js string join comma code example
Example 1: javascript array to comma separated string
var colors = ["red", "blue", "green"];
var colorsCSV = colors.join(","); //"red,blue,green"
Example 2: javascript join address to string
var address = "foo";
var city;
var state = "bar";
var zip;
text = [address, city, state, zip].filter(Boolean).join(", ");
console.log(text)