Textarea

A textarea allows the users enter a multi-line, free-form text.

Props

Name	Type	Description	Default
defaultValue	`string`	Initial value of the textarea, only when it is uncontrolled.	-
value	`string`	Value of the textarea. If undefined, the component will be uncontrolled and the value will be managed internally.	-
label	`string`	Text to be placed above the textarea.	-
name	`string`	Name attribute of the textarea element.	-
helperText	`string`	Helper text to be placed above the textarea.	-
placeholder	`string`	Text to be put as placeholder of the textarea.	-
disabled	`boolean`	If true, the component will be disabled.	`false`
optional	`boolean`	If true, the textarea will be optional, showing '(Optional)' next to the label. Otherwise, the field will be considered required and an error will be passed as a parameter to the `onBlur` and `onChange` functions when it has not been filled.	`false`
readOnly	`boolean`	If true, the component will not be mutable, meaning the user can not edit the control.	`false`
verticalGrow	`'auto' \| 'manual' \| 'none'`	Defines the textarea's ability to resize vertically. It can be: 'auto': The textarea grows or shrinks automatically in order to fit the content. 'manual': The height of the textarea is enabled to be manually modified. 'none': The textarea has a fixed height and can't be modified.	`'auto'`
rows	`number`	Number of rows of the textarea.	`4`
onChange	`(val: { value: string; error?: string }) => void`	This function will be called when the user types within the textarea. An object including the current value and the error (if the value entered is not valid) will be passed to this function. If there is no error, `error` will not be defined.	-
onBlur	`(val: { value: string; error?: string }) => void`	This function will be called when the textarea loses the focus. An object including the textarea value and the error (if the value entered is not valid) will be passed to this function. If there is no error, `error` will not be defined.	-
error	`string`	If it is a defined value and also a truthy string, the component will change its appearance, showing the error below the textarea. If the defined value is an empty string, it will reserve a space below the component for a future error, but it would not change its look. In case of being undefined or null, both the appearance and the space for the error message would not be modified.	-
pattern	`string`	Regular expression that defines the valid format allowed by the textarea. This will be checked both when the textarea loses the focus and while typing within it. If the string entered does not match the pattern, the `onBlur` and `onChange` functions will be called with the current value and an internal error informing that this value does not match the pattern. If the pattern is met, the error parameter of both events will not be defined.	-
minLength	`number`	Specifies the minimum length allowed by the textarea. This will be checked both when the input element loses the focus and while typing within it. If the string entered does not comply the minimum length, the `onBlur` and `onChange` functions will be called with the current value and an internal error informing that the value length does not comply the specified range. If a valid length is reached, the error parameter of both events will not be defined.	-
maxLength	`number`	Specifies the maximum length allowed by the textarea. This will be checked both when the input element loses the focus and while typing within it. If the string entered does not comply the maximum length, the `onBlur` and `onChange` functions will be called with the current value and an internal error informing that the value length does not comply the specified range. If a valid length is reached, the error parameter of both events will not be defined.	-
autocomplete	`string`	HTML `autocomplete` attribute. Lets the user specify if any permission the user agent has to provide automated assistance in filling out the input value. Its value must be one of all the possible values of the HTML autocomplete attribute. See MDN for further information.	`'off'`
margin	`'xxsmall' \| 'xsmall' \| 'small' \| 'medium' \| 'large' \| 'xlarge' \| 'xxlarge' \| Margin`	Size of the margin to be applied to the component. You can pass an object with 'top', 'bottom', 'left' and 'right' properties in order to specify different margin sizes.	-
size	`'small' \| 'medium' \| 'large' \| 'fillParent'`	Size of the component.	`'medium'`
tabIndex	`number`	Value of the `tabindex` attribute.	`0`
ref	`React.Ref<HTMLDivElement>`	Reference to the component.	-

Examples

Controlled

() => {
  const [value, setValue] = useState("");
  const onChange = ({ value }) => {
    setValue(value);
  };
  const onBlur = ({ value }) => {
    setValue(value);
  };

  return (
    <DxcInset space="2rem">
      <DxcTextarea
        label="Comments"
        value={value}
        onChange={onChange}
        onBlur={onBlur}
      />
    </DxcInset>
  );
}

() => {
  const [value, setValue] = useState("");
  const onChange = ({ value }) => {
    setValue(value);
  };
  const onBlur = ({ value }) => {
    setValue(value);
  };

  return (
    <DxcInset space="2rem">
      <DxcTextarea
        label="Comments"
        value={value}
        onChange={onChange}
        onBlur={onBlur}
      />
    </DxcInset>
  );
}

Uncontrolled

() => {
  const inputRef = useRef();

  const handleSubmit = () => {
    const input = inputRef.current.getElementsByTagName("textarea")[0];
    console.log(input.value);
  };

  return (
    <DxcInset space="2rem">
      <DxcFlex direction="column" gap="2rem" alignItems="flex-start">
        <DxcTextarea
          label="Comments"
          defaultValue="My personal documents are attached."
          ref={inputRef}
        />
        <DxcButton label="Submit" onClick={handleSubmit}></DxcButton>
      </DxcFlex>
    </DxcInset>
  );
}

() => {
  const inputRef = useRef();

  const handleSubmit = () => {
    const input = inputRef.current.getElementsByTagName("textarea")[0];
    console.log(input.value);
  };

  return (
    <DxcInset space="2rem">
      <DxcFlex direction="column" gap="2rem" alignItems="flex-start">
        <DxcTextarea
          label="Comments"
          defaultValue="My personal documents are attached."
          ref={inputRef}
        />
        <DxcButton label="Submit" onClick={handleSubmit}></DxcButton>
      </DxcFlex>
    </DxcInset>
  );
}

Error handling

() => {
  const [value, setValue] = useState("");
  const [customPatternError, setCustomPatternError] = useState();
  const onChange = ({ value, error }) => {
    setValue(value);
    setCustomPatternError(
      error == undefined
        ? ""
        : "Error onChange: value does not comply the allowed format"
    );
  };
  const onBlur = ({ value, error }) => {
    setValue(value);
    setCustomPatternError(
      error == undefined
        ? ""
        : "Error onBlur: value does not comply the allowed format"
    );
  };

  return (
    <DxcInset space="2rem">
      <DxcTextarea
        label="Comments"
        value={value}
        onChange={onChange}
        onBlur={onBlur}
        pattern='^.*(?=.*[a-zA-Z])(?=.*)(?=.*[!&$%&? "]).*$'
        error={customPatternError}
      />
    </DxcInset>
  );
}

() => {
  const [value, setValue] = useState("");
  const [customPatternError, setCustomPatternError] = useState();
  const onChange = ({ value, error }) => {
    setValue(value);
    setCustomPatternError(
      error == undefined
        ? ""
        : "Error onChange: value does not comply the allowed format"
    );
  };
  const onBlur = ({ value, error }) => {
    setValue(value);
    setCustomPatternError(
      error == undefined
        ? ""
        : "Error onBlur: value does not comply the allowed format"
    );
  };

  return (
    <DxcInset space="2rem">
      <DxcTextarea
        label="Comments"
        value={value}
        onChange={onChange}
        onBlur={onBlur}
        pattern='^.*(?=.*[a-zA-Z])(?=.*)(?=.*[!&$%&? "]).*$'
        error={customPatternError}
      />
    </DxcInset>
  );
}

Props
Examples

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Textarea

Props

Examples

Controlled

Uncontrolled

Error handling

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