JavaScript String concat()

Join two strings:

let text1 = "sea";
let text2 = "food";
let result = text1.concat(text2);

Join two strings:

let text1 = "Hello";
let text2 = "world!";
let result = text1.concat(" ", text2);

More examples below.

Description

The concat() method joins two or more strings.

The concat() method does not change the existing strings.

The concat() method returns a new string.

string.concat( string1, string2, ..., stringX)

Parameter	Description
string1, string2, ... stringX	Required. The strings to be joined.

Type	Description
A string	A new string containing the combined strings.

Join three strings:

let text1 = "Hello";
let text2 = "world!";
let text3 = "Have a nice day!";
let result = text1.concat(" ", text2, " ", text3);

concat() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes