We can use the replace string method to replace a string with another string in JavaScript.
Consider this string.
const greeting = "Hi, Friend";
Let's replace the string Hi to Hello.
const greeting = "Hi, Friend";
// replacing string Hi to Hello
greeting.replace("Hi", "Hello"); // Result: Hello, friend
- The method accepts the string to replace as the first argument.
- And the string to be replaced with as the second argument.
- It returns a string with the replaced string.
- The method also accepts Regular expression as the first argument.
- It is a string only method.
Using regular expression
We can also replace all the occurrences of a specific word in a string using a regular expression.
const favoriteLine = "Blue has 3 Blue bottles";
// all occurences of Blue will be replaced by Green
str.replace(/blue/gi, "Green"); // Result: Green has 3 Green bottles