Avoid Array.prototype.fill()

src/components/skins.js

@@ -29,7 +29,8 @@ export default class Skins extends React.Component {
 
     return <div>
       <div className={`emoji-mart-skin-swatches ${opened ? 'emoji-mart-skin-swatches-opened' : ''}`}>
-        {Array(6).fill().map((_, i) => {
+        {/* Use Array.prototype.fill() when it is more widely supported. */}
+        {[...Array(6)].map((_, i) => {
           var skinTone = i + 1,
               selected = skinTone == skin
 

src/utils/frequently.js

@@ -37,7 +37,8 @@ function get(perLine) {
   if (!frequently) {
     defaults = {}
 
-    return Array(perLine).fill('').map((_, i) => {
+    // Use Array.prototype.fill() when it is more widely supported.
+    return [...Array(perLine)].map((_, i) => {
       defaults[DEFAULTS[i]] = perLine - i
       return DEFAULTS[i]
     })