Progressive Web Apps with React

Load

First, your application loads (let there be light!).

RAIL says that the optimal load time is one second (or less). That doesn't mean your entire application loads in one second; it means the user sees content within one second. They get some sense that the current task (loading the page) is progressing in a meaningful way, rather than staring at a blank white screen. As we'll see, this is easier said than done!