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---
title: String.prototype.toLowerCase()
slug: Web/JavaScript/Reference/Global_Objects/String/toLowerCase
tags:
- JavaScript
- Method
- Prototype
- Reference
- String
translation_of: Web/JavaScript/Reference/Global_Objects/String/toLowerCase
---
<div>{{JSRef}}</div>
<p>Method <strong><code>toLowerCase()</code></strong> mengembalikan nilai string yang dipanggil yang telah dikonversi ke lowercase (huruf kecil).</p>
<h2 id="Sintaks">Sintaks</h2>
<pre class="syntaxbox"><code><var>str</var>.toLowerCase()</code></pre>
<h2 id="Deskripsi">Deskripsi</h2>
<p>Method <code>toLowerCase()</code> mengembaikan nilai dari string yang telah dikonversi ke lowercase. <code>toLowerCase()</code> tidak berdampak pada nilai string pada variabel <code>str</code> itu sendiri.</p>
<h2 id="Contoh">Contoh</h2>
<h3 id="Penggunaan_toLowerCase()">Penggunaan <code>toLowerCase()</code></h3>
<pre class="brush: js">console.log('ALPHABET'.toLowerCase()); // 'alphabet'
</pre>
<h2 id="Spesifikasi">Spesifikasi</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Spesifikasi</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ES1')}}</td>
<td>{{Spec2('ES1')}}</td>
<td>Initial definition. Implemented in JavaScript 1.0.</td>
</tr>
<tr>
<td>{{SpecName('ES5.1', '#sec-15.5.4.16', 'String.prototype.toLowerCase')}}</td>
<td>{{Spec2('ES5.1')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-string.prototype.tolowercase', 'String.prototype.toLowerCase')}}</td>
<td>{{Spec2('ES6')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-string.prototype.tolowercase', 'String.prototype.toLowerCase')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Kompabilitas_browser">Kompabilitas browser</h2>
<div>{{CompatibilityTable}}</div>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Fitur</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Dukungan dasar</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Fitur</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Dukungan dasar</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="Lihat_juga">Lihat juga</h2>
<ul>
<li>{{jsxref("String.prototype.toLocaleLowerCase()")}}</li>
<li>{{jsxref("String.prototype.toLocaleUpperCase()")}}</li>
<li>{{jsxref("String.prototype.toUpperCase()")}}</li>
</ul>
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