Rename refactor

In the previous "Multiple Cursors" exercise, we renamed a variable using multiple cursors. This is a bad idea. It is highly likely that you 1) won't get all instances of the variable and 2) it doesn't take care of instances in other files.

VS Code includes a powerful refactoring capability called "Rename". It allows you to rename a variable, method, class, ect and all references will be updated. Even if they are in another file.

Update the app class name

Exercise
Answer
Exercise
  • Export the App class from "app.js"

  • Create a new file called "main.js"

  • Import the App class and initialize it.

  • Rename the App class in "index.html" Application

Answer
  • Export the App class from the "app.js" file.

  • Create a new file called "main.js" in the "src" folder.

  • In the "main.js" file, import the App class and initialize it.

import App from "./app";
let app = new App();
  • Highlight the App class declaration in the "app.js" file

  • Press F2

  • Rename to Application

  • Notice that the reference in "main.js" is also updated

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Note that if you want to see all references in your project for a specific object, put your cursor on it and press Shift + F12.