JavaScript Array concat() Method
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JavaScript Array concat() Method
The concat() method is used to join two or more arrays.
Note: This method does not alter the existing arrays, but returns a new array, containing the values of the joined arrays.
Concatenating Two Arrays
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var set1 = ["One", "Two"];
var set2 = ["Three", "Four"];
var result = [];
// Concatenate two arrays
result = set1.concat(set2);
document.write(result);
</script>
</body>
</html>
Syntax
Array1.concat(array2, array3, ...., arrayN)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| array2..arrayN | Required | Arrays to concatenate into a new array. |
Concatenating More than Two Arrays
Note: Use comma-separator when joining more than two arrays.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var set1 = ["One", "Two"];
var set2 = ["Three", "Four"];
var set3 = ["Five", "Six"];
var result = [];
// Concatenate multiple arrays
result = set1.concat(set2, set3);
document.write(result);
</script>
</body>
</html>
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