Babel sandbox version comparison

[ianjennings]

From sandboxes created by wlawt: babel#2

Feature request for Sandbox.

The problem: is it useful to compare the output of babel between two different versions (i.e. 7.10.4 and 7.10.x)?

Outputs that we'd consider for this feature:

• comparing output for bugs
• code difference
• code size (for outputs)
• determine when a change was made
• making a history of how things have changed

Design spec:

1. Have an input box for the user
2. Have one output box for the babel version the PR was submitted in
3. Have another output box for another version of babel

• figure out npm alias
• be able to import 2 of the same pkgs with diff names
• figure out how to get 2 different outputs with the pkgs
• how'd we grab the version that's submitted in a PR (by default: it's latest version)
• how'd we support all the versions & load them quickly

UI Design:

• At the moment, it would be similar to what's available right now on sandboxes

Considerations:

• Version conflicts might come up with having 2 different versions of babel

[ianjennings]

From: https://hackmd.io/js_I3MpUR8GuSvv55DOnGw

Comparing output for bugs, code difference, code size, helping determine when I change was made, making a history of how things have changed.

• How do you even load 2 versions of something in the browser?
• https://unpkg.com/
• https://unpkg.com/browse/@babel/standalone@7.10.4/
• https://unpkg.com/@babel/standalone@7.10.4/,
  • load and then rename window.Babel?
• Visualizing output size based on version or options
• why is output larger/smaller?