Turned tags array into a Set

to avoid duplicates and have unique values.

random-choice-picker/script.js

@@ -16,7 +16,9 @@ textarea.addEventListener('keyup', (e) => {
 })
 
 function createTags(input) {
-    const tags = input.split(',').filter(tag => tag.trim() !== '').map(tag => tag.trim())
+    const tags = new Set(input.split(',')
+                          .filter(tag => tag.trim() !== '')
+                          .map(tag => tag.trim()))
     
     tagsEl.innerHTML = ''