Input API - React Magma

Input fields are used in a number of ways for both collecting and displaying data from the user.

See also: Password Input, Search and Textarea.

Basic Usage

The label/input association will be handled via the passed in id if one is supplied or via an auto-generated id if not supplied.

Label text can be a string or a react node.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return (
    <>
      <Input labelText="Label" />
      <Input
        id="myCustomId"
        labelText={
          <span>
            Label <i>with node</i>
          </span>
        }
      />
    </>
  );
}

Number

import React from 'react';
import { Input, InputType } from 'react-magma-dom';
export function Example() {
  const [inputVal, setInputVal] = React.useState(1);
  const [hasError, setHasError] = React.useState(false);

  function handleChange(event) {
    setInputVal(event.target.value);
  }

  React.useEffect(() => {
    if (inputVal > 40 || inputVal < 1) {
      setHasError(true);
    } else {
      setHasError(false);
    }
  }, [inputVal]);

  return (
    <Input
      type={InputType.number}
      labelText="Number 1-40"
      inputWrapperStyle={{ width: '64px' }}
      errorMessage={hasError ? 'Please enter a number between 1 - 40' : null}
      helperMessage="Enter a number 1 - 40"
      min={1}
      max={40}
      value={inputVal}
      onChange={handleChange}
    />
  )
}

Disabled

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return <Input labelText="Disabled" disabled />;
}

Default Value

The defaultValue of an input can be set using the defaultValue prop.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return <Input labelText="Default value" defaultValue="default" />;
}

Value

The value of an input can be set using the value prop.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return <Input labelText="Value" value="abc123" />;
}

Clear Value

Setting isClearable on an input will add a button that clears the value of an input when clicked. The button will appear when the input has a value.

Additionally a prop onClear can be passed in which will be called when the input is cleared.

import React from 'react';
import { Input } from 'react-magma-dom';

export function Example() {
  return (
    <Input
      labelText="Value"
      onClear={() => console.log('input cleared...')}
      isClearable
    />
  );
}

Placeholder

The placeholder text of an input can be set using the placeholder prop. Placeholder text should be used to provide supplemental information about the input field. It should not be relied upon to take the place of the label text.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return <Input labelText="Email address" placeholder="yourname@example.com" />;
}

Helper Message

The helperMessage appears underneath the input field. It will not appear if an error message is present. Can be a node or a string.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  const helperMessage = (
    <>
      Helper text goes here. <a href="#">Learn more</a>
    </>
  );

  return <Input helperMessage={helperMessage} labelText="Helper message" />;
}

Error Message

If an input has an errorMessage, the input will be styled to highlight it's error state and the error message will appear below the input field. If an error message is present, it will replace the helper text. Can be a node or a string.

The required prop can be used to indicate when a field is required. It is also important to indicate to the user whenever a field is required.

While React Magma provides the error styling, it is up to the consumer app to handle the validation.

import React from 'react';
import { Input, Button, ButtonGroup, Spacer } from 'react-magma-dom';
export function Example() {
  const [hasError, setHasError] = React.useState(false);
  const [nameValue, setNameValue] = React.useState('');

  function submit() {
    if (nameValue === '') {
      setHasError(true);
    } else {
      setHasError(false);
    }
  }

  function reset() {
    setHasError(false);
    setNameValue('');
  }

  return (
    <>
      <Input
        errorMessage={hasError ? 'Please provide name' : null}
        helperMessage="* Required"
        labelText="Name *"
        onChange={event => setNameValue(event.target.value)}
        required
        value={nameValue}
      />
      <Spacer size="12" />
      <ButtonGroup>
        <Button onClick={submit}>Submit</Button>
        <Button onClick={reset} color="secondary">
          Reset
        </Button>
      </ButtonGroup>
    </>
  );
}

Character Counter

Character Counter is enabled when using the maxCount prop. As the user types past the allowable length, an error state appears showing the overrage.

import React from 'react';
import { Input } from 'react-magma-dom';

export function Example() {
  return <Input maxCount={4} labelText="Default Character Counter" />;
}

Input With Icon

An icon may be included with the input, by passing in the icon prop. An aria-label may be added using the iconAriaLabel prop.

Functionality can be added to the icon by using the onIconClick and onIconKeyDown props. All clickable input icons will appear on the right.

