join is js code example
Example 1: javascript array to comma separated string
var colors = ["red", "blue", "green"];
var colorsCSV = colors.join(","); //"red,blue,green"
Example 2: js join
//turns array to string
const elements = ['Fire', 'Air', 'Water'];
console.log(elements.join());
// expected output: "Fire,Air,Water"
console.log(elements.join(''));
// expected output: "FireAirWater"
console.log(elements.join('-'));
// expected output: "Fire-Air-Water"