Merge branch 'v4' of https://github.com/twbs/derpstrap into v4

Conflicts:
	dist/css/bootstrap.css
	dist/css/bootstrap.css.map
	docs/assets/css/docs.min.css

1 files changed, 287 insertions, 0 deletions

diff --git a/js/src/tab.js b/js/src/tab.js
new file mode 100644
index 000000000..4d8d7dec8
--- /dev/null
+++ b/js/src/tab.js
@@ -0,0 +1,287 @@
+import Util from './util'
+
+
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.0.0): tab.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const Tab = (($) => {
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * Constants
+   * ------------------------------------------------------------------------
+   */
+
+  const NAME                = 'tab'
+  const VERSION             = '4.0.0'
+  const DATA_KEY            = 'bs.tab'
+  const EVENT_KEY           = `.${DATA_KEY}`
+  const DATA_API_KEY        = '.data-api'
+  const JQUERY_NO_CONFLICT  = $.fn[NAME]
+  const TRANSITION_DURATION = 150
+
+  const Event = {
+    HIDE           : `hide${EVENT_KEY}`,
+    HIDDEN         : `hidden${EVENT_KEY}`,
+    SHOW           : `show${EVENT_KEY}`,
+    SHOWN          : `shown${EVENT_KEY}`,
+    CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`
+  }
+
+  const ClassName = {
+    DROPDOWN_MENU : 'dropdown-menu',
+    ACTIVE        : 'active',
+    FADE          : 'fade',
+    IN            : 'in'
+  }
+
+  const Selector = {
+    A                     : 'a',
+    LI                    : 'li',
+    LI_DROPDOWN           : 'li.dropdown',
+    UL                    : 'ul:not(.dropdown-menu)',
+    FADE_CHILD            : '> .fade',
+    ACTIVE                : '.active',
+    ACTIVE_CHILD          : '> .active',
+    DATA_TOGGLE           : '[data-toggle="tab"], [data-toggle="pill"]',
+    DROPDOWN_ACTIVE_CHILD : '> .dropdown-menu > .active'
+  }
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * Class Definition
+   * ------------------------------------------------------------------------
+   */
+
+  class Tab {
+
+    constructor(element) {
+      this._element = element
+    }
+
+
+    // getters
+
+    static get VERSION() {
+      return VERSION
+    }
+
+
+    // public
+
+    show() {
+      if (this._element.parentNode &&
+         (this._element.parentNode.nodeType == Node.ELEMENT_NODE) &&
+         ($(this._element).parent().hasClass(ClassName.ACTIVE))) {
+        return
+      }
+
+      let target
+      let previous
+      let ulElement = $(this._element).closest(Selector.UL)[0]
+      let selector  = Util.getSelectorFromElement(this._element)
+
+      if (ulElement) {
+        previous = $.makeArray($(ulElement).find(Selector.ACTIVE))
+        previous = previous[previous.length - 1]
+
+        if (previous) {
+          previous = $(previous).find(Selector.A)[0]
+        }
+      }
+
+      let hideEvent = $.Event(Event.HIDE, {
+        relatedTarget: this._element
+      })
+
+      let showEvent = $.Event(Event.SHOW, {
+        relatedTarget: previous
+      })
+
+      if (previous) {
+        $(previous).trigger(hideEvent)
+      }
+
+      $(this._element).trigger(showEvent)
+
+      if (showEvent.isDefaultPrevented() ||
+         (hideEvent.isDefaultPrevented())) {
+        return
+      }
+
+      if (selector) {
+        target = $(selector)[0]
+      }
+
+      this._activate(
+        $(this._element).closest(Selector.LI)[0],
+        ulElement
+      )
+
+      let complete = () => {
+        let hiddenEvent = $.Event(Event.HIDDEN, {
+          relatedTarget: this._element
+        })
+
+        let shownEvent  = $.Event(Event.SHOWN, {
+          relatedTarget: previous
+        })
+
+        $(previous).trigger(hiddenEvent)
