wishthis/node_modules/fomantic-ui/examples/assets/show-examples.js

$(document)
    .ready(function () {
        // add popup to show name
        $('.ui:not(.container, .grid)').each(function () {
            $(this)
                .popup({
                    on: 'hover',
                    variation: 'small inverted',
                    exclusive: true,
                    content: $(this).attr('class'),
                })
            ;
        });
    })
;