String.prototype.concat()

The concat() method combines the text of one or more strings and returns a new string.

Syntax

<var>str</var>.concat(<var>string2[</var>, <var>string3</var>, ..., <var>stringN</var>])

Parameters

string2...stringN

Strings to concatenate to this string.

Return value

A new string containing the combined text of the strings provided.

Description

The concat() function combines the text from one or more strings and returns a new string. Changes to the text in one string do not affect the other string.

Examples

Using concat()

The following example combines strings into a new string.

var hello = 'Hello, ';
console.log(hello.concat('Kevin', ' have a nice day.'));

/* Hello, Kevin have a nice day. */

Performance

It is strongly recommended that assignment operators (+, +=) are used instead of the concat() method. See this performance test.

Specifications

Browser compatibility

See also

• Array.prototype.concat()
• Assignment operators