Use Prism.languages.markup as grammar examples Prism.languages.html doesn't exist. The grammar for HTML is Prism.languages.markup.
diff --git a/extending.html b/extending.html
index 6bbb063..e3706cd 100644
--- a/extending.html
+++ b/extending.html
@@ -151,7 +151,7 @@
<dt>text</dt>
<dd>A string with the code to be highlighted.</dd>
<dt>grammar</dt>
- <dd>An object containing the tokens to use. Usually a language definition like <code>Prism.languages.html</code></dd>
+ <dd>An object containing the tokens to use. Usually a language definition like <code>Prism.languages.markup</code></dd>
</dl>
<h2>Returns</h2>
@@ -168,7 +168,7 @@
<dt>text</dt>
<dd>A string with the code to be highlighted.</dd>
<dt>grammar</dt>
- <dd>An object containing the tokens to use. Usually a language definition like <code>Prism.languages.html</code></dd>
+ <dd>An object containing the tokens to use. Usually a language definition like <code>Prism.languages.markup</code></dd>
</dl>
<h2>Returns</h2>