Variablize backdrop for modal and offcanvas

3 files changed, 55 insertions, 36 deletions

diff --git a/js/src/offcanvas.js b/js/src/offcanvas.js
index 88eb8c997a..016260437c 100644
--- a/js/src/offcanvas.js
+++ b/js/src/offcanvas.js
@@ -45,6 +45,7 @@ const DefaultType = {
 }
 
 const CLASS_NAME_SHOW = 'show'
+const CLASS_NAME_BACKDROP = 'offcanvas-backdrop'
 const OPEN_SELECTOR = '.offcanvas.show'
 
 const EVENT_SHOW = `show${EVENT_KEY}`
@@ -177,6 +178,7 @@ class Offcanvas extends BaseComponent {
 
   _initializeBackDrop() {
     return new Backdrop({
+      className: CLASS_NAME_BACKDROP,
       isVisible: this._config.backdrop,
       isAnimated: true,
       rootElement: this._element.parentNode,
diff --git a/js/src/util/backdrop.js b/js/src/util/backdrop.js
index 7ba7b4c43e..fbe32445ea 100644
--- a/js/src/util/backdrop.js
+++ b/js/src/util/backdrop.js
@@ -9,6 +9,7 @@ import EventHandler from '../dom/event-handler'
 import { execute, executeAfterTransition, getElement, reflow, typeCheckConfig } from './index'
 
 const Default = {
+  className: 'modal-backdrop',
   isVisible: true, // if false, we use the backdrop helper without adding any element to the dom
   isAnimated: false,
   rootElement: 'body', // give the choice to place backdrop under different elements
@@ -16,13 +17,13 @@ const Default = {
 }
 
 const DefaultType = {
+  className: 'string',
   isVisible: 'boolean',
   isAnimated: 'boolean',
   rootElement: '(element|string)',
   clickCallback: '(function|null)'
 }
 const NAME = 'backdrop'
-const CLASS_NAME_BACKDROP = 'modal-backdrop'
 const CLASS_NAME_FADE = 'fade'
 const CLASS_NAME_SHOW = 'show'
 
@@ -73,7 +74,7 @@ class Backdrop {
   _getElement() {
     if (!this._element) {
       const backdrop = document.createElement('div')
-      backdrop.className = CLASS_NAME_BACKDROP
+      backdrop.className = this._config.className
       if (this._config.isAnimated) {
         backdrop.classList.add(CLASS_NAME_FADE)
       }
diff --git a/js/tests/unit/util/backdrop.spec.js b/js/tests/unit/util/backdrop.spec.js
index 3150ba14db..59b7890717 100644
--- a/js/tests/unit/util/backdrop.spec.js
+++ b/js/tests/unit/util/backdrop.spec.js
@@ -230,46 +230,62 @@ describe('Backdrop', () => {
       })
     })
   })
-
-  describe('rootElement initialization', () => {
-    it('Should be appended on "document.body" by default', done => {
-      const instance = new Backdrop({
-        isVisible: true
-      })
-      const getElement = () => document.querySelector(CLASS_BACKDROP)
-      instance.show(() => {
-        expect(getElement().parentElement).toEqual(document.body)
-        done()
+  describe('Config', () => {
+    describe('rootElement initialization', () => {
+      it('Should be appended on "document.body" by default', done => {
+        const instance = new Backdrop({
+          isVisible: true
+        })
+        const getElement = () => document.querySelector(CLASS_BACKDROP)
+        instance.show(() => {
+          expect(getElement().parentElement).toEqual(document.body)
+          done()
+        })
       })
-    })
 
-    it('Should find the rootElement if passed as a string', done => {
-      const instance = new Backdrop({
-        isVisible: true,
-        rootElement: 'body'
-      })
-      const getElement = () => document.querySelector(CLASS_BACKDROP)
-      instance.show(() => {
-        expect(getElement().parentElement).toEqual(document.body)
-        done()
+      it('Should find the rootElement if passed as a string', done => {
+        const instance = new Backdrop({
+          isVisible: true,
+          rootElement: 'body'
+        })
+        const getElement = () => document.querySelector(CLASS_BACKDROP)
+        instance.show(() => {
+          expect(getElement().parentElement).toEqual(document.body)
+          done()
+        })
       })
-    })
 
-    it('Should appended on any element given by the proper config', done => {
-      fixtureEl.innerHTML = [
-        '<div id="wrapper">',
-        '</div>'
-      ].join('')
+      it('Should appended on any element given by the proper config', done => {
+        fixtureEl.innerHTML = [
+          '<div id="wrapper">',
+          '</div>'
+        ].join('')
 
-      const wrapper = fixtureEl.querySelector('#wrapper')
-      const instance = new Backdrop({
-        isVisible: true,
-        rootElement: wrapper
+        const wrapper = fixtureEl.querySelector('#wrapper')
+        const instance = new Backdrop({
+          isVisible: true,
+          rootElement: wrapper
+        })
+        const getElement = () => document.querySelector(CLASS_BACKDROP)
+        instance.show(() => {
+          expect(getElement().parentElement).toEqual(wrapper)
+          done()
+        })
       })
-      const getElement = () => document.querySelector(CLASS_BACKDROP)
-      instance.show(() => {
-        expect(getElement().parentElement).toEqual(wrapper)
-        done()
+    })
+
+    describe('ClassName', () => {
+      it('Should be able to have different classNames than default', done => {
+        const instance = new Backdrop({
+          isVisible: true,
+          className: 'foo'
+        })
+        const getElement = () => document.querySelector('.foo')
+        instance.show(() => {
+          expect(getElement()).toEqual(instance._getElement())
+          instance.dispose()
+          done()
+        })
       })
     })
   })