diff --git a/js/src/alert/alert.js b/js/src/alert/alert.js
index 024528b81..fde2db9b9 100644
--- a/js/src/alert/alert.js
+++ b/js/src/alert/alert.js
@@ -5,16 +5,11 @@
  * --------------------------------------------------------------------------
  */
 
-import {
-  getjQuery,
-  TRANSITION_END,
-  emulateTransitionEnd,
-  getElementFromSelector,
-  getTransitionDurationFromElement
-} from '../util/index'
+import { getjQuery } from '../util/index'
+import { getRootElement, removeElement, triggerCloseEvent } from './private'
+import { DATA_KEY, Event } from './constants'
 import Data from '../dom/data'
 import EventHandler from '../dom/event-handler'
-import SelectorEngine from '../dom/selector-engine'
 
 /**
  * ------------------------------------------------------------------------
@@ -24,26 +19,10 @@ import SelectorEngine from '../dom/selector-engine'
 
 const NAME = 'alert'
 const VERSION = '4.3.1'
-const DATA_KEY = 'bs.alert'
-const EVENT_KEY = `.${DATA_KEY}`
-const DATA_API_KEY = '.data-api'
-
 const Selector = {
   DISMISS: '[data-dismiss="alert"]'
 }
 
-const Event = {
-  CLOSE: `close${EVENT_KEY}`,
-  CLOSED: `closed${EVENT_KEY}`,
-  CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`
-}
-
-const ClassName = {
-  ALERT: 'alert',
-  FADE: 'fade',
-  SHOW: 'show'
-}
-
 /**
  * ------------------------------------------------------------------------
  * Class Definition
@@ -70,16 +49,16 @@ class Alert {
   close(element) {
     let rootElement = this._element
     if (element) {
-      rootElement = this._getRootElement(element)
+      rootElement = getRootElement(element)
     }
 
-    const customEvent = this._triggerCloseEvent(rootElement)
+    const customEvent = triggerCloseEvent(rootElement)
 
     if (customEvent === null || customEvent.defaultPrevented) {
       return
     }
 
-    this._removeElement(rootElement)
+    removeElement(rootElement)
   }
 
   dispose() {
@@ -87,45 +66,6 @@ class Alert {
     this._element = null
   }
 
-  // Private
-
-  _getRootElement(element) {
-    let parent = getElementFromSelector(element)
-
-    if (!parent) {
-      parent = SelectorEngine.closest(element, `.${ClassName.ALERT}`)
-    }
-
-    return parent
-  }
-
-  _triggerCloseEvent(element) {
-    return EventHandler.trigger(element, Event.CLOSE)
-  }
-
-  _removeElement(element) {
-    element.classList.remove(ClassName.SHOW)
-
-    if (!element.classList.contains(ClassName.FADE)) {
-      this._destroyElement(element)
-      return
-    }
-
-    const transitionDuration = getTransitionDurationFromElement(element)
-
-    EventHandler
-      .one(element, TRANSITION_END, () => this._destroyElement(element))
-    emulateTransitionEnd(element, transitionDuration)
-  }
-
-  _destroyElement(element) {
-    if (element.parentNode) {
-      element.parentNode.removeChild(element)
-    }
-
-    EventHandler.trigger(element, Event.CLOSED)
-  }
-
   // Static
 
   static jQueryInterface(config) {
diff --git a/js/src/alert/alert.spec.js b/js/src/alert/alert.spec.js
index 61d656bd0..adaea8d08 100644
--- a/js/src/alert/alert.spec.js
+++ b/js/src/alert/alert.spec.js
@@ -90,13 +90,11 @@ describe('Alert', () => {
 
       const endTest = () => {
         setTimeout(() => {
-          expect(alert._removeElement).not.toHaveBeenCalled()
+          expect(fixtureEl.querySelector('.alert')).not.toBeNull()
           done()
         }, 10)
       }
 
-      spyOn(alert, '_removeElement')
-
       alertEl.addEventListener('close.bs.alert', event => {
         event.preventDefault()
         endTest()
diff --git a/js/src/alert/constants.js b/js/src/alert/constants.js
new file mode 100644
index 000000000..3ba4299ce
--- /dev/null
+++ b/js/src/alert/constants.js
@@ -0,0 +1,22 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): alert constants
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+export const DATA_KEY = 'bs.alert'
+
+const DATA_API_KEY = '.data-api'
+const EVENT_KEY = `.${DATA_KEY}`
+export const Event = {
+  CLOSE: `close${EVENT_KEY}`,
+  CLOSED: `closed${EVENT_KEY}`,
+  CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`
+}
+
+export const ClassName = {
+  ALERT: 'alert',
+  FADE: 'fade',
+  SHOW: 'show'
+}
diff --git a/js/src/alert/private.js b/js/src/alert/private.js
new file mode 100644
index 000000000..46d87ff43
--- /dev/null
+++ b/js/src/alert/private.js
@@ -0,0 +1,53 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): private alert functions
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+import {
+  TRANSITION_END,
+  emulateTransitionEnd,
+  getElementFromSelector,
+  getTransitionDurationFromElement
+} from '../util/index'
+import EventHandler from '../dom/event-handler'
+import SelectorEngine from '../dom/selector-engine'
+import { ClassName, Event } from './constants'
+
+export const getRootElement = element => {
+  let parent = getElementFromSelector(element)
+
+  if (!parent) {
+    parent = SelectorEngine.closest(element, `.${ClassName.ALERT}`)
+  }
+
+  return parent
+}
+
+export const triggerCloseEvent = element => {
+  return EventHandler.trigger(element, Event.CLOSE)
+}
+
+export const removeElement = element => {
+  element.classList.remove(ClassName.SHOW)
+
+  if (!element.classList.contains(ClassName.FADE)) {
+    destroyElement(element)
+    return
+  }
+
+  const transitionDuration = getTransitionDurationFromElement(element)
+
+  EventHandler
+    .one(element, TRANSITION_END, () => destroyElement(element))
+  emulateTransitionEnd(element, transitionDuration)
+}
+
+const destroyElement = element => {
+  if (element.parentNode) {
+    element.parentNode.removeChild(element)
+  }
+
+  EventHandler.trigger(element, Event.CLOSED)
+}