<fusion-wc-textarea>

Storybook

Material Web Component

Installation

npm install @equinor/fusion-wc-textarea

Example Usage

<fwc-textarea label='My Label' icon="settings" rows='3' cols='4'></fwc-textarea>

Properties/Attributes

Name | Type | Description ------------------------- | ----------------------------- | ----------- value | string | The input control's value. type | TextInputType* | A string specifying the type of control to render. variant | TextInputVariant** | Input style variant to render. label | string | Sets floating label value. rows | number | Sets number of visible text lines. cols | number | Sets the visible width of the textarea. placeholder | string | Sets disappearing input placeholder. prefix | string | Prefix text to display before the input. suffix | string | Suffix text to display after the input. disabled | boolean | Whether or not the input should be disabled. charCounter | boolean | TextInputCharCounter*** | Note: requries maxLength to be set. Display character counter with max length. helper | string | Helper text to display below the input. Display default only when focused. helperPersistent | boolean | Always show the helper text despite focus. required | boolean | Displays error state if value is empty and input is blurred. maxLength | number | Maximum length to accept input. validationMessage | string | Message to show in the error color when the textarea is invalid. (Helper text will not be visible) pattern | string | HTMLInputElement.prototype.pattern (empty string will unset attribute) min | number|string | HTMLInputElement.prototype.min (empty string will unset attribute) max | number|string | HTMLInputElement.prototype.max (empty string will unset attribute) size | number|null | HTMLInputElement.prototype.size (null will unset attribute) step | number|null | HTMLInputElement.prototype.step (null will unset attribute) autoValidate | boolean | Reports validity on value change rather than only on blur. validity | ValidityState (readonly) | The ValidityState of the textarea. willValidate | boolean (readonly) | HTMLInputElement.prototype.willValidate validityTransform | ValidityTransform****|null | Callback called before each validation check. See the validation section for more details. validateOnInitialRender | boolean | Runs validation check on initial render. name | string | Sets the name attribute on the internal input.***

* TextInputType is exported by fwc-textinput.

type TextInputType = 'text'|'search'|'tel'|'url'|'email'|'password'|
    'date'|'month'|'week'|'time'|'datetime-local'|'number'|'color';

** TextInputVariant is exported by fwc-textinput.

export type TextInputVariant = 'filled' | 'outlined';

*** TextInputCharCounter is exported by fwc-textinput.

type TextInputCharCounter = 'external' | 'internal';

**** ValidityTransform is exported by fwc-textinput.

type ValidityTransform = (value: string, nativeValidity: ValidityState) => Partial<ValidityState>

***** The name property should only be used for browser autofill as webcomponent form participation does not currently consider the name attribute. See #289.

Methods

| Name | Description | -------- | ------------- | checkValidity() => boolean | Returns true if the textarea passes validity checks. Returns false and fires an invalid event on the textarea otherwise. NOTE: When accessing any property or function that checks validity at textarea initial boot up, you may have to await <fwc-textarea>.updateComplete. | reportValidity() => boolean | Runs checkValidity() method, and if it returns false, then it reports to the user that the input is invalid. | setCustomValidity(message:string) => void | Sets a custom validity message (also overwrites validationMessage). If this message is not the empty string, then the element is suffering from a custom validity error and does not validate. | layout() => Promise<void> | Re-calculate layout. If a textarea is styled with display:none before it is first rendered, and it has a label that is floating, then you must call layout() the first time you remove display:none, or else the notch surrounding the label will not render correctly.

Validation

<fwc-textarea> follows the basic <input> constraint validation model. It exposes:

• required
• maxLength
• pattern
• min
• max
• step
• validity
• willValidate
• checkValidity()
• reportValidity()
• setCustomValidity(message)

Additionally, it implements more features such as:

• validationMessage
• validateOnInitialRender
• and validityTransform

By default, <fwc-textarea> will report validation on blur.