Scroll-trigger Animation

Dynamic UI Trigger Intermediate Should Have

Hands-on

Interactive Sandbox

Static partial

Try this

  1. Open page
  2. Interact control
  3. Read result

Assert this

  • Visible elements
  • Text matches
  • Button state toggles

Animations / Scroll-trigger

Scroll-trigger Animation

Reveal cards with fade-in when they enter viewport.

${[1,2,3,4,5].map(i=>`
Card ${i}
`).join('')}
Idle

Learning & behavior

User flow

  1. Open page
  2. Interact control
  3. Read result

Learning objectives

  • Pick solid locators
  • Time waits
  • Assert state

Suggested assertions

  • Visible elements
  • Text matches
  • Button state toggles

Selector tips

Good

  • [data-test-id='scroll-trigger-animation-primary']
  • [data-test-id='scroll-trigger-animation-secondary']
  • [data-test-id='scroll-trigger-animation-action']
  • [aria-label='Scroll-trigger Animation']
  • getByRole('button', { name: 'Trigger' })

Fallback

  • section.scroll-trigger-animation-container :nth-of-type(1)
  • .card.scroll_trigger_animation button:nth-of-type(1)
  • form.scroll-trigger-animation-form .field-group:nth-child(1)

Avoid

  • .mt-4.mb-2.flex.items-center > input:nth-child(1)
  • .css-1a2b3c4
  • div[class*='temp-'][class*='hover']

Notes

  • Some parts delay render
  • Icon buttons need aria-label
  • Layout classes may shift
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