Web Reference: 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. Jul 29, 2019 · There are 3 ways to concatenate strings in JavaScript. In this tutorial, you'll the different ways and the tradeoffs between them. The same + operator you use for adding two numbers can be used to concatenate two strings. You can also use +=, where a += b is a shorthand for a = a + b. Jul 10, 2025 · The concat() function concatenates the string arguments to the calling string and returns a new string. If the arguments are not of the type string, they are converted to string values before concatenating.
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