Apply suggestions from code review

Author: archmoj

draftlogs/6780_fix.md

@@ -1 +1 @@
-- Fix `Cannot read properties of undefined (reading '0')` when the mouse moves to x=0 while dragging a rangeslider [[#6780](https://github.com/plotly/plotly.js/pull/6780)]
+- Fix `Cannot read properties of undefined (reading '0')` when the mouse moves to x=0 while dragging a rangeslider [[#6780](https://github.com/plotly/plotly.js/pull/6780)], with thanks to @david-bezero for the contribution!

src/components/rangeslider/draw.js

@@ -225,10 +225,10 @@ module.exports = function(gd) {
 };
 
 function eventX(event) {
-    if (typeof event.clientX === 'number') {
+    if(typeof event.clientX === 'number') {
         return event.clientX;
     }
-    if (event.touches && event.touches.length > 0) {
+    if(event.touches && event.touches.length > 0) {
         return event.touches[0].clientX;
     }
     return 0;