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JavaScript Array join() Method

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  • Difficulty Level : Medium
  • Last Updated : 01 Dec, 2022
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The JavaScript Array join() Method is used to join the elements of an array into a string. The elements of the string will be separated by a specified separator and its default value is a comma(, ).

Syntax:

array.join(separator)

Parameters: This method accepts a single parameter as mentioned above and described below:

  • separator: It is Optional i.e, it can be either used as a parameter or not. Its default value is a comma(, ).

Example 1: In this example, the function join() joins together the elements of the array into a string using ‘|’.

JavaScript




<script>
    function func() {
        var a = [ 1, 2, 3, 4, 5, 6 ];
        console.log(a.join('|'));
    }
    func();
</script>

Output:

1|2|3|4|5|6

Example 2: In this example, the function join() joins together the elements of the array into a string using ‘, ‘ since it is the default value.

Javascript




<script>
    var a = [1, 2, 3, 4, 5, 6];
    console.log(a.join()); 
</script>

Output:

1, 2, 3, 4, 5, 6

Example 3: In this example, the function join() joins together the elements of the array into a string using ‘ ‘ (empty string).

Javascript




<script>
    var a = [1, 2, 3, 4, 5, 6];
    console.log(a.join(''));
</script>

Output:

123456

We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete reference article.

Supported Browsers: The browsers supported by JavaScript Array join() method are listed below:

  • Google Chrome 1.0 and above
  • Microsoft Edge 12 and above
  • Mozilla Firefox 1.0
  • Safari 1 and above
  • Opera 4 and above

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.


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