{{APIRef("DOM")}}
ByteString is a UTF-8 String that corresponds to the set of all possible sequences of bytes. ByteString maps to a {{jsxref("String")}} when returned in JavaScript; generally, it's only used when interfacing with protocols that use bytes and strings interchangably, such as HTTP.
| Specification | Status | Comment |
|---|---|---|
| {{SpecName('WebIDL', '#idl-ByteString', 'ByteString')}} | {{Spec2('WebIDL')}} | Initial definition. |
<p>{{APIRef("DOM")}}</p>
<p><strong><code>ByteString</code></strong> is a UTF-8 String that corresponds to the set of all possible sequences of bytes. <strong><code>ByteString</code></strong> maps to a {{jsxref("String")}} when returned in JavaScript; generally, it's only used when interfacing with protocols that use bytes and strings interchangably, such as HTTP.</p>
<h2 id="Specification" name="Specification">Specifications</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('WebIDL', '#idl-ByteString', 'ByteString')}}</td>
<td>{{Spec2('WebIDL')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String" title="/en-US/docs/Web/API/DOMString">String</a></li>
<li><a href="/en-US/docs/Web/JavaScript/Typed_arrays/String_view" title="/en-US/docs/Web/JavaScript/Typed_arrays/String_view"><code>StringView</code> – a C-like representation of strings based on typed arrays</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/DOMString/Binary">Binary strings</a></li>
</ul>