The iconPosition position prop is optional and takes the values left and right, with left being the default for non-clickable icons.

import React from 'react';
import { Input, InputType, Spinner } from 'react-magma-dom';
import { EventIcon, MailOutlineIcon } from 'react-magma-icons';
export function Example() {
  return (
    <>
      <Input
        labelText="Input with icon on left"
        icon={<MailOutlineIcon />}
        type={InputType.email}
      />

      <Input
        iconPosition="right"
        labelText="Input with icon on right"
        icon={<Spinner />}
        iconAriaLabel="Loading..."
      />

      <Input
        labelText="Input with clickable icon on right"
        iconAriaLabel="Calendar"
        onIconClick={() => {
          alert('Icon clicked');
        }}
        icon={<EventIcon />}
      />
    </>
  );
}

Input Size

The inputSize prop can be used to control the input size. Options are medium and large, with medium being the default.

import React from 'react';
import { Input, InputType } from 'react-magma-dom';
import { EventIcon, MailOutlineIcon } from 'react-magma-icons';
export function Example() {
  return (
    <>
      <Input
        labelText="Large input with icon on left"
        inputSize="large"
        icon={<MailOutlineIcon />}
        type={InputType.email}
      />

      <Input
        labelText="Large input with clickable icon on right"
        iconAriaLabel="Calendar"
        inputSize="large"
        onIconClick={() => {
          alert('Icon clicked');
        }}
        icon={<EventIcon />}
      />

      <Input
        errorMessage="Error"
        inputSize="large"
        labelText="Large input with error"
      />
    </>
  );
}

Inverse

isInverse is an optional boolean prop, that may be passed in when inputs are to be displayed on a dark background.

import React from 'react';
import { Card, CardBody, Input } from 'react-magma-dom';
export function Example() {
  return (
    <Card isInverse>
      <CardBody>
        <Input
          id="inputInverse"
          isInverse
          labelText="Inverse input"
          placeholder="Type in here"
        />

        <Input
          helperMessage="Helper text"
          isInverse
          labelText="Inverse input with helper text"
        />

        <Input
          errorMessage="Please fill out this field"
          isInverse
          labelText="Inverse input with error message"
          required
        />
      </CardBody>
    </Card>
  );
}

Input Label Position

When labelPosition is set to the value left, the input is moved inline with the label.

If multiple inputs are needed in a column display, labelWidth can be used which takes a number value to set a width for the label based in percentage. This helps to give a uniform appearance.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return (
    <>
      <Input labelText="Left aligned label" labelPosition="left" />
      <br />
      <Input labelText="Set width" labelPosition="left" labelWidth="25" />
      <br />
      <Input
        labelText="Additional set width label"
        labelPosition="left"
        labelWidth="25"
      />
    </>
  );
}

Input With Hidden Label

The isLabelVisuallyHidden prop can be used to visually hide the text label, while still making the text available to screen readers.

This option should only be used in rare instances, such as a search field. Providing a visual label is helpful for individuals with cognitive disabilities and users who have fine motor control limitations. When there isn't a visible label, the placeholder text should match the invisible label word for word. This is so speech input users can operate the control with voice commands.

import React from 'react';
import { Input } from 'react-magma-dom';
import { SearchIcon } from 'react-magma-icons';
export function Example() {
  return (
    <Input
      icon={<SearchIcon />}
      isLabelVisuallyHidden
      labelText="Search"
      placeholder="Search"
    />
  );
}

Additional Children (e.g. Help Link)

Some inputs require more content next to the form field, such as a help link to provide a bit of explanation to the user. If you pass children to the input field, it will render immediately after the input. The container is displayed flex, so the content will appear to the right of the field.

import React from 'react';
import { IconButton, Input, Tooltip, InputType } from 'react-magma-dom';
import { HelpIcon } from 'react-magma-icons';
export function Example() {
  const helpLinkLabel = 'Learn more';
  const onHelpLinkClick = () => {
    alert('Help link clicked!');
  };

  return (
    <Input labelText="Help link" iconPosition="top">
      <Tooltip content={helpLinkLabel}>
        <IconButton
          aria-label={helpLinkLabel}
          icon={<HelpIcon />}
          onClick={onHelpLinkClick}
          type={InputType.button}
          size="small"
          variant="link"
        />
      </Tooltip>
    </Input>
  );
}

Change Events

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  const [message, setMessage] = React.useState('');

  return (
    <div>
      <p>
        <strong>Changed Value: </strong>{' '}
        <span id="changedValue">{message}</span>
      </p>
      <Input
        labelText="Test value"
        value=""
        onChange={event => setMessage(event.target.value)}
      />
    </div>
  );
}

