More use of new directives

Author: Gijs Jorissen

resources/views/bs4/alert.blade.php

@@ -6,7 +6,6 @@ class="alert alert-{{ $severity }}
  "
  role="alert"
 >
-
  @istrue($dismissible)
  <button type="button" class="close" data-dismiss="alert" aria-label="Close">
  <span aria-hidden="true">&times;</span>

resources/views/bs4/jumbotron.blade.php

@@ -1,15 +1,20 @@
-<div class="jumbotron {{ $class or '' }} @if(isset($fullwidth) && $fullwidth) jumbotron-fluid @endif">
- @if(isset($fullwidth) && $fullwidth)
+<div
+ class="jumbotron
+ {{ $class or '' }}
+ @istrue($fullwidth, 'jumbotron-fluid')
+ "
+>
+ @istrue($fullwidth)
  <div class="container">
- @endif
+ @endistrue
 
  @isset($heading)
  <h1 class="display-3">{{ $heading }}</h1>
  @endisset
 
  {{ $slot }}
 
- @if(isset($fullwidth) && $fullwidth)
+ @istrue($fullwidth)
  </div>
- @endif
+ @endistrue
 </div>