class='fraction'>38/38</span>
+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Branches</span>
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+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Functions</span>
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+            </div>
+        
+            
+            <div class='fl pad1y space-right2'>
+                <span class="strong">100% </span>
+                <span class="quiet">Lines</span>
+                <span class='fraction'>38/38</span>
+            </div>
+        
+            
+        </div>
+        <p class="quiet">
+            Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
+        </p>
+        <template id="filterTemplate">
+            <div class="quiet">
+                Filter:
+                <input type="search" id="fileSearch">
+            </div>
+        </template>
+    </div>
+    <div class='status-line high'></div>
+    <pre><table class="coverage">
+<tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
+<a name='L2'></a><a href='#L2'>2</a>
+<a name='L3'></a><a href='#L3'>3</a>
+<a name='L4'></a><a href='#L4'>4</a>
+<a name='L5'></a><a href='#L5'>5</a>
+<a name='L6'></a><a href='#L6'>6</a>
+<a name='L7'></a><a href='#L7'>7</a>
+<a name='L8'></a><a href='#L8'>8</a>
+<a name='L9'></a><a href='#L9'>9</a>
+<a name='L10'></a><a href='#L10'>10</a>
+<a name='L11'></a><a href='#L11'>11</a>
+<a name='L12'></a><a href='#L12'>12</a>
+<a name='L13'></a><a href='#L13'>13</a>
+<a name='L14'></a><a href='#L14'>14</a>
+<a name='L15'></a><a href='#L15'>15</a>
+<a name='L16'></a><a href='#L16'>16</a>
+<a name='L17'></a><a href='#L17'>17</a>
+<a name='L18'></a><a href='#L18'>18</a>
+<a name='L19'></a><a href='#L19'>19</a>
+<a name='L20'></a><a href='#L20'>20</a>
+<a name='L21'></a><a href='#L21'>21</a>
+<a name='L22'></a><a href='#L22'>22</a>
+<a name='L23'></a><a href='#L23'>23</a>
+<a name='L24'></a><a href='#L24'>24</a>
+<a name='L25'></a><a href='#L25'>25</a>
+<a name='L26'></a><a href='#L26'>26</a>
+<a name='L27'></a><a href='#L27'>27</a>
+<a name='L28'></a><a href='#L28'>28</a>
+<a name='L29'></a><a href='#L29'>29</a>
+<a name='L30'></a><a href='#L30'>30</a>
+<a name='L31'></a><a href='#L31'>31</a>
+<a name='L32'></a><a href='#L32'>32</a>
+<a name='L33'></a><a href='#L33'>33</a>
+<a name='L34'></a><a href='#L34'>34</a>
+<a name='L35'></a><a href='#L35'>35</a>
+<a name='L36'></a><a href='#L36'>36</a>
+<a name='L37'></a><a href='#L37'>37</a>
+<a name='L38'></a><a href='#L38'>38</a>
+<a name='L39'></a><a href='#L39'>39</a></td><td class="line-coverage quiet"><span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-yes">1x</span>
+<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/** Latitude of the Ka'bah center, Masjid al-Haram, Mecca (degrees north). */
+export const KAABA_LAT = 21.422511;
+&nbsp;
+/** Longitude of the Ka'bah center, Masjid al-Haram, Mecca (degrees east). */
+export const KAABA_LNG = 39.82615;
+&nbsp;
+/** Mean radius of the Earth in kilometers (WGS-84 volumetric mean). */
+export const EARTH_RADIUS_KM = 6371;
+&nbsp;
+/** Eight-point compass abbreviations. */
+export const COMPASS_ABBR = [
+  "N",
+  "NE",
+  "E",
+  "SE",
+  "S",
+  "SW",
+  "W",
+  "NW",
+] as const;
+&nbsp;
+/** Eight-point compass full names. */
+export const COMPASS_NAMES = [
+  "North",
+  "Northeast",
+  "East",
+  "Southeast",
+  "South",
+  "Southwest",
+  "West",
+  "Northwest",
+] as const;
+&nbsp;
+/** Compass abbreviation type. */
+export type CompassAbbr = (typeof COMPASS_ABBR)[number];
+&nbsp;
+/** Compass full name type. */
+export type CompassName = (typeof COMPASS_NAMES)[number];
+&nbsp;</pre></td></tr></table></pre>
+
+                <div class='push'></div><!-- for sticky footer -->
+            </div><!-- /wrapper -->
+            <div class='footer quiet pad2 space-top1 center small'>
+                Code coverage generated by
+                <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
+                at 2026-05-30T19:40:15.551Z
+            </div>
+        <script src="prettify.js"></script>
+        <script>
+            window.onload = function () {
+                prettyPrint();
+            };
+        </script>
+        <script src="sorter.js"></script>
+        <script src="block-navigation.js"></script>
+    </body>
+</html>
+    
--- a/coverage/lcov.info
+++ b/coverage/lcov.info
@ -0,0 +1,241 @@
+TN:
+SF:src/index.ts
+FN:38,qiblaAngle
+FN:62,compassDir
+FN:74,compassName
+FN:92,qiblaGreatCircle
+FN:144,distanceKm
+FNF:5
+FNH:5
+FNDA:15,qiblaAngle
+FNDA:10,compassDir
+FNDA:9,compassName
+FNDA:9,qiblaGreatCircle
+FNDA:8,distanceKm
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+DA:122,556
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+DA:124,556
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+DA:127,556
+DA:128,556
+DA:129,556
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+DA:132,6
+DA:133,6
+DA:134,1
+DA:135,1
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+DA:149,8
+DA:150,8
+DA:151,8
+DA:152,8
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+DA:155,8
+DA:156,8
+LF:156
+LH:156
+BRDA:38,0,0,15
+BRDA:39,1,0,14
+BRDA:39,2,0,2
+BRDA:41,3,0,13
+BRDA:42,4,0,12
+BRDA:42,5,0,2
+BRDA:44,6,0,11
+BRDA:62,7,0,10
+BRDA:74,8,0,9
+BRDA:92,9,0,9
+BRDA:97,10,0,1
+BRDA:99,11,0,8
+BRDA:100,12,0,1
+BRDA:102,13,0,7
+BRDA:117,14,0,1
+BRDA:117,15,0,6
+BRDA:120,16,0,556
+BRDA:131,17,0,6
+BRDA:144,18,0,8
+BRF:19
+BRH:19
+end_of_record
+TN:
+SF:src/types.ts
+FNF:0
+FNH:0
+DA:1,1
+DA:2,1
+DA:3,1
+DA:4,1
+DA:5,1
+DA:6,1
+DA:7,1
+DA:8,1
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+DA:31,1
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+LF:38
+LH:38
+BRF:0
+BRH:0
+end_of_record
--- a/coverage/tmp/coverage-46671-1780170015530-0.json
+++ b/coverage/tmp/coverage-46671-1780170015530-0.json
--- a/coverage/tmp/coverage-46672-1780170015536-0.json
+++ b/coverage/tmp/coverage-46672-1780170015536-0.json
--- a/src/index.ts
+++ b/src/index.ts
@ -7,6 +7,8 @@
 *
 * Ka'bah coordinates sourced from verified GPS data.
 *
+ * SPORT: packages.md — @acamarata/qibla row
+ *
 * @module
 */

