reform

This library provides a set of components to be used as building blocks for your form. It is a compilation of common form controls built on top of Formik with semantic HMTL and accessibility in mind while leaving styling up to you.

Usage

const reform = require('reform');

// TODO: DEMONSTRATE API

Components

<Checkbox />

Renders a checkbox with a label.

Props

• name: string — field name
• label?: React.ReactNode — checkbox label
• id?: string — sets id attribute for the checkbox as well as for attribute for the label. Defaults to name prop.
• labelClassName?: string — sets class name for the label.
• containerClassName?: string — sets class name for the wrapper <div /> containing the checkbox and the label.

Anything else you pass to <Checkbox /> will be applied to the <input /> element rendered by this component.

<CheckboxGroup />

A container component built on top of Formik's <FieldArray /> to be used to render a group of checkboxes.

Props

<CheckboxGroup /> accepts all props supported by <FieldArray /> component from Formik (e.g. render or component or children etc) as well as the following:

• label?: React.ReactNode — label for the group
• className?: string — sets class name for the group root element. NOTE: <CheckboxGroup /> renders a fieldset element for the sake of semantic HTML, which results in some styling caveats; see MDN docs on Fieldset for more details.
• labelClassName?: string — sets class name for the group label.

Example

import CheckboxGroup, { CheckboxItemSelectAll, CheckboxItem } from '@workpop/helium-reform/lib/CheckboxGroup';

const checkboxOptions = [
  {
    label: 'English',
    value: 'EN'
  },
  {
    label: 'French',
    value: 'FR'
  },
  {
    label: 'German',
    value: 'DE'
  },
];

function DemoCheckboxGroup() {
  const renderGroup = React.useCallback(
    (arrayHelpers: FieldArrayRenderProps) => {
      return (
        <React.Fragment>
          <CheckboxItemSelectAll
            options={checkboxOptions}
            arrayHelpers={arrayHelpers}
            label="Select All"
            name={arrayHelpers.name}
          />

          {checkboxOptions.map(({ value, label }) => {
            return (
              <CheckboxItem
                key={`${arrayHelpers.name}_${value}`}
                name={arrayHelpers.name}
                arrayHelpers={arrayHelpers}
                value={value}
                label={label}
              />
            );
          })}
        </React.Fragment>
      );
    },
    [checkboxOptions]
  );

  return (
    <CheckboxGroup
      name="testGroup"
      label="Languages"
      render={renderGroup}
    />
  );
}

Hooks

You don't have to use <CheckboxItem /> or <CheckboxItemSelectAll /> to render checkboxes inside a <CheckboxGroup />. If you want to implement your own checkbox components, you can use these hooks to get values and methods needed for a checkbox to work:

• useCheckboxInGroup — provides values to be passed to an <input type="checkbox" /> element.

  function MyCheckbox({
    value,
    arrayHelpers,
  }