Use toString() method to convert an Array to a comma-separated string in JavaScript. The method array.toString() actually calls array.join() which results in a string concatenated by commas.
array.toString(Or pass the array as a parameter to the String object – String(arr). The String object will convert the passed-in array to a comma-separated string and return the result.
Array to comma-separated string JavaScript
Simple example code.
<!DOCTYPE html>
<html>
<body>
<script>
var array = ['a','b','c','d','e','f'];
console.log(array.toString());
const arr = ['one', 'two', 'three'];
const str = String(arr);
console.log(str);
console.log(typeof str);
</script>
</body>
</html>Output:
Array.prototype.join()
Or join() method joins all elements of an array into a string. It accepts a separator as an argument, but the default is already a comma ,
str = arr.join([separator = ','])
Examples:
var array = ['A', 'B', 'C'];
var myVar1 = array.join(); // 'A,B,C'
var myVar2 = array.join(', '); // 'A, B, C'
var myVar3 = array.join(' + '); // 'A + B + C'
var myVar4 = array.join(''); // 'ABC'
Do comment if you have any doubts or suggestions on this Js Array string topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version