How to directly import an NPM module in Codepen (using unpkg)
NOTE: If you’re using this for your OWN package, please make sure you’re precompiling your NPM modules to a bundle first! Otherwise this won’t work.
Step 1: Create a pen
Step 2: Go to Settings -> JS

Step 3: Add an unpkg link as an external script with the following URL pattern: https://unpkg.com/<package-name>, then click “Save & Close”

Step 4: There is no step 4. You are DONE!