Prepare Web API section for Markdown conversion (#2464)

* Remove summary classes and ids

* Remove unecessary hidden

* Remove useless span filled with useless attributes / ids

* Remove useless font

* Remove notranslate

* Remove id in other elements than headings

* Remove name attributes

* Remove <pre><code> for JS w/ language-js class

* Remove <pre><code> for HTML w/ language-html class

* Remove <pre><code> for other lang w/ language-* class

* Rm highlighted line in code samples

* fix links, internal, external, absolute URLs

* missing file from last commit

* Fix styles errors apart from table + some classes

* Fix notes and warnings (+ some other :x)

* fix typo during merge which broke a doc

* aand forgot a conflict

* fix remaining classes of errors except dls and images

* Fix dls

* Fix images (deki/mozillademos) and remaining style issues

* Remove script tag from svg file

* Remove script tag from svg fileS

* Compress SVG files for CI

1 files changed, 4 insertions, 4 deletions

diff --git a/files/fr/web/api/element/getattributenames/index.html b/files/fr/web/api/element/getattributenames/index.html
index 0fac66f4b1..d99f4465fe 100644
--- a/files/fr/web/api/element/getattributenames/index.html
+++ b/files/fr/web/api/element/getattributenames/index.html
@@ -15,12 +15,12 @@ translation_of: Web/API/Element/getAttributeNames
 
 <p>L'utilisation de <code>getAttributeNames()</code> complété par {{domxref("Element.getAttribute","getAttribute()")}}, est une alternative efficiente et performante pour l'accès à {{domxref("Element.attributes")}}.</p>
 
-<h2 id="Syntax" name="Syntax">Syntaxe</h2>
+<h2 id="Syntax">Syntaxe</h2>
 
 <pre class="syntaxbox"><em>let attributeNames</em> = element.getAttributeNames();
 </pre>
 
-<h2 id="Example" name="Example">Exemple</h2>
+<h2 id="Example">Exemple</h2>
 
 <pre class="brush:js">// Itérer sur les attributs de l'élément
 for(let name of element.getAttributeNames())
@@ -32,7 +32,7 @@ for(let name of element.getAttributeNames())
 
 <h2 id="Polyfill">Polyfill</h2>
 
-<pre class="line-numbers  language-html"><code class="language-html">if (Element.prototype.getAttributeNames == undefined) {
+<pre class="brush: html">if (Element.prototype.getAttributeNames == undefined) {
   Element.prototype.getAttributeNames = function () {
     var attributes = this.attributes;
     var length = attributes.length;
@@ -42,7 +42,7 @@ for(let name of element.getAttributeNames())
     }
     return result;
   };
-}</code></pre>
+}</pre>
 
 <h2 id="Spécifications">Spécifications</h2>