When I see a lot of messages coming in the console and it’s only warnings

When I am in charge of building the UI

When I realize there is a built-in function which could have save me an hour of coding

When production is down but I just quit my job

When I try to understand a new client’s request

When the functional tests successfully pass on first try

When I hear “JavaScript is like Java but for the web”

When users start using the app