jQuery·jQuery from selection to migration

Build a filter widget

Build a searchable card list with delegation, AJAX and accessible empty states.

Beginner 20 min read Lesson 10 of 300 Challenge included

What you will be able to do

Use delegation for dynamic cards.
Debounce the input.
Show loading, empty and error states.
Keep the count announced politely.

In plain English

The project combines selection, events, DOM updates and AJAX. Filter cards from an input, load more from an endpoint, handle empty and error states, and keep the markup accessible.

filter.jsJavaScript

let timer
$('#search').on('input', function () {
  clearTimeout(timer)
  const term = this.value.trim().toLowerCase()
  timer = setTimeout(() => {
    $('.card').each(function () {
      const text = $(this).text().toLowerCase()
      $(this).toggle(text.includes(term))
    })
    $('#count').text($('.card:visible').length + ' results')
  }, 200)
})

Your turn

Announce the count

Medium

Update a live region with the number of visible cards.

JAVASCRIPT · starter

$('#count').text()

Check your understanding before moving on.

Knowledge checkQuestion 1

Why debounce the search input?

Select an answer to continue

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Next: Drill 1: Summarise — Why jQuery exists

Lesson 10 of 300 · 0% of course