VS Code Can Do That - Workshop
Main
Main
  • VS Code Can Do That Workshop
  • Essential Keyboard Shortcuts
  • Exercise 1 - Customizing The Editor
    • Customizing The Editor
    • Switch themes
    • Install a new icon theme
    • Switch fonts
    • Editor tweaks
    • Change default Settings view
    • Easily identify editor instances
  • Exercise 2 - Productivity Tricks
    • Productivity Tricks
    • Essential navigation shortcuts
    • Creating HTML with Emmet
    • Styling with Emmet
    • Update image sizes
  • Exercise 3 - Navigation And Refactoring
    • Navigation And Refactoring
    • Moving, Duplicating and Deleting
    • Folding sections
    • Multiple cursors
    • Rename refactor
    • Finding things
    • Extract refactor
  • Exercise 4 - Debugging
    • Debugging
    • Simple debugging
    • Simple launch config
    • Auto attach
    • Debugging browser apps
    • Compound debug configurations
  • Exercise 5 - Docker
    • Docker
    • Dockerizing an application
    • Running and inspecting images
    • Docker compose
    • Debugging Docker containers
  • Exercise 6 - Remote Development
    • Remote Development
    • Create a remote container
    • Create a new function in the container
    • Handling extensions
  • Exercise 7 - Working With Data
    • Working with data
    • Working with MongoDB
    • Working with SQLite
    • Working with MySQL
  • Exercise 8 - Git and Source Control
    • Git and source control
    • Cloning repos with VS Code
    • Common Git workflows
    • Branching and merge conflicts
Powered by GitBook
On this page

Was this helpful?

  1. Exercise 3 - Navigation And Refactoring

Extract refactor

PreviousFinding thingsNextDebugging

Last updated 5 years ago

Was this helpful?

It's common to realize that a certain block of code is going to be used in multiple places. When you realize that, you usually want to extract this code into it's own method. VS Code includes an "Extract Method" refactoring tool to make this easier.

Extract the code in the connection.on method inside the constructor into a method called updateColor

  • Open the "app.js" file

  • Highlight the code inside of the connection.on AFTER the "// update the bulb color" comment. Do not include the comment line.

// receives the "colorChanged" web socket event
connection.on("colorChanged", hex => {
  // update the bulb color
  bulb.style = `fill: #${hex};`;
  currentColor.textContent = `#${hex}`
});
  • Press Cmd/Ctrl + .

  • Select "Extract method in class "Application"

  • Name the method "updateColor"

  • Press Enter

  • Notice that the code has been extracted to a new method in the Application class called updateColor. Also notice that the variable hex was automatically included as a parameter.