Focus Events

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  const [focused, setFocused] = React.useState(false);
  const [message, setMessage] = React.useState('');

  function changeFocusedMessage() {
    setFocused(prevFocused => {
      setMessage(!prevFocused ? 'Yes' : 'No');
      return !prevFocused;
    });
  }

  return (
    <div>
      <p>
        <strong>Focused: </strong> <span id="focused">{message}</span>
      </p>
      <Input
        id="inputFocused"
        labelText="Focused?"
        onFocus={changeFocusedMessage}
        onBlur={changeFocusedMessage}
      />
    </div>
  );
}

Forward Ref

Using React's forwardRef feature you can gain access to the reference of the internal input.

import React from 'react';
import { Button, Input, Spacer } from 'react-magma-dom';
export function Example() {
  const inputRef = React.useRef();

  return (
    <div>
      <Input ref={inputRef} labelText="Input to be focused" />
      <Spacer size="12" />
      <Button
        onClick={() => {
          inputRef.current.focus();
        }}
      >
        Click to focus input
      </Button>
    </div>
  );
}

Custom Styles

Custom styles can be passed into the Input component. The containerStyle property will apply to the container. Additional labelStyle, inputStyle and messageStyle properties are available to style the respective elements. Please use discretion when adding custom styles.

import React from 'react';
import { Input } from 'react-magma-dom';
export function Example() {
  return (
    <Input
      containerStyle={{ border: '1px dotted purple', padding: '5px' }}
      errorMessage="Styled error message"
      inputStyle={{ borderRadius: '0' }}
      labelStyle={{ color: 'brown', fontStyle: 'italic' }}
      labelText="Custom Styles for input"
      messageStyle={{ color: 'green' }}
    />
  );
}

Testing

Passing in the testId prop will add the data-testid attribute to the input element for easier querying in tests.

<input labelText="Label" testId="test-id" />

Input Props

This component uses forwardRef. The ref is applied to the input element.

All of the standard input attributes can be provided as props and will be applied to the input element that gets rendered.

containerStyle

Description

Style properties for the component container element

Type

React.CSSProperties

Default

defaultValue

Description

Default value for the form field

Type

string

Default

disabled

Description

If true, element is disabled

Type

boolean

Default

false

errorMessage

Description

Content of the error message. If a value is provided, the input will be styled as an error state and the error message will display.

Type

ReactNode

Default

helperMessage

Description

Content of the helper message.

Type

ReactNode

Default

icon

Description

Icon to display within the component

Type

React Element

Default

iconAriaLabel

Description

Text for the aria-label attribute for an icon, if provided

Type

string

Default

iconPosition

Description

Position within the component for the icon to appear

Type

enum, one of:
InputIconPosition.left
InputIconPosition.right

Default

right

inputSize

Description

Relative size of the component

Type

enum, one of:
InputSize.large
InputSize.medium

Default

medium

inputStyle

Description

Style properties for the input element

Type

React.CSSProperties

Default

inputWrapperStyle

Description

Style properties for input wrapper element

Type

React.CSSProperties

Default

isInverse

Description

If true, the component will have inverse styling to better appear on a dark background

Type

boolean

Default

false

isLabelVisuallyHidden

Description

If true, label text will be hidden visually, but will still be read by assistive technology

Type

boolean

Default

false

labelStyle

Description

Style properties for the label element

Type

React.CSSProperties

Default

labelText

Required

Description

Content for label; can be a node or a string

Type

ReactNode

Default

messageStyle

Description

Style properties for the helper or error message

Type

React.CSSProperties

Default

onIconClick

Description

Action that will fire when icon is clicked.

Type

function

Default

onIconKeyDown

Description

Action that will fire when icon receives keypress.

Type

function

Default

placeholder

Description

Text for input placeholder

Type

string

Default

required

Description

If true, the form field is required

Type

boolean

Default

false

type

Description

The type attribute of the form field

Type

enum, one of:
InputType.email
InputType.number
InputType.password
InputType.search
InputType.text

Default

text

value

Description

Value for the form field

Type

string

Default

Design

Components

Patterns

Input

Basic Usage

Number

Disabled

Default Value

Value

Clear Value

Placeholder

Helper Message

Error Message

Character Counter

Input With Icon

Input Size

Inverse

Input Label Position

Input With Hidden Label

Additional Children (e.g. Help Link)

Change Events

Focus Events

Forward Ref

Custom Styles

Testing

Input Props