Web Reference: Jan 19, 2010 · No, there is no built-in support for building strings. You have to use concatenation instead. You can, of course, make an array of different parts of your string and then call join() on that array, but it then depends on how the join is implemented in the JavaScript interpreter you are using. Jul 27, 2020 · As a result, you cannot implement a StringBuilder efficiently in Javascript yet. I was able to improve the performance for 2^27 concatenations by using Rust’s String and connecting it to Javascript through WASM. Feb 3, 2024 · Whether you roll your own StringBuilder, grab a third-party library, or stick with the built-in language features, JavaScript’s got you covered for all your string-building adventures.
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