Textarea Auto-grow

Inputs & Widgets Textarea Intermediate Nice to Try

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

Inputs & Widgets / Textarea

Textarea Auto-grow

Expands with content, shows live line count, and enforces max height.

0 lines
Auto-expands up to 8 lines, then scrolls.
Try Enter spam and verify the height cap.

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='textarea-auto-grow-primary']
  • [data-test-id='textarea-auto-grow-secondary']
  • [data-test-id='textarea-auto-grow-action']
  • [aria-label='Textarea Auto-grow']
  • getByRole('button', { name: 'Textarea' })

Fallback

  • section.textarea-auto-grow-container :nth-of-type(1)
  • .card.textarea_auto_grow button:nth-of-type(1)
  • form.textarea-auto-grow-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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