Replace multiple strings with multiple other strings in JavaScript

In this article, we are given a Sentence having multiple strings. The task is to replace multiple strings with new strings simultaneously instead of doing it one by one, using javascript. Below are a few methods to understand:

Methods to Replace Multiple Strings with Multiple Other Strings:

• Using JavaScript replace() method
• Using JavaScript str.replaceAll() method

Method 1: JavaScript replace() method

This method searches a string for a defined value, or a regular expression, and returns a new string with the replaced defined value. 

Syntax: 

string.replace(searchVal, newvalue)

Example: This example uses the RegExp to replace the strings according to the object using the replace() method.

Javascript

let str = "I have a Lenovo Laptop, a Honor Phone, and a Samsung Tab.";
let Obj = {
    Lenovo: "Dell",
    Honor: "OnePlus",
    Samsung: "Lenovo"
};

function GFG_Fun() {
    console.log(str.replace(/Lenovo|Honor|Samsung/gi, function (matched) {
        return Obj[matched];
    }));
}
GFG_Fun()

Output

I have a Dell Laptop, a OnePlus Phone, and a Lenovo Tab.

Method 2: Using the JavaScript str.replaceAll() method

In this example, we will see the use of the JavaScript str.replaceAll() method for replacing multiple strings.

Javascript

const str = 'who.where_when-how';
const result = str
    .replaceAll('.', '?')
    .replaceAll('_', '?')
    .replaceAll('-', '?');

console.log(result);

Output

who?where?when?how