JavaScript Replace
replace() returns a new string with the first match of the search value swapped out. Pass a plain string to replace one occurrence, or a regular expression with the /g flag to replace many.
Syntax
str.replace(search, replacement)Examples
| Input | Arguments | Output |
|---|---|---|
| "a-b-c" | "-", "+" | "a+b-c" |
| ↳ Only the first match is replaced. | ||
Gotchas
- A string search replaces only the first hit — use replaceAll or a /g regex for all.
Try it live
Type your input and see Replace transform it instantly.
Want to go further? Chain Replace with other functions in the visual Playground — pipe one output into the next and watch your data transform.