Javascript Reference - JavaScript Array join() Method

The join() method accepts the string separator as the only argument and returns a string containing all items.

The default separator is comma (,).

Browser Support


`join()`	Yes	Yes	Yes	Yes	Yes

Syntax

array.join(separator)

Parameter Values

Optional separator used to separate the array element in the returned string.

If omitted, the elements are separated with a comma(,).

Return Value

It returns a String representing the array elements separated by the specified separator.

Example


var colors = ["red", "green", "blue"]; 
console.log(colors.join(",")); //red,green,blue 
console.log(colors.join("||")); //red||green||blue

The code above generates the following result.

Example 2

The following code shows how to use the default separator to join the elements in an array into a string.


<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">join</button>
<!--from w ww. j av  a 2s. c  o  m-->
<p id="demo"></p>

<script>
function myFunction() {
    var array1 = ["B", "A", "C", "M"];
    var x = document.getElementById("demo");
    x.innerHTML = array1.join();
}
</script>

</body>
</html>

The code above is rendered as follows: