Checkbox

Checkboxes allow users to select multiple items from a list of individual items, or to mark one individual item as selected.

React

released

Vue

released

Elements

unsupported

Android

unsupported

iOS

unsupported

Example

Select brand:

FinnTori

Usage

Design Guidelines

See Figma: Warp - Components / Checkbox

Questions?

Feel free to ask any questions on usage in the Warp DS Slack channel: #nmp-warp-design-system

Frameworks

Import

The toggle component allows you to render checkboxes. All you have to do is specify type="checkbox" for the Toggle and let the component handle the rest. Toggle is built to handle both single and multiple options.

You must keep track of state yourself. The state has to be handled differently depending on whether you want to use single or multiple options. See examples below.

import { Toggle } from '@warp-ds/react';

Props

Optional Props

name	type	default	notes
type	"radio" |"checkbox" |"radio-button"		The type of Toggle
title	string		The option(s) title
invalid	boolean		Renders the field in an invalid state. Often paired together with helpText to provide feedback about the error.
helpText	string		Help text beneath options
options	ToggleEntry[]		An array of options to render
selected	ToggleEntry[]		An array of options to be selected / checked (controlled)
defaultSelected	ToggleEntry[]		An array of options to be selected / checked on mount (uncontrolled)
label	string		If you only need to render a single option, use this prop instead
noVisibleLabel	boolean		Whether label should be invisible
checked	boolean		Whether the single option should be checked (controlled)
defaultChecked	boolean		Whether the single option should be checked on mount (uncontrolled)
indeterminate	boolean		Whether a single option is indeterminate, or "partially checked." The checkbox will appear with a small dash instead of a tick to indicate that the option is not exactly checked or unchecked.
optional	boolean		Whether the toggle is optional Appends (optional) to the end of the title for indication
className	string		Custom classes applied to the wrapping container
equalWidth	boolean		Will make each option equal width, only applied when "radio-button" type is set
small	boolean		Whether the elements should be small, only applied when "radio-button" type is set

type ToggleEntry = {
  label: string;
  value: unknown;
};

Checkbox with single option

When you only want a single option, please use the label property over passing a single option to the options property. This results in the onChange callback function returning a single boolean value indicating the current state of the toggle.

function Example() {
  const [checked, setChecked] = React.useState(false);

  return (
    <>
      <p className="h4">{checked.toString()}</p>
      <Toggle
        type="checkbox"
        label="Apple"
        defaultChecked={checked}
        onChange={(checked) => setChecked(checked)}
      />
    </>
  );
}

Note the defaultChecked property, which is only used to set the default value on component mount (uncontrolled). It does not actively pass down the state of the checkbox. Feel free to omit this property if you are not setting the default value of the checkbox or use the checked property (controlled) to actively pass down state.

Note the onChange property returning a boolean value. This is because we're working with a single option. When using the options property, as seen in examples below, the option which has been selected is returned on the callback and we must handle this state ourselves.

Checkbox with multiple options

Let's have a look at using the Toggle with multiple options. As mentioned above, using the options property will change the returning value of the onChange callback. It will now return the option which was selected.

function Example() {
  const [selected, setSelected] = React.useState([
    { label: 'Microsoft', value: 'microsoft' },
  ]);

  const handleSelect = (entry) => {
    if (selected.some((e) => e.value === entry.value)) {
      return setSelected(selected.filter((s) => s.value !== entry.value));
    }

    return setSelected([...selected, entry]);
  };

  return (
    <>
      <p className="h4">{JSON.stringify(selected)}</p>
      <Toggle
        type="checkbox"
        title="Companies"
        defaultSelected={selected}
        options={[
          { label: 'Apple', value: 'apple' },
          { label: 'Microsoft', value: 'microsoft' },
        ]}
        onChange={handleSelect}
      />
    </>
  );
}

Note the defaultSelected property (uncontrolled). Similar to the single option checked property, this will render the passed options as checked by default when the component mounts. If you wish to actively pass the state down use the selected property instead (controlled).

Note the title property. This gives you the option to label the options, but is not required.

Checkbox with invisible label

You can hide the label by passing a noVisibleLabel prop to Toggle component.

function Example() {
  const [checked, setChecked] = React.useState('No');
  const answer = checked ? 'Yes' : 'No';

  return (
    <>
      <p className="h4">Is checkbox selected? {answer}</p>
      <Toggle
        type="checkbox"
        label={answer}
        defaultChecked={checked}
        onChange={(checked) => setChecked(checked)}
        noVisibleLabel
      />
    </>
  );
}

Checkbox with indeterminate state

Sometimes we need to indicate that the state of a single checkbox is indeterminate, or "partially checked". The checkbox will appear with a small dash instead of a tick to indicate that the option is not exactly checked or unchecked.

function Example() {
  const [selectAllChecked, setSelectAllChecked] = React.useState(false);
  const [selectedOptions, setSelectedOptions] = React.useState([
    { label: 'Apple pie', value: 'apple pie' },
    { label: 'Pavlova', value: 'pavlova' },
  ]);

  const options = [
    { label: 'Apple pie', value: 'apple pie' },
    { label: 'Carrot cake', value: 'carrot cake' },
    { label: 'Pavlova', value: 'pavlova' },
  ];

  const handleSelectAll = (checked) => {
    if (checked === false) {
      setSelectedOptions([]);
    } else {
      setSelectedOptions(options);
    }
    setSelectAllChecked(checked);
  };

  const handleSelect = (selected) => {
    let updatedSelected = selectedOptions;

    if (selectedOptions.some((option) => option.value === selected.value)) {
      updatedSelected = selectedOptions.filter(
        (option) => option.value !== selected.value,
      );
    } else {
      updatedSelected = [...selectedOptions, selected];
    }

    if (selectedOptions.length === options.length) setSelectAllChecked(false);
    if (updatedSelected.length === options.length) setSelectAllChecked(true);

    setSelectedOptions(updatedSelected);
  };

  return (
    <>
      <Toggle
        onChange={handleSelectAll}
        checked={selectAllChecked}
        type="checkbox"
        label="Select all desserts"
        indeterminate={
          selectedOptions.length > 0 &&
          selectedOptions.length !== options.length
        }
      />
      <Toggle
        title="Favourite desserts"
        type="checkbox"
        selected={selectedOptions}
        options={options}
        onChange={handleSelect}
      />
    </>
  );
}

Validation

Validation is as easy as passing the property invalid with a helpText to further explain the error. helpText can also be used as an assistance label before an error occurs as long as invalid is set to false.

function Example() {
  const [selected, setSelected] = React.useState([
    { label: 'Blue', value: 'blue' },
  ]);

  return (
    <Toggle
      type="checkbox"
      title="Favorite colors"
      helpText="Blue surely isn't amongst your favorites?"
      invalid
      selected={selected}
      options={[
        { label: 'Red', value: 'red' },
        { label: 'Blue', value: 'blue' },
        { label: 'Green', value: 'green' },
      ]}
    />
  );
}

In the next example, we'll take a closer look at one way to conditionally render error and help messages. You should probably take this a step further and implement your own error handler, but for the sake of the demo we've kept it quite simple.

function Example() {
  const [selected, setSelected] = React.useState([
    { label: 'Blue', value: 'blue' },
  ]);

  const handleSelect = (entry) => {
    if (selected.some((e) => e.value === entry.value)) {
      return setSelected(selected.filter((s) => s.value !== entry.value));
    }

    return setSelected([...selected, entry]);
  };

  return (
    <Toggle
      type="checkbox"
      title="Favorite colors"
      helpText={
        selected.some((e) => e.value === 'blue')
          ? "Blue surely isn't amongst your favorites?"
          : 'Choose your favorite colors'
      }
      invalid={!!selected.some((e) => e.value === 'blue')}
      selected={selected}
      onChange={handleSelect}
      options={[
        { label: 'Red', value: 'red' },
        { label: 'Blue', value: 'blue' },
        { label: 'Green', value: 'green' },
      ]}
    />
  );
}