New examples screenshots. (#24395)

The images are PNG 8-bit optimized with optipng, zopflipng and pngout.

diff --git a/docs/4.0/examples/index.md b/docs/4.0/examples/index.md
index 8546a86987aeaf2d1096a9b8f3be059395373e4e..1f0ab533997d9c8ce5a064bf88fed2ffe134d124 100644 (file)
--- a/docs/4.0/examples/index.md
+++ b/docs/4.0/examples/index.md
@@ -14,14 +14,14 @@ Examples that focus on implementing uses of built-in components provided by Boot
 <div class="row bd-examples">
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/starter-template/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/starter-template.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/starter-template.png" alt="" width="800" height="600">
       <h4>Starter template</h4>
     </a>
     <p>Nothing but the basics: compiled CSS and JavaScript.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/grid/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/grid.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/grid.png" alt="" width="800" height="600">
       <h4>Grids</h4>
     </a>
     <p>Multiple examples of grid layouts with all four tiers, nesting, and more.</p>
@@ -30,14 +30,14 @@ Examples that focus on implementing uses of built-in components provided by Boot
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/jumbotron/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/jumbotron.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/jumbotron.png" alt="" width="800" height="600">
       <h4>Jumbotron</h4>
     </a>
     <p>Build around the jumbotron with a navbar and some basic grid columns.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/narrow-jumbotron/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/jumbotron-narrow.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/jumbotron-narrow.png" alt="" width="800" height="600">
       <h4>Narrow jumbotron</h4>
     </a>
     <p>Build a more custom page by narrowing the default container and jumbotron.</p>
@@ -51,14 +51,14 @@ Taking the default navbar component and showing how it can be moved, placed, and
 <div class="row bd-examples">
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/navbars/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar.png" alt="" width="800" height="600">
       <h4>Navbar</h4>
     </a>
     <p>Super basic template that includes the navbar along with some additional content.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/navbar-top/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-static.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-static.png" alt="" width="800" height="600">
       <h4>Static top navbar</h4>
     </a>
     <p>Super basic template with a static top navbar along with some additional content.</p>
@@ -67,14 +67,14 @@ Taking the default navbar component and showing how it can be moved, placed, and
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/navbar-top-fixed/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-fixed.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-fixed.png" alt="" width="800" height="600">
       <h4>Fixed navbar</h4>
     </a>
     <p>Super basic template with a fixed top navbar along with some additional content.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/navbar-bottom/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-bottom.jpg" alt="">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/navbar-bottom.png" alt="">
       <h4>Bottom navbar</h4>
     </a>
     <p>Super basic template with a bottom navbar along with some additional content.</p>
@@ -88,14 +88,14 @@ Brand new components and templates to help folks quickly get started with Bootst
 <div class="row bd-examples">
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/album/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/album.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/album.png" alt="" width="800" height="600">
       <h4>Album</h4>
     </a>
     <p>Simple one-page template for photo galleries, portfolios, and more.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/cover/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/cover.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/cover.png" alt="" width="800" height="600">
       <h4>Cover</h4>
     </a>
     <p>A one-page template for building simple and beautiful home pages.</p>
@@ -104,14 +104,14 @@ Brand new components and templates to help folks quickly get started with Bootst
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/carousel/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/carousel.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/carousel.png" alt="" width="800" height="600">
       <h4>Carousel</h4>
     </a>
     <p>Customize the navbar and carousel, then add some new components.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/blog/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/blog.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/blog.png" alt="" width="800" height="600">
       <h4>Blog</h4>
     </a>
     <p>Simple two-column blog layout with custom navigation, header, and type.</p>
@@ -120,14 +120,14 @@ Brand new components and templates to help folks quickly get started with Bootst
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/dashboard/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/dashboard.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/dashboard.png" alt="" width="800" height="600">
       <h4>Dashboard</h4>
     </a>
     <p>Basic admin dashboard shell with fixed sidebar and navbar.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/signin/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sign-in.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sign-in.png" alt="" width="800" height="600">
       <h4>Sign-in page</h4>
     </a>
     <p>Custom form layout and design for a simple sign in form.</p>
@@ -136,14 +136,14 @@ Brand new components and templates to help folks quickly get started with Bootst
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/justified-nav/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/justified-nav.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/justified-nav.png" alt="" width="800" height="600">
       <h4>Justified nav</h4>
     </a>
     <p>Create a custom navbar with justified links. Heads up! Not too Safari friendly.</p>
   </div>
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/sticky-footer/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sticky-footer.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sticky-footer.png" alt="" width="800" height="600">
       <h4>Sticky footer</h4>
     </a>
     <p>Attach a footer to the bottom of the viewport when the content is shorter than it.</p>
@@ -152,7 +152,7 @@ Brand new components and templates to help folks quickly get started with Bootst
 
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/sticky-footer-navbar/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sticky-footer-navbar.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/sticky-footer-navbar.png" alt="" width="800" height="600">
       <h4>Sticky footer w/ navbar</h4>
     </a>
     <p>Attach a footer to the bottom of the viewport with a fixed top navbar.</p>
@@ -166,7 +166,7 @@ Examples that focus on future-friendly features or techniques.
 <div class="row bd-examples">
   <div class="col-6 col-md-4">
     <a href="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/offcanvas/">
-      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/offcanvas.jpg" alt="" width="800" height="600">
+      <img class="img-thumbnail" src="{{ site.baseurl }}/docs/{{ site.docs_version }}/examples/screenshots/offcanvas.png" alt="" width="800" height="600">
       <h4>Offcanvas</h4>
     </a>
     <p>Build a toggleable off-canvas navigation menu for use with Bootstrap.</p>

diff --git a/docs/4.0/examples/screenshots/album.jpg b/docs/4.0/examples/screenshots/album.jpg
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