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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>UTF-8 Normalization Playground</title>
<script src="iconv-lite.js"></script>
<style>
body {
font-family: Ubuntu, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
}
label {
display: inline-block;
width: 5rem;
margin-bottom: 10px;
}
input {
width: 42rem;
padding: 5px;
margin-bottom: 10px;
font-size: 2rem;
border: 1px solid lightgray
}
input:focus {
box-shadow: 0 0 14px 0px rgba(0, 0, 0, 0.1);
outline: none;
}
</style>
</head>
<body>
<h1>UTF-8 Normalization Playground</h1>
<div>
<label for="string">String:</label>
<input type="text" id="string" placeholder="Enter text here" value="bẩfi">
</div>
<div>
<label for="utf8">Current:</label>
<input type="text" id="utf8" placeholder="UTF-8 bytes">
</div>
<div>
<label for="nfc">NFC:</label>
<input type="text" id="nfc" placeholder="UTF-8 bytes">
</div>
<div>
<label for="nfd">NFD:</label>
<input type="text" id="nfd" placeholder="UTF-8 bytes">
</div>
<div>
<label for="nfkc">NFKC:</label>
<input type="text" id="nfkc" placeholder="UTF-8 bytes">
</div>
<div>
<label for="nfkd">NFKD:</label>
<input type="text" id="nfkd" placeholder="UTF-8 bytes">
</div>
<div>
<label for="encoding">Encoding:</label>
<select id="encoding">
<!-- The list of all possible argumets of iconv -->
<option value="ascii">ascii</option>
<option value="base64">base64</option>
<option value="big5">big5</option>
<option value="big5-hkscs">big5-hkscs</option>
<option value="binary">binary</option>
<option value="cesu8">cesu8</option>
<option value="euc-cn">euc-cn</option>
<option value="euc-jp">euc-jp</option>
<option value="euc-kr">euc-kr</option>
<option value="euc-kr">euc-kr</option>
<option value="gb18030">gb18030</option>
<option value="gb2312">gb2312</option>
<option value="gbk">gbk</option>
<option value="ibm1046">ibm1046</option>
<option value="ibm1124">ibm1124</option>
<option value="ibm1125">ibm1125</option>
<option value="ibm1129">ibm1129</option>
<option value="ibm1133">ibm1133</option>
<option value="ibm1161">ibm1161</option>
<option value="ibm1162">ibm1162</option>
<option value="ibm1163">ibm1163</option>
<option value="ibm437">ibm437</option>
<option value="ibm737">ibm737</option>
<option value="ibm775">ibm775</option>
<option value="ibm808">ibm808</option>
<option value="ibm850">ibm850</option>
<option value="ibm852">ibm852</option>
<option value="ibm855">ibm855</option>
<option value="ibm856">ibm856</option>
<option value="ibm857">ibm857</option>
<option value="ibm860">ibm860</option>
<option value="ibm861">ibm861</option>
<option value="ibm862">ibm862</option>
<option value="ibm863">ibm863</option>
<option value="ibm864">ibm864</option>
<option value="ibm865">ibm865</option>
<option value="ibm866">ibm866</option>
<option value="ibm869">ibm869</option>
<option value="ibm922">ibm922</option>
<option value="iso-8859-1">iso-8859-1</option>
<option value="iso-8859-10">iso-8859-10</option>
<option value="iso-8859-13">iso-8859-13</option>
<option value="iso-8859-14">iso-8859-14</option>
<option value="iso-8859-15">iso-8859-15</option>
<option value="iso-8859-16">iso-8859-16</option>
<option value="iso-8859-2">iso-8859-2</option>
<option value="iso-8859-3">iso-8859-3</option>
<option value="iso-8859-4">iso-8859-4</option>
<option value="iso-8859-5">iso-8859-5</option>
<option value="iso-8859-6">iso-8859-6</option>
<option value="iso-8859-7">iso-8859-7</option>
<option value="iso-8859-8">iso-8859-8</option>
<option value="koi8-r">koi8-r</option>
<option value="koi8-ru">koi8-ru</option>
<option value="koi8-t">koi8-t</option>
<option value="koi8-u">koi8-u</option>
<option value="ks_c_5601">ks_c_5601</option>
<option value="maccenteuro">maccenteuro</option>
<option value="maccroatian">maccroatian</option>
<option value="maccyrillic">maccyrillic</option>
<option value="macgreek">macgreek</option>
<option value="maciceland">maciceland</option>
<option value="macintosh">macintosh</option>
<option value="macroman">macroman</option>
<option value="macroman">macroman</option>
<option value="macromania">macromania</option>
<option value="macthai">macthai</option>
<option value="macturkish">macturkish</option>
<option value="macukraine">macukraine</option>
