Minor lint tweaks and rules cleanup

js/src/dropdown.js

@@ -531,5 +531,4 @@ $.fn[NAME].noConflict = () => {
   return Dropdown._jQueryInterface
 }
 
-
 export default Dropdown

js/src/modal.js

@@ -179,7 +179,6 @@ class Modal {
     $(this._element).off(EVENT_CLICK_DISMISS)
     $(this._dialog).off(EVENT_MOUSEDOWN_DISMISS)
 
-
     if (transition) {
       const transitionDuration  = Util.getTransitionDurationFromElement(this._element)
 

js/src/tools/sanitizer.js

@@ -57,14 +57,14 @@ export const DefaultWhitelist = {
  *
  * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
  */
-const SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi
+const SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^#&/:?]*(?:[#/?]|$))/gi
 
 /**
  * A pattern that matches safe data URLs. Only matches image, video and audio types.
  *
  * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
  */
-const DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i
+const DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[\d+/a-z]+=*$/i
 
 function allowedAttribute(attr, allowedAttributeList) {
   const attrName = attr.nodeName.toLowerCase()

js/src/util.js

@@ -34,7 +34,7 @@ function getSpecialTransitionEndEvent() {
       if ($(event.target).is(this)) {
         return event.handleObj.handler.apply(this, arguments) // eslint-disable-line prefer-rest-params
       }
-      return undefined // eslint-disable-line no-undefined
+      return undefined
     }
   }
 }