diff --git a/Data Structures/es6SetHasAndSize.js b/Data Structures/es6SetHasAndSize.js
new file mode 100644
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+++ b/Data Structures/es6SetHasAndSize.js	
@@ -0,0 +1,8 @@
+// https://www.freecodecamp.org/learn/coding-interview-prep/data-structures/use--has-and--size-on-an-es6-set
+
+function checkSet(arrToBeSet, checkValue) {
+  // Only change code below this line
+  const set = new Set(arrToBeSet);
+  return [set.has(checkValue), set.size];
+  // Only change code above this line
+}