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. Jan 17, 2026 · String concatenation is the process of joining two or more strings into a single string. JavaScript provides simple and flexible ways to combine strings for display, logging, or data manipulation. Template literals are literals delimited with backtick (`) characters, allowing for multi-line strings, string interpolation with embedded expressions, and special constructs called tagged templates.
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