Animations

API

Arrays

Async

Basics

Challenges

Classes

Console

Dates

Debugging

DOM Elements

DOM Methods

DOM Navigation

DOM Properties

Event Listeners

Flow Control

Forms

Functions

Global Functions

JSON

Keywords

Libraries (3rd party)

Math

Modules

Objects

Snippets

String

Types

Widgets

Window Object

JavaScript - Replace

The replace() method returns a modified string where the pattern is replaced. Here's two examples of using replace(): one simple method and one a little more advanced using a regex pattern.


// example 1
let demo1 = document.getElementById("demo1");
let message = "Hello WoRld";
message = message.replace("WoRld", "World");
demo1.innerHTML = message;

// example 2
let demo2 = document.getElementById("demo2");
let expression = /world/i;
message = message.replace(expression, "Everybody!")
demo2.innerHTML = message;


Regular Expression Modifiers
Modifiers can be used to perform case-insensitive searches.

  • i - Perform case-insensitive matching
  • g - Perform a global match (find all matches rather than stopping after the first match)
  • m - Perform multiline matching