<option value="shift-jis">shift-jis</option>
<option value="ucs-4">ucs-4</option>
<option value="ucs2">ucs2</option>
<option value="utf-16be">utf-16be</option>
<option value="utf-16le" selected>utf-16le</option>
<option value="utf-16">utf-16le+BOM</option>
<option value="utf-32be">utf-32be</option>
<option value="utf-32le">utf-32le</option>
<option value="utf-32">utf-32le+BOM</option>
<option value="utf7">utf7</option>
<option value="utf7-imap">utf7-imap</option>
<option value="windows-1250">windows-1250</option>
<option value="windows-1251">windows-1251</option>
<option value="windows-1252">windows-1252</option>
<option value="windows-1253">windows-1253</option>
<option value="windows-1254">windows-1254</option>
<option value="windows-1255">windows-1255</option>
<option value="windows-1256">windows-1256</option>
<option value="windows-1257">windows-1257</option>
<option value="windows-1258">windows-1258</option>
<option value="windows-31j">windows-31j</option>
<option value="windows-874">windows-874</option>
<option value="windows932">windows932</option>
<option value="windows936">windows936</option>
<option value="windows949">windows949</option>
<option value="windows950">windows950</option>
</select>
</div>
<div>
<label for="encoded-hex">Encoded Hex:</label>
<input type="text" id="encoded-hex" placeholder="Hex representation">
</div>
<script>
// Convert a string to UTF-8 hex
function stringToUtf8Hex(str) {
return Array.from(new TextEncoder().encode(str))
.map(byte => byte.toString(16).padStart(2, '0').toUpperCase())
.join(' ');
}
// Convert UTF-8 hex to a string
function utf8HexToString(hex) {
const bytes = hex.trim().split(/\s+/).map(byte => parseInt(byte, 16));
return new TextDecoder().decode(new Uint8Array(bytes));
}
// Convert string to hex in the selected encoding
function stringToHexInEncoding(str, encoding) {
return Array.from(iconv.encode(str, encoding)).map(byte => byte.toString(16).padStart(2, '0').toUpperCase())
.join(' ');
}
// Convert hex to string in the selected encoding
function hexToStringInEncoding(hex, encoding) {
const bytes = hex.trim().split(/\s+/).map(byte => parseInt(byte, 16));
return iconv.decode(new Uint8Array(bytes), encoding);
}
// Update the fields on input change
function updateFields(source) {
const fields = ['string', 'utf8', 'nfd', 'nfc', 'nfkd', 'nfkc', 'encoded-hex'];
// Get the encoding value
const encoding = document.getElementById('encoding').value;
// Get the value of the source field
const sourceValue = document.getElementById(source).value;
let sourceText;
switch (source) {
case 'string':
sourceText = sourceValue;
break;
case 'utf8':
case 'nfd':
case 'nfc':
case 'nfkd':
case 'nfkc':
sourceText = utf8HexToString(sourceValue);
break;
case 'encoded-hex':
sourceText = hexToStringInEncoding(sourceValue, encoding);
break;
}
// Set the value to the other fields
fields.forEach(field => {
if (field !== source) {
let toDisplay;
switch (field) {
case 'nfd':
toDisplay = stringToUtf8Hex(sourceText.normalize('NFD'));
break;
case 'nfc':
toDisplay = stringToUtf8Hex(sourceText.normalize('NFC'));
break;
case 'nfkd':
toDisplay = stringToUtf8Hex(sourceText.normalize('NFKD'));
break;
case 'nfkc':
toDisplay = stringToUtf8Hex(sourceText.normalize('NFKC'));
break;
case 'utf8':
toDisplay = stringToUtf8Hex(sourceText);
break;
case 'encoded-hex':
toDisplay = stringToHexInEncoding(sourceText.normalize('NFC'), encoding);
break;
default:
toDisplay = sourceText;
}
document.getElementById(field).value = toDisplay;
}
});
}
// Add event listener to all input fields
document.querySelectorAll('input').forEach(input => {
input.addEventListener('input', function () {
updateFields(this.id);
});
});
// Add event listener when the encoding is changed
document.getElementById('encoding').addEventListener('change', function () {
updateFields('string');
});
// Initialize the fields
updateFields('string');
</script>
<!-- The GitHub corner -->
<a href="https://github.com/kpym/utf8playground" class="github-corner" aria-label="View source on GitHub"><svg
width="80" height="80" viewBox="0 0 250 250"
style="fill:#AAAADD; 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>
<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>
</svg></a>
</body>
</html>