messageKey and targetKey are separate because the instruction is a
sentence and the target is the bare control label — the same label the
depiction paints, so the two can never name different controls. The sentences
live in Components.SafariInstallGuide; the control labels live with every
other OS control label in Components.AddToHomeScreenGuide.
One tap of a Safari install flow.
Remarks
messageKeyandtargetKeyare separate because the instruction is a sentence and the target is the bare control label — the same label the depiction paints, so the two can never name different controls. The sentences live inComponents.SafariInstallGuide; the control labels live with every other OS control label inComponents.AddToHomeScreenGuide.