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[ci skip]

dist/js/bootstrap.js

@@ -281,10 +281,15 @@ if (typeof jQuery === 'undefined') {
 
   $(document)
     .on('click.bs.button.data-api', '[data-toggle^="button"]', function (e) {
-      var $btn = $(e.target)
-      if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+      var $btn = $(e.target).closest('.btn')
       Plugin.call($btn, 'toggle')
-      if (!($(e.target).is('input[type="radio"]') || $(e.target).is('input[type="checkbox"]'))) e.preventDefault()
+      if (!($(e.target).is('input[type="radio"]') || $(e.target).is('input[type="checkbox"]'))) {
+        // Prevent double click on radios, and the double selections (so cancellation) on checkboxes
+        e.preventDefault()
+        // The target component still receive the focus
+        if ($btn.is('input,button')) $btn.trigger('focus')
+        else $btn.find('input:visible,button:visible').first().trigger('focus')
+      }
     })
     .on('focus.bs.button.data-api blur.bs.button.data-api', '[data-toggle^="button"]', function (e) {
       $(e.target).closest('.btn').toggleClass('focus', /^focus(in)?$/.test(e.type))
@@ -1050,7 +1055,7 @@ if (typeof jQuery === 'undefined') {
     $(document)
       .off('focusin.bs.modal') // guard against infinite focus loop
       .on('focusin.bs.modal', $.proxy(function (e) {
-        if (document !== event.target &&
+        if (document !== e.target &&
             this.$element[0] !== e.target &&
             !this.$element.has(e.target).length) {
           this.$element.trigger('focus')

docs/_includes/customizer-variables.html

@@ -263,7 +263,7 @@
   <div class="col-xs-4">
     <label for="input-@caret-width-base">@caret-width-base</label>
     <input id="input-@caret-width-base" type="text" aria-describedby="help-block-@caret-width-base" value="4px" data-var="@caret-width-base" class="form-control"/>
-    <p id="help-block-@caret-width-base" class="help-block">Width of the <code>border</code> for generating carets that indicator dropdowns.</p>
+    <p id="help-block-@caret-width-base" class="help-block">Width of the <code>border</code> for generating carets that indicate dropdowns.</p>
   </div>
   <div class="col-xs-4">
     <label for="input-@caret-width-large">@caret-width-large</label>

docs/assets/css/src/docs.css

@@ -1625,7 +1625,7 @@ h1[id] {
 
 /* Nullify ill-advised printing of hrefs; see #18711 */
 @media print {
-  a[href]:after {		
-    content: "" !important;		
+  a[href]:after {
+    content: "" !important;
   }
 }

docs/dist/js/bootstrap.js

@@ -281,10 +281,15 @@ if (typeof jQuery === 'undefined') {
 
   $(document)
     .on('click.bs.button.data-api', '[data-toggle^="button"]', function (e) {
-      var $btn = $(e.target)
-      if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+      var $btn = $(e.target).closest('.btn')
       Plugin.call($btn, 'toggle')
-      if (!($(e.target).is('input[type="radio"]') || $(e.target).is('input[type="checkbox"]'))) e.preventDefault()
+      if (!($(e.target).is('input[type="radio"]') || $(e.target).is('input[type="checkbox"]'))) {
+        // Prevent double click on radios, and the double selections (so cancellation) on checkboxes
+        e.preventDefault()
+        // The target component still receive the focus
+        if ($btn.is('input,button')) $btn.trigger('focus')
+        else $btn.find('input:visible,button:visible').first().trigger('focus')
+      }
     })
     .on('focus.bs.button.data-api blur.bs.button.data-api', '[data-toggle^="button"]', function (e) {
       $(e.target).closest('.btn').toggleClass('focus', /^focus(in)?$/.test(e.type))
@@ -1050,7 +1055,7 @@ if (typeof jQuery === 'undefined') {
     $(document)
       .off('focusin.bs.modal') // guard against infinite focus loop
       .on('focusin.bs.modal', $.proxy(function (e) {
-        if (document !== event.target &&
+        if (document !== e.target &&
             this.$element[0] !== e.target &&
             !this.$element.has(e.target).length) {
           this.$element.trigger('focus')