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Asked: 2026-05-29T11:06:55+00:00

I was looking at the js plugin of bootstrap,namely bootstrap-typeahead.js.I can’t figure out how

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I was looking at the js plugin of bootstrap,namely bootstrap-typeahead.js.I can’t figure out how element is selected.

$('body').on('focus.typeahead.data-api', '[data-provide="typeahead"]', function (e)

I know element is actually selected by the data-provide part,but when I look through jquery.js , I can’t figure out how it is done.From .on() part I went to event.add() part then I became more confused.Can anyone tell me how that’s done?

I know what it does,but want to know how.How element is selected?
I need more ideas here.

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1 Answer

  1. Editorial Team

    The first argument of the on() method is the event, in this case it is namespaced – the event is focus in the typeahead.data-api namespace

    The second argument is a filter-selector for event-delegation purposes. The actual event handler is attached to the body element, but the handler function is only executed for events coming from elements with the data-provide attribute with a value of typeahead

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