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Implementing the “one or more” UI component


I wanted to try this for years. In Tog on Interface, Tog designs a picker for selecting one or more options, but not none. Think langua...

If deselecting would leave none selected, auto-select the next option. It was inspired a drop of mercury, which pops sideways when you poke it. What better to do this fine day than implement a fabled UI component?

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UI component