@ -34,6 +36,12 @@ const DEG = Math.PI / 180;
 * @param lng - Observer longitude in decimal degrees (-180 to 180).
 * @returns Bearing in degrees clockwise from north (0 = N, 90 = E, 180 = S, 270 = W).
 * @throws {RangeError} If latitude is outside [-90, 90] or longitude outside [-180, 180].
+ *
+ * @example
+ * qiblaAngle(40.7128, -74.006);  // ~58.49 (New York)
+ * qiblaAngle(51.5074, -0.1278);  // ~119.0 (London)
+ *
+ * @see {@link https://github.com/acamarata/qibla/wiki/api/qiblaAngle} Wiki API page
 */
 export function qiblaAngle(lat: number, lng: number): number {
  if (lat < -90 || lat > 90) {
@ -47,9 +55,7 @@ export function qiblaAngle(lat: number, lng: number): number {
  const φ2 = KAABA_LAT * DEG,
    λ2 = KAABA_LNG * DEG;
  const y = Math.sin(λ2 - λ1) * Math.cos(φ2);
-  const x =
-    Math.cos(φ1) * Math.sin(φ2) -
-    Math.sin(φ1) * Math.cos(φ2) * Math.cos(λ2 - λ1);
+  const x = Math.cos(φ1) * Math.sin(φ2) - Math.sin(φ1) * Math.cos(φ2) * Math.cos(λ2 - λ1);
  return (Math.atan2(y, x) / DEG + 360) % 360;
 }

