We will use Visual Studio Code as the IDE for building a React application with JavaScript. You can download and install Visual Studio Code from https://code.visualstudio.com/download.

Visual Studio Code is an awesome IDE for editing frontend applications. It is lightweight, easy to learn, and highly performant. You can open the React project we created in Visual Studio Code by using File > Open > Navigate to the react-todo-app folder. Visual Studio Code should open up as shown in the following screenshot (I've expanded the public and src folders to show their content):