Update toast documentation following pull #27155

Also remove close button everywhere just let it when autohide is set to false

Author: Lausselloic

js/tests/visual/toast.html

@@ -31,9 +31,6 @@ <h1>Toast <small>Bootstrap Visual Test</small></h1>
           <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
           <strong class="mr-auto">Bootstrap</strong>
           <small>11 mins ago</small>
-          <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-            <span aria-hidden="true">&times;</span>
-          </button>
         </div>
         <div class="toast-body">
           Hello, world! This is a toast message with <strong>autohide</strong> in 2 seconds

site/docs/4.1/components/toasts.md

@@ -71,9 +71,6 @@ Plus, they'll easily stack.
     <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
     <strong class="mr-auto">Bootstrap</strong>
     <small class="text-muted">just now</small>
-    <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-      <span aria-hidden="true">&times;</span>
-    </button>
   </div>
   <div class="toast-body">
     See? Just like this.
@@ -85,9 +82,6 @@ Plus, they'll easily stack.
     <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
     <strong class="mr-auto">Bootstrap</strong>
     <small class="text-muted">2 seconds ago</small>
-    <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-      <span aria-hidden="true">&times;</span>
-    </button>
   </div>
   <div class="toast-body">
     Heads up, toasts will stack automatically
@@ -99,16 +93,39 @@ Plus, they'll easily stack.
 
 ## Accessibility
 
-Toasts are intended to be small interruptions to your visitors or users, so to help those on screen readers, you should wrap your toasts in an [`aria-live` region](https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Live_Regions). This allows screen readers the ability to see suggested interruptions without any visual cues.
-To improve accessibility level, we strongly recomend to use `autohide: false` and add a `close` button into the header to let user dismiss that element.
-You also need to adapt the `role` and `aria-live` level depending on the content. If it's an important message like error, use an `alert` role `assertive` otherwise use a role `status` with a `polite` level. 
+Toasts are intended to be small interruptions to your visitors or users, so to help those on screen readers, you should wrap your toasts in an [`aria-live` region](https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Live_Regions). This allows screen readers the ability to see suggested interruptions without any visual cues. If the information needed is important for the process, e.g. for a list of errors in a form, then use the [alert component]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/alerts/) instead of toast.
+
+You also need to adapt the `role` and `aria-live` level depending on the content. If it's an important message like an error, use `role="alert" aria-live="assertive"`, otherwise use `role="status" aria-live="polite"` attributes.
+
+As the content you're displaying changes, be sure to update the [`delay` timeout](#options) to ensure people have enough time to read the toast.
 
 {% highlight html %}
-<div role="alert" aria-live="assertive" aria-atomic="true">
+<div class="toast" role="alert" aria-live="assertive" aria-atomic="true" data-delay="10000">
   <div role="alert" aria-live="assertive" aria-atomic="true">...</div>
 </div>
 {% endhighlight %}
 
+When using `autohide: false`, you must add a close button to allow users to dismiss the toast.
+
+<div class="bg-light">
+{% capture example %}
+<div role="alert" aria-live="assertive" aria-atomic="true" class="toast" data-autohide="false">
+  <div class="toast-header">
+    <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
+    <strong class="mr-auto">Bootstrap</strong>
+    <small>11 mins ago</small>
+    <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
+      <span aria-hidden="true">&times;</span>
+    </button>
+  </div>
+  <div class="toast-body">
+    Hello, world! This is a toast message.
+  </div>
+</div>
+{% endcapture %}
+{% include example.html content=example %}
+</div>
+
 ## Placement
 
 Place toasts with custom CSS as you need them. The top right is often used for notifications, as is the top middle. If you're only ever going to show one toast at a time, put the positioning styles right on the `.toast.`
@@ -121,9 +138,6 @@ Place toasts with custom CSS as you need them. The top right is often used for n
       <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
       <strong class="mr-auto">Bootstrap</strong>
       <small>11 mins ago</small>
-      <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-        <span aria-hidden="true">&times;</span>
-      </button>
     </div>
     <div class="toast-body">
       Hello, world! This is a toast message.
@@ -148,9 +162,6 @@ For systems that generate more notifications, consider using a wrapping element
         <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
         <strong class="mr-auto">Bootstrap</strong>
         <small class="text-muted">just now</small>
-        <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-          <span aria-hidden="true">&times;</span>
-        </button>
       </div>
       <div class="toast-body">
         See? Just like this.
@@ -162,9 +173,6 @@ For systems that generate more notifications, consider using a wrapping element
         <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
         <strong class="mr-auto">Bootstrap</strong>
         <small class="text-muted">2 seconds ago</small>
-        <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
-          <span aria-hidden="true">&times;</span>
-        </button>
       </div>
       <div class="toast-body">
         Heads up, toasts will stack automatically
@@ -190,9 +198,6 @@ You can also get fancy with flexbox utilities.
         <img class="rounded mr-2" data-src="holder.js/20x20?size=1&text=.&bg=#007aff" alt="">
         <strong class="mr-auto">Bootstrap</strong>
         <small>11 mins ago</small>
-        <button type="button" class="close" data-dismiss="toast" aria-label="Close" style="">
-          <span aria-hidden="true">&times;</span>
-        </button>
       </div>
       <div class="toast-body">
         Hello, world! This is a toast message.