@ -89,11 +95,7 @@ export function compassName(bearing: number): CompassName {
 * @returns Array of [latitude, longitude] pairs in degrees.
 * @throws {RangeError} If latitude is outside [-90, 90] or longitude outside [-180, 180].
 */
-export function qiblaGreatCircle(
-  lat: number,
-  lng: number,
-  steps = 120,
-): [number, number][] {
+export function qiblaGreatCircle(lat: number, lng: number, steps = 120): [number, number][] {
  if (lat < -90 || lat > 90) {
    throw new RangeError(`Latitude must be between -90 and 90, got ${lat}`);
  }
@ -109,8 +111,7 @@ export function qiblaGreatCircle(
    2 *
    Math.asin(
      Math.sqrt(
-        Math.sin((φ2 - φ1) / 2) ** 2 +
-          Math.cos(φ1) * Math.cos(φ2) * Math.sin((λ2 - λ1) / 2) ** 2,
+        Math.sin((φ2 - φ1) / 2) ** 2 + Math.cos(φ1) * Math.cos(φ2) * Math.sin((λ2 - λ1) / 2) ** 2,
      ),
    );

@ -124,10 +125,7 @@ export function qiblaGreatCircle(
    const x = A * Math.cos(φ1) * Math.cos(λ1) + B * Math.cos(φ2) * Math.cos(λ2);
    const y = A * Math.cos(φ1) * Math.sin(λ1) + B * Math.cos(φ2) * Math.sin(λ2);
    const z = A * Math.sin(φ1) + B * Math.sin(φ2);
-    points.push([
-      Math.atan2(z, Math.sqrt(x * x + y * y)) / DEG,
-      Math.atan2(y, x) / DEG,
-    ]);
+    points.push([Math.atan2(z, Math.sqrt(x * x + y * y)) / DEG, Math.atan2(y, x) / DEG]);
  }
  return points;
 }
@ -141,16 +139,10 @@ export function qiblaGreatCircle(
 * @param lng2 - Second point longitude in decimal degrees.
 * @returns Distance in kilometers (spherical Earth approximation).
 */
-export function distanceKm(
-  lat1: number,
-  lng1: number,
-  lat2: number,
-  lng2: number,
-): number {
+export function distanceKm(lat1: number, lng1: number, lat2: number, lng2: number): number {
  const dLat = (lat2 - lat1) * DEG;
  const dLng = (lng2 - lng1) * DEG;
  const a =
-    Math.sin(dLat / 2) ** 2 +
-    Math.cos(lat1 * DEG) * Math.cos(lat2 * DEG) * Math.sin(dLng / 2) ** 2;
+    Math.sin(dLat / 2) ** 2 + Math.cos(lat1 * DEG) * Math.cos(lat2 * DEG) * Math.sin(dLng / 2) ** 2;
  return EARTH_RADIUS_KM * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
 }
--- a/src/types.ts
+++ b/src/types.ts
@ -8,16 +8,7 @@ export const KAABA_LNG = 39.82615;
 export const EARTH_RADIUS_KM = 6371;

 /** Eight-point compass abbreviations. */
-export const COMPASS_ABBR = [
-  "N",
-  "NE",
-  "E",
-  "SE",
-  "S",
-  "SW",
-  "W",
-  "NW",
-] as const;
+export const COMPASS_ABBR = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"] as const;

 /** Eight-point compass full names. */
 export const COMPASS_NAMES = [
				`@ -0,0 +1 @@`
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