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. The concat() method of Array instances is used to merge two or more arrays. This method does not change the existing arrays, but instead returns a new array. Jan 17, 2026 · The concat () method is a built-in JavaScript function that combines multiple strings into one. While not as commonly used as the + operator or template literals, concat () is still a valid option, especially when you want a method-based approach.
YouTube Excerpt: In this video, the part 15 of my Array Methods Explained series, I simplified the
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