SGDS Textarea Component Skill

<sgds-textarea> is a multi-line text input with built-in label, hint text, character limit feedback, resize control, spellcheck, and validation support.

Prerequisites

See sgds-components-setup for installation and framework integration (React 19+ vs React ≤18, Vue, Angular).

No CSS styling modifications — custom properties and CSS parts are not exposed on this component.

Quick Decision Guide

Set visible rows? → rows="4" (default is 4)

Limit character count? → maxlength="200" — displays a counter near the field

Prevent manual resize? → resize="none"

Auto-expand to content? → resize="auto"

Show validation feedback? → Set hasFeedback and invalidFeedback

<!-- Basic textarea -->
<sgds-textarea
  label="Comments"
  name="comments"
  hintText="Tell us more"
  placeholder="Enter your comments here"
  rows="4"
></sgds-textarea>

<!-- With character limit and validation -->
<sgds-textarea
  label="Description"
  name="description"
  maxlength="300"
  hasFeedback="both"
  invalidFeedback="Description must not be empty"
  required
></sgds-textarea>

<!-- Auto-resize, no vertical grip -->
<sgds-textarea
  label="Notes"
  name="notes"
  rows="2"
  resize="auto"
></sgds-textarea>

API Summary

<sgds-textarea>

Attribute	Type	Default	Purpose
label	string	""	Field label
hintText	string	""	Hint text shown below the label
name	string	—	Form field name for submission
value	string	""	Current value
defaultValue	string	—	Initial value
placeholder	string	"Placeholder"	Placeholder text
rows	number	4	Visible number of text lines
minlength	number	—	Minimum character length
maxlength	number	—	Maximum character length; shows counter when set
resize	none | vertical | auto	vertical	Controls textarea resize behaviour
inputmode	string	—	Virtual keyboard mode for mobile
autocorrect	boolean	false	Enables autocorrection
spellcheck	boolean	false	Enables spellcheck
hasFeedback	string	—	Controls validation UI; like <sgds-input>, supports "style", "text", "both"
invalidFeedback	string	""	Error message shown when invalid
invalid	boolean	—	Manually sets the invalid state
required	boolean	false	Makes the field required
disabled	boolean	false	Disables the textarea
readonly	boolean	false	Makes the textarea read-only
autofocus	boolean	false	Focuses the textarea on load

Events

Event	When
sgds-change	Committed value change
sgds-input	Each keystroke that changes the value
sgds-focus	Textarea gains focus
sgds-blur	Textarea loses focus

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For AI agents:

1. Setting maxlength automatically shows a character counter below the textarea.
2. resize="auto" makes the textarea grow vertically as the user types; resize="none" disables manual resizing.
3. Use hasFeedback="both" with invalidFeedback to show both the error border colour and the error message.
4. There are no public methods on this component.