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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Render LaTex with Hershey Fonts">
<title>hfmath</title>
<style>
body {
max-width: 800px;
margin: auto;
font-family: monospace;
}
h1 {
font-family: sans-serif;
font-weight: 100;
}
textarea {
resize: none;
border: 1px solid black;
}
</style>
</head>
<body>
<h1>
hfmath
</h1>
<p> <a href="https://github.com/LingDong-/hfmath">hfmath</a> is a tiny JS library that renders LaTeX math with single-line <a href="https://en.wikipedia.org/wiki/Hershey_fonts">Hershey Fonts</a>. </p>
<p>
This demo below is running client-side in you browser,
but you can also conveniently use `<a href="https://hfmath.glitch.me/x^2+2x+1">https://hfmath.glitch.me/x^2+2x+1</a>`
to obtain an SVG rendered on <a href="https://glitch.com/">Glitch</a> server,
for embedding on your websites (<img src="...).
<a href="https://www.december.com/html/spec/esccodes.html">URL escape codes</a> are sometimes necessary, e.g. the backslash is "%5C". </p>
<p> Type LaTeX below: </p>
<textarea id="ta" style="width:100%;height:150px;font-family:monospace" onkeyup="update()" onchange="update()">
\begin{aligned}
\nabla \times \vec{\mathbf{B}} - \frac 1 c \, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}} + \frac 1 c \, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{aligned}
</textarea>
<div id="out" style="width:100%;"> </div>
<p> Grab output format of your choice: </p>
<table style="width:100%;">
<tr>
<td>SVG</td>
<td><path d="...</td>
<td>Polylines</td>
</tr>
<tr>
<td>
<textarea id="o1" style="width:100%;height:150px;font-family:monospace"> </textarea>
</td>
<td>
<textarea id="o2" style="width:100%;height:150px;font-family:monospace"> </textarea>
</td>
<td>
<textarea id="o3" style="width:100%;height:150px;font-family:monospace"> </textarea>
</td>
</tr>
</table>
<p> hfmath supports more features and options not present in this simple demo. Check out the <a href="https://github.com/LingDong-/hfmath">source hosted on GitHub</a>! </p>
<script src="./dist/hfmath.global.js"></script>
<script>
function update() {
var t = document.getElementById('ta').value;
let eq = new HFMATH.hfmath(t);
let s = eq.svg();
console.log(t, s);
var out = document.getElementById('out');
out.innerHTML = s;
document.getElementById('o1').innerHTML = s;
document.getElementById('o2').innerHTML = eq.pathd()
document.getElementById('o3').innerHTML = JSON.stringify(eq.polylines());
}
update();
</script>
<a href="https://github.com/LingDong-/hfmath" class="github-corner" aria-label="View source on GitHub"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
</body>
</html>