Get Started - Local Development Tutorial

This tutorial will walk you through testing, modifying, and debugging AltspaceVR web apps using a local development environment.

Note: We have suggested tools in this guide, but if you already are comfortable with another set of web development tools (other text editors, web servers, etc), feel free to substitute them. If you are used to using Webpack we have created a starter project to help you get started.

Launch an Example

  1. Create an AltspaceVR account then download and install the client for Windows or Mac.
  2. Clone or download the AltspaceSDK GitHub repo to a folder.
  3. Download the trial version of Prepros 5.0 developer web server (Windows, Mac) and import the AltspaceSDK folder.
    • Web servers like Prepros and live-server are convenient, easy to use (and also live-reload your changes!), but you’re free to use your favorite web development tools instead.
  4. Create a space for testing your app by visiting our event creation page in your desktop browser.
  5. Click on “Start a Quick Event”.
  6. Pick the “Conference Room” environment.
    • The “SDK Playground (empty) [BETA]” environment can be used to create apps that fill an entire space, but some of the examples may not work well there.
  7. Enter “http://localhost:7878” into the Public Enclosure URL field.
  8. Click “Create Event”.
  9. Click “Enter Now”.
  10. AltspaceVR should launch and you will be automatically placed in your testing space.
  11. The default URL of the enclosure is http://localhost:7878, so you should see the Prepros menu of active projects. Click on one of the AltspaceSDK example apps to try it out!

Make some tweaks

  1. Download and run Visual Studio Code or your favorite code editor.
  2. Drag your project folder into Visual Studio Code. You can browse through the project files in the sidebar.
  3. Open and edit the app you have launched in the client.
  4. Save the file, and Prepros should reload the app automatically with your new changes.

Inspect your app

  1. Install the Coherent Debugger, which is essentially a remote Chrome inspector for the AltspaceVR browser, by clicking the Debug button ().
  2. Start the debugger.
  3. Find and select the title of your app in the list
    • Note: It’s a good idea to use a recognizable title in your app, so that you can find it easily in the debugger
  4. Depending on the app, enter window.scene or window.sim.scene into the console to navigate through your three.js scene. You can also type altspace to explore the altspace.js APIs.


  1. Non-VR mode can be useful for testing. Simply start the client with your HMD disconnected or turned off or use the -disableVR command line flag.
  2. The client and your text editor can be docked side by side while in windowed mode.
    • Use shortcut keys to put the client into windowed mode, then move or snap it to the side of your screen. Mac: Left Command + Left ALT + W to toggle windowed mode, then move the window to a convenient location. Windows: Left CTRL + Left ALT + W to toggle windowed mode, then Windows + Right Arrow to snap window to the right
      • In Windows, if the window remains black you may need to snap or resize it a couple times for an image to appear
    • Alternatively, you can hold Shift or Option while clicking “Enter AltspaceVR” to configure resolution using the configuration window.
  3. If you are using a different web server, configure it to use http://localhost:7878 so that you don’t need to change the enclosure URL every time.
  4. Have fun and remember that you can always ask questions in our Slack chat group.