Frontend & browser·Loading, assets and the critical path
the text was invisible for a moment while the webfont loaded, then appeared all at once.
font-display
Also calledFOIT, FOUT, font swap
The descriptor controlling what the browser shows while a webfont is loading: nothing (a flash of invisible text), a fallback that is later swapped (a flash of unstyled text), or the fallback permanently. `swap` gets text on screen immediately at the cost of a visible reflow when the real font arrives. Matching the fallback's metrics to the webfont with size-adjust descriptors is what turns that reflow from a jolt into something barely noticeable.