Searches a string for a string value, or a regular expression, and returns a new string where some or all matches are replaced.


string.replace(searchValue, replacementValue);

If the searchValue is a string then only the first instance of the value will be replaced. To replace all instances, use the global (g) modifier on a regular expression.


Replace 'cats' with 'rats':

const weather = `It's raining cats and dogs!`;
const replaceCatsWithRats = weather.replace('cats', 'rats');
// Output: It's raining rats and dogs!

Find and replace multiple matches:

const kidsBook = 'Brown bear, brown bear, what do you see?';
const birdsNotBears = kidsBook.replace(/bear/g, 'bird');
// Output: Brown bird, brown bird, what do you see?

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