Adding relative indexing method (mdn#1525)

* Adding relative indexing method Adding at() method * Making suggested amends * Update index.html Co-authored-by: Chris Mills <[email protected]>
arturcarvalho · Jan 22, 2021 · 7489738 · 7489738
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commit 7489738
Showing 1 changed file with 36 additions and 0 deletions.
diff --git a/files/en-us/mozilla/firefox/experimental_features/index.html b/files/en-us/mozilla/firefox/experimental_features/index.html
@@ -513,6 +513,42 @@ <h3 id="Property_math-style">Property: math-style </h3>
 
 <h2 id="JavaScript">JavaScript</h2>
 
+<h3 id="Relative_indexing_method">Relative indexing method</h3>
+
+<p>The relative indexing method <code>at()</code> has been added to the <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array">Array</a></code>, <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">String</a></code> and <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray">TypedArray</a></code> global objects. Passing a positive integer to the method returns the item or character at that position, and it also accepts negative integers, which count back from the end of the array or string. For example, `1` would return the second item or character and `-1` would return the last item or character. See <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at">Array.prototype.at()</a></code>, <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/at">String.prototype.at()</a></code> and <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/at">TypedArray.prototype.at()</a></code> for more details.</p>
+
+<table class="standard-table" style="max-width: 42rem;">
+ <thead>
+  <tr>
+   <th scope="col" style="vertical-align: bottom;">Release channel</th>
+   <th scope="col" style="vertical-align: bottom;">Version added</th>
+   <th scope="col" style="vertical-align: bottom;">Enabled by default?</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <th scope="row">Nightly</th>
+   <td>85</td>
+   <td>Yes</td>
+  </tr>
+  <tr>
+   <th scope="row">Developer Edition</th>
+   <td>85</td>
+   <td>No</td>
+  </tr>
+  <tr>
+   <th scope="row">Beta</th>
+   <td>85</td>
+   <td>No</td>
+  </tr>
+  <tr>
+   <th scope="row">Release</th>
+   <td>85</td>
+   <td>No</td>
+  </tr>
+ </tbody>
+</table>
+
 <h3 id="Private_class_fields">Private class fields</h3>
 
 <p>See <a href="/en-US/docs/Web/JavaScript/Reference/Classes/Private_class_fields">Private class fields</a> for more details.</p>