how to merge an array into string code example
Example 1: javascript array to comma separated string
var colors = ["red", "blue", "green"];
var colorsCSV = colors.join(","); //"red,blue,green"
Example 2: join array javascript
<html>
<select multiple class="select-colors">
<option>blue</option>
<option>green</option>
</select>
</html>
<script>
var myColorSelect = $(".select-colors").val().join();
console.log(myColorSelect);
</script>