Web Reference: If you want to replace multiple characters you can call the String.prototype.replace() with the replacement argument being a function that gets called for each match. All you need is an object representing the character mapping that you will use in that function. Jul 23, 2025 · Here are the various methods to replace multiple characters in a string in JavaScript. 1. Using replace () Method with Regular Expression The replace () method with a regular expression is a simple and efficient way to replace multiple characters. const s1 = "hello world!"; The most concise and performant way to replace multiple, different characters is to use a single regular expression that contains a character set ([...]). This allows you to define a group of characters to match in a single pass.
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