Apica RUM implementation based on OTEL Browser SDK and Web Vitals

1. Build step

Need to use a build tool like parcel to get the final script

npx parcel build rum.js --dist-dir dist --no-source-maps

This can then be added to a page as below

This will launch auto instrumentation for the page and usage metrics will start ingestion

2. Manual instrumentation

Manual instrumentation is not currently supported, though this can be easily made available by exporting the internal instrumentation meters to client scripts

3. Code structure

At present entire script is in one file, in case the script grows the three signals (metrics, logs and traces) should be separated out to their own modules in separate files