Tweak placeholder.svg.

* always include the title
* make it possible to skip adding the title by passing `title=' '`
* remove viewBox since we don't need it

site/_includes/icons/placeholder.svg

@@ -1,36 +1,35 @@
-{%- if include.width -%}
+{%- comment -%}
-  {% assign width = include.width %}
+  Usage: include icons/placeholder.svg args
-{%- else -%}
-  {% assign width = '100%' %}
-{%- endif -%}
 
-{%- if include.height -%}
+  args can be one of the following:
-  {% assign height = include.height %}
+    title: Used in the SVG `title` tag
-{%- else -%}
+    text: The text to show in the image - default: 'width x height'
-  {% assign height = 180 %}
+    class: default: 'bd-placeholder-img'
-{%- endif -%}
+    color: The text color (foreground) - default: '#ddd'
+    background: The background color - default: '#777'
+    width: default: 100%
+    height: default: 180px
+{%- endcomment -%}
+
+{%- assign title = include.title | default: 'Generic Placeholder Image' -%}
+{%- assign class = include.class | default: '' -%}
+{%- assign color = include.color | default: '#ddd' -%}
+{%- assign background = include.background | default: '#777' -%}
+{%- assign width = include.width | default: '100%' -%}
+{%- assign height = include.height | default: '180' -%}
 
 {%- if include.text -%}
-  {% assign text = include.text %}
+  {%- assign text = include.text -%}
 {%- else -%}
-  {% assign text = width | append: 'x' | append: height %}
+  {%- assign text = width | append: 'x' | append: height -%}
 {%- endif -%}
 
-{%- if include.class -%}
+{%- capture svg -%}
-  {% assign class = include.class| prepend: ' ' %}
+<svg class="bd-placeholder-img{% if class != '' %} {{ class }}{% endif %}" width="{{ width }}" height="{{ height }}" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice">
-{%- endif -%}
+  {% if title != ' ' %}<title>{{ title }}</title>{% endif %}
+  <rect fill="{{ background }}" width="100%" height="100%"/>
+  {% if text != ' ' %}<text fill="{{ color }}" dy=".3em" x="50%" y="50%">{{ text }}</text>{% endif %}
+</svg>
+{%- endcapture -%}
 
-{%- if include.color -%}
+{{- svg | replace: '  ', '' | strip_newlines -}}
-  {% assign color = include.color %}
-{%- else -%}
-  {% assign color = '#ddd' %}
-{%- endif -%}
-
-{%- if include.background -%}
-  {% assign background = include.background %}
-{%- else -%}
-  {% assign background = '#777' %}
-{%- endif -%}
-
-<svg class="bd-placeholder-img{{ class }}" width="{{ width }}" height="{{ height }}" xmlns="http://www.w3.org/2000/svg"{% if include.viewBox %} viewBox="{{ include.viewBox }}"{% endif %} preserveAspectRatio="xMidYMid slice">{% if include.title %}<title>{{ include.title }}</title>{% endif %}<rect fill="{{ background }}" width="100%" height="100%" /><text x="50%" y="50%" dy=".3em" fill="{{ color }}">{{ text }}</text></svg>
-{{- '' -}}

site/docs/4.1/components/carousel.md

@@ -32,13 +32,13 @@ Here's a carousel with slides only. Note the presence of the `.d-block` and `.w-
 <div id="carouselExampleSlidesOnly" class="carousel slide" data-ride="carousel">
   <div class="carousel-inner">
     <div class="carousel-item active">
-        {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+        {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
     </div>
   </div>
 </div>
@@ -53,13 +53,13 @@ Adding in the previous and next controls:
 <div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
   <div class="carousel-inner">
     <div class="carousel-item active">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
     </div>
   </div>
   <a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
@@ -87,13 +87,13 @@ You can also add the indicators to the carousel, alongside the controls, too.
   </ol>
   <div class="carousel-inner">
     <div class="carousel-item active">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
     </div>
   </div>
   <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
@@ -121,21 +121,21 @@ Add captions to your slides easily with the `.carousel-caption` element within a
     </ol>
     <div class="carousel-inner">
       <div class="carousel-item active">
-        {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+        {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
         <div class="carousel-caption d-none d-md-block">
           <h5>First slide label</h5>
           <p>Nulla vitae elit libero, a pharetra augue mollis interdum.</p>
         </div>
       </div>
       <div class="carousel-item">
-        {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+        {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
         <div class="carousel-caption d-none d-md-block">
           <h5>Second slide label</h5>
           <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
         </div>
       </div>
       <div class="carousel-item">
-        {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+        {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
         <div class="carousel-caption d-none d-md-block">
           <h5>Third slide label</h5>
           <p>Praesent commodo cursus magna, vel scelerisque nisl consectetur.</p>
@@ -171,13 +171,13 @@ Add `.carousel-fade` to your carousel to animate slides with a fade transition i
 <div id="carouselExampleFade" class="carousel slide carousel-fade" data-ride="carousel">
   <div class="carousel-inner">
     <div class="carousel-item active">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
     </div>
   </div>
   <a class="carousel-control-prev" href="#carouselExampleFade" role="button" data-slide="prev">
@@ -200,13 +200,13 @@ Add `data-interval=""` to a `.carousel-item` to change the amount of time to del
 <div id="carouselExampleInterval" class="carousel slide" data-ride="carousel">
   <div class="carousel-inner">
     <div class="carousel-item active" data-interval="10000">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#555" background="#777" text="First slide" title="First slide" %}
     </div>
     <div class="carousel-item" data-interval="2000">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#444" background="#666" text="Second slide" title="Second slide" %}
     </div>
     <div class="carousel-item">
-      {% include icons/placeholder.svg width="800" height="400" viewBox="0 0 800 400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
+      {% include icons/placeholder.svg width="800" height="400" class="bd-placeholder-img-lg d-block w-100" color="#333" background="#555" text="Third slide" title="Third slide" %}
     </div>
   </div>
   <a class="carousel-control-prev" href="#carouselExampleInterval" role="button" data-slide="prev">