add script load time script to readme, add .gitignore for testing file

[jhadev]

Might need another eye both with output and presentation but it works well for me.
Thanks,
Josh

Was going for this -
https://developer.mozilla.org/en-US/docs/Web/API/Resource_Timing_API/Using_the_Resource_Timing_API#timing_resource_loading_phases

[nucliweb]

Do you have a test script?
Perhaps it would be interesting to have a test script, right?

[jhadev]

I have a test script I use to stay organized before it goes into the readme, its full of comments of dead code or changes i wanted to revisit.

[nucliweb]

I can see that this PR change some code's syntax, we can add a linter rules to have the same rules when we ara working in this project. What do you think @jhadev?

[jhadev]

I can see that this PR change some code's syntax, we can add a linter rules to have the same rules when we ara working in this project. What do you think @jhadev?

Yes that was my fault. I used a different formatter by accident. The linter is up to you, I'm not sure what caused this. I always use prettier though.