use class="hidden" not style="display:none"

3 files changed, 4 insertions, 5 deletions

diff --git a/files/zh-cn/web/html/element/iframe/index.html b/files/zh-cn/web/html/element/iframe/index.html
index c25323e8f6..f67d286d24 100644
--- a/files/zh-cn/web/html/element/iframe/index.html
+++ b/files/zh-cn/web/html/element/iframe/index.html
@@ -134,10 +134,10 @@ translation_of: Web/HTML/Element/iframe
  </dd>
 </dl>
 
-<h3 id="非标准属性_non-standard_inline">非标准属性 {{non-standard_inline}}<span style="display: none;"> </span><span style="display: none;"> </span></h3>
+<h3 id="非标准属性_non-standard_inline">非标准属性 {{non-standard_inline}}<span class="hidden"> </span><span class="hidden"> </span></h3>
 
 <dl>
- <dt><strong>{{htmlattrdef("mozbrowser")}} {{non-standard_inline}} </strong><span style="display: none;"> </span><span style="display: none;"> </span></dt>
+ <dt><strong>{{htmlattrdef("mozbrowser")}} {{non-standard_inline}} </strong><span class="hidden"> </span><span class="hidden"> </span></dt>
 </dl>
 
 <div class="blockIndicator note">
diff --git a/files/zh-cn/web/html/element/input/number/index.html b/files/zh-cn/web/html/element/input/number/index.html
index ef7aec6323..4baa8ba6ee 100644
--- a/files/zh-cn/web/html/element/input/number/index.html
+++ b/files/zh-cn/web/html/element/input/number/index.html
@@ -233,7 +233,6 @@ input:valid+span:after {
         &lt;input id="meters" type="number" name="meters" step="0.01" min="0" placeholder="e.g. 1.78" required&gt;
         &lt;span class="validity"&gt;&lt;/span&gt;
     &lt;/div&gt;
-    &lt;div class="feetInputGroup" style="display: none;"&gt;
         &lt;span&gt;Enter your height — &lt;/span&gt;
         &lt;label for="feet"&gt;feet:&lt;/label&gt;
         &lt;input id="feet" type="number" name="feet" min="0" step="1"&gt;
@@ -252,7 +251,7 @@ input:valid+span:after {
 
 <p>You'll see that we are using many of the attributes we've already looked at in the article earlier on. Since we want to accept a meter value in centimeters, we've set the <code>step</code> value to <code>0.01</code>, so that values like 1.78 are not seen as invalid. We've also provided a placeholder for that input.</p>
 
-<p>We've hidden the feet and inches inputs initially using <code>style="display: none;"</code> so that meters is the default entry type.</p>
+<p>We've hidden the feet and inches inputs initially using <code>class="hidden"</code> so that meters is the default entry type.</p>
 
 <p>Now on to the CSS — this looks very similar to the validation styling we saw before; nothing remarkable here:</p>
 
diff --git a/files/zh-cn/web/html/global_attributes/index.html b/files/zh-cn/web/html/global_attributes/index.html
index 86a17db9f7..3654265669 100644
--- a/files/zh-cn/web/html/global_attributes/index.html
+++ b/files/zh-cn/web/html/global_attributes/index.html
@@ -22,7 +22,7 @@ translation_of: Web/HTML/Global_attributes
  <li><a href="https://developer.mozilla.org/zh-CN/docs/Web/Guide/Events/Event_handlers">事件处理程序</a> 属性：<strong><code>onabort</code></strong>, <code><strong>onautocomplete</strong></code>, <code><strong>onautocompleteerror</strong></code>, <code><strong>onblur</strong></code>, <code><strong>oncancel</strong></code>, <code><strong>oncanplay</strong></code>, <code><strong>oncanplaythrough</strong></code>, <code><strong>onchange</strong></code>, <code><strong>onclick</strong></code>, <code><strong>onclose</strong></code>, <code><strong>oncontextmenu</strong></code>, <code><strong>oncuechange</strong></code>, <code><strong>ondblclick</strong></code>, <code><strong>ondrag</strong></code>, <code><strong>ondragend</strong></code>, <code><strong>ondragenter</strong></code>, <code><strong>ondragexit</strong></code>, <code><strong>ondragleave</strong></code>, <code><strong>ondragover</strong></code>, <code><strong>ondragstart</strong></code>, <code><strong>ondrop</strong></code>, <code><strong>ondurationchange</strong></code>, <code><strong>onemptied</strong></code>, <code><strong>onended</strong></code>, <code><strong>onerror</strong></code>, <code><strong>onfocus</strong></code>, <code><strong>oninput</strong></code>, <code><strong>oninvalid</strong></code>, <code><strong>onkeydown</strong></code>, <code><strong>onkeypress</strong></code>, <code><strong>onkeyup</strong></code>, <code><strong>onload</strong></code>, <code><strong>onloadeddata</strong></code>, <code><strong>onloadedmetadata</strong></code>, <code><strong>onloadstart</strong></code>, <code><strong>onmousedown</strong></code>, <code><strong>onmouseenter</strong></code>, <code><strong>onmouseleave</strong></code>, <code><strong>onmousemove</strong></code>, <code><strong>onmouseout</strong></code>, <code><strong>onmouseover</strong></code>, <code><strong>onmouseup</strong></code>, <code><strong>onmousewheel</strong></code>, <code><strong>onpause</strong></code>, <code><strong>onplay</strong></code>, <code><strong>onplaying</strong></code>, <code><strong>onprogress</strong></code>, <code><strong>onratechange</strong></code>, <code><strong>onreset</strong></code>, <code><strong>onresize</strong></code>, <code><strong>onscroll</strong></code>, <code><strong>onseeked</strong></code>, <code><strong>onseeking</strong></code>, <code><strong>onselect</strong></code>, <code><strong>onshow</strong></code>, <code><strong>onsort</strong></code>, <code><strong>onstalled</strong></code>, <code><strong>onsubmit</strong></code>, <code><strong>onsuspend</strong></code>, <code><strong>ontimeupdate</strong></code>, <code><strong>ontoggle</strong></code>, <code><strong>onvolumechange</strong></code>, <code><strong>onwaiting</strong></code>.</li>
 </ul>
 
-<h2 id="全局属性列表">全局属性列表<span style="display: none;"> </span><span style="display: none;"> </span></h2>
+<h2 id="全局属性列表">全局属性列表<span class="hidden"> </span><span class="hidden"> </span></h2>
 
 <ul>
 </ul>