1 files changed, 156 insertions, 0 deletions
diff --git a/js/src/util.js b/js/src/util.js
new file mode 100644
index 0000000000..86bea65788
--- /dev/null
+++ b/js/src/util.js
@@ -0,0 +1,156 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.0.0): util.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const Util = (($) => {
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * Private TransitionEnd Helpers
+   * ------------------------------------------------------------------------
+   */
+
+  let transition = false
+
+  const TransitionEndEvent = {
+    WebkitTransition : 'webkitTransitionEnd',
+    MozTransition    : 'transitionend',
+    OTransition      : 'oTransitionEnd otransitionend',
+    transition       : 'transitionend'
+  }
+
+  // shoutout AngusCroll (https://goo.gl/pxwQGp)
+  function toType(obj) {
+    return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
+  }
+
+  function isElement(obj) {
+    return (obj[0] || obj).nodeType;
+  }
+
+  function getSpecialTransitionEndEvent() {
+    return {
+      bindType: transition.end,
+      delegateType: transition.end,
+      handle: function (event) {
+        if ($(event.target).is(this)) {
+          return event.handleObj.handler.apply(this, arguments)
+        }
+      }
+    }
+  }
+
+  function transitionEndTest() {
+    if (window.QUnit) {
+      return false
+    }
+
+    let el = document.createElement('bootstrap')
+
+    for (var name in TransitionEndEvent) {
+      if (el.style[name] !== undefined) {
+        return { end: TransitionEndEvent[name] }
+      }
+    }
+
+    return false
+  }
+
+  function transitionEndEmulator(duration) {
+    let called = false
+
+    $(this).one(Util.TRANSITION_END, function () {
+      called = true
+    })
+
+    setTimeout(() => {
+      if (!called) {
+        Util.triggerTransitionEnd(this)
+      }
+    }, duration)
+
+    return this
+  }
+
+  function setTransitionEndSupport() {
+    transition = transitionEndTest()
+
+    $.fn.emulateTransitionEnd = transitionEndEmulator
+
+    if (Util.supportsTransitionEnd()) {
+      $.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent()
+    }
+  }
+
+
+  /**
+   * --------------------------------------------------------------------------
+   * Public Util Api
+   * --------------------------------------------------------------------------
+   */
+
+  let Util = {
+
+    TRANSITION_END: 'bsTransitionEnd',
+
+    getUID(prefix) {
+      do prefix += ~~(Math.random() * 1000000)
+      while (document.getElementById(prefix))
+      return prefix
+    },
+
+    getSelectorFromElement(element) {
+      let selector = element.getAttribute('data-target')
+
+      if (!selector) {
+        selector = element.getAttribute('href') || ''
+        selector = /^#[a-z]/i.test(selector) ? selector : null
+      }
+
+      return selector
+    },
+
+    reflow(element) {
+      new Function('bs', 'return bs')(element.offsetHeight)
+    },
+
+    triggerTransitionEnd(element) {
+      $(element).trigger(transition.end)
+    },
+
+    supportsTransitionEnd() {
+      return !!transition
+    },
+
+    typeCheckConfig(componentName, config, configTypes) {
+
+      for (let property in configTypes) {
+        let expectedTypes = configTypes[property]
+        let value         = config[property]
+        let valueType
+
+        if (value && isElement(value)) valueType = 'element'
+        else valueType = toType(value)
+
+        if (!new RegExp(expectedTypes).test(valueType)) {
+          throw new Error(
+            `${componentName.toUpperCase()}: ` +
+            `Option "${property}" provided type "${valueType}" ` +
+            `but expected type "${expectedTypes}".`)
+        }
+      }
+    }
+
+  }
+
+  setTransitionEndSupport()
+
+  return Util
+
+})(jQuery)
+
+export default Util