+        $(this._element).trigger(shownEvent)
+      }
+
+      if (target) {
+        this._activate(target, target.parentNode, complete)
+      } else {
+        complete()
+      }
+    }
+
+    dispose() {
+      $.removeClass(this._element, DATA_KEY)
+      this._element = null
+    }
+
+
+    // private
+
+    _activate(element, container, callback) {
+      let active          = $(container).find(Selector.ACTIVE_CHILD)[0]
+      let isTransitioning = callback
+        && Util.supportsTransitionEnd()
+        && ((active && $(active).hasClass(ClassName.FADE))
+           || !!$(container).find(Selector.FADE_CHILD)[0])
+
+      let complete = $.proxy(
+        this._transitionComplete,
+        this,
+        element,
+        active,
+        isTransitioning,
+        callback
+      )
+
+      if (active && isTransitioning) {
+        $(active)
+          .one(Util.TRANSITION_END, complete)
+          .emulateTransitionEnd(TRANSITION_DURATION)
+
+      } else {
+        complete()
+      }
+
+      if (active) {
+        $(active).removeClass(ClassName.IN)
+      }
+    }
+
+    _transitionComplete(element, active, isTransitioning, callback) {
+      if (active) {
+        $(active).removeClass(ClassName.ACTIVE)
+
+        let dropdownChild = $(active).find(
+          Selector.DROPDOWN_ACTIVE_CHILD
+        )[0]
+        if (dropdownChild) {
+          $(dropdownChild).removeClass(ClassName.ACTIVE)
+        }
+
+        let activeToggle = $(active).find(Selector.DATA_TOGGLE)[0]
+        if (activeToggle) {
+          activeToggle.setAttribute('aria-expanded', false)
+        }
+      }
+
+      $(element).addClass(ClassName.ACTIVE)
+
+      let elementToggle = $(element).find(Selector.DATA_TOGGLE)[0]
+      if (elementToggle) {
+        elementToggle.setAttribute('aria-expanded', true)
+      }
+
+      if (isTransitioning) {
+        Util.reflow(element)
+        $(element).addClass(ClassName.IN)
+      } else {
+        $(element).removeClass(ClassName.FADE)
+      }
+
+      if (element.parentNode &&
+         ($(element.parentNode).hasClass(ClassName.DROPDOWN_MENU))) {
+
+        let dropdownElement = $(element).closest(Selector.LI_DROPDOWN)[0]
+        if (dropdownElement) {
+          $(dropdownElement).addClass(ClassName.ACTIVE)
+        }
+
+        elementToggle = $(element).find(Selector.DATA_TOGGLE)[0]
+        if (elementToggle) {
+          elementToggle.setAttribute('aria-expanded', true)
+        }
+      }
+
+      if (callback) {
+        callback()
+      }
+    }
+
+
+    // static
+
+    static _jQueryInterface(config) {
+      return this.each(function () {
+        let $this = $(this)
+        let data  = $this.data(DATA_KEY)
+
+        if (!data) {
+          data = data = new Tab(this)
+          $this.data(DATA_KEY, data)
+        }
+
+        if (typeof config === 'string') {
+          data[config]()
+        }
+      })
+    }
+
+  }
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * Data Api implementation
+   * ------------------------------------------------------------------------
+   */
+
+  $(document)
+    .on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
+    event.preventDefault()
+    Tab._jQueryInterface.call($(this), 'show')
+  })
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * jQuery
+   * ------------------------------------------------------------------------
+   */
+
+  $.fn[NAME]             = Tab._jQueryInterface
+  $.fn[NAME].Constructor = Tab
+  $.fn[NAME].noConflict  = function () {
+    $.fn[NAME] = JQUERY_NO_CONFLICT
+    return Tab._jQueryInterface
+  }
+
+  return Tab
+
+})(jQuery)
+
+export default Tab