You’ve Designed the Story, But How Does It Unfold?

Why designers need to understand performance, critical paths and what happens before information reaches the screen. The experience we design is only what happens on stage. Behind it, a whole system of dependencies determines when the performance can begin. Back in 2014, I wrote an article about why we put CSS in the head of an HTML document . It explored the browser’s critical rendering path, and how something as seemingly simple as putting CSS directly into a page rather than loading an external stylesheet could affect how quickly that page appeared. At the time, I was working primarily in f

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