Enforce a consistent ES6 coding style

Replace the old (and broken) jshint + jscsrc by eslint and configure
it to support some of the ES6 features.

The command `eslint` currently has one error which is a bug that was
discovered by its static analysis and should be fixed (usage of a
dead object).

1 files changed, 13 insertions, 15 deletions

diff --git a/client/lib/cssEvents.js b/client/lib/cssEvents.js
index 487ba69b..39c3fb90 100644
--- a/client/lib/cssEvents.js
+++ b/client/lib/cssEvents.js
@@ -1,42 +1,40 @@
 // XXX Should we use something like Moderniz instead of our custom detector?
 
-var whichTransitionEvent = function() {
-  var t;
-  var el = document.createElement('fakeelement');
-  var transitions = {
+function whichTransitionEvent() {
+  const el = document.createElement('fakeelement');
+  const transitions = {
     transition:'transitionend',
     OTransition:'oTransitionEnd',
     MSTransition:'msTransitionEnd',
     MozTransition:'transitionend',
-    WebkitTransition:'webkitTransitionEnd'
+    WebkitTransition:'webkitTransitionEnd',
   };
 
-  for (t in transitions) {
+  for (const t in transitions) {
     if (el.style[t] !== undefined) {
       return transitions[t];
     }
   }
-};
+}
 
-var whichAnimationEvent = function() {
-  var t;
-  var el = document.createElement('fakeelement');
-  var transitions = {
+function whichAnimationEvent() {
+  const el = document.createElement('fakeelement');
+  const transitions = {
     animation:'animationend',
     OAnimation:'oAnimationEnd',
     MSTransition:'msAnimationEnd',
     MozAnimation:'animationend',
-    WebkitAnimation:'webkitAnimationEnd'
+    WebkitAnimation:'webkitAnimationEnd',
   };
 
-  for (t in transitions) {
+  for (const t in transitions) {
     if (el.style[t] !== undefined) {
       return transitions[t];
     }
   }
-};
+}
 
 CSSEvents = {
   transitionend: whichTransitionEvent(),
-  animationend: whichAnimationEvent()
+  animationend: whichAnimationEvent(),
 };