(ml5717) Fixed interval sort comparitor

src/canvas.js

@@ -107,6 +107,7 @@ const ensurePathGroupElem = (id) => {
   }
 
   groupElem.innerHTML = ""
+
   return groupElem
 }
 

src/erasure.js

@@ -103,7 +103,7 @@ function overlaps([s1, e1], [, e2]) {
 
 function mergeIntervals(...intervals) {
   if (!intervals.length) return []
-  const sorted = intervals.sort(([a], [b]) => a > b)
+  const sorted = intervals.sort(([a], [b]) => a - b)
   const stack = [sorted[0]]
   sorted.forEach((x) => {
     const top = stack[stack.length - 1]