convert array to string separated by comma javascript 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 array to string without commas

arr.join("")

Example 3: javascript array to string without commas

[1, 2, 3].join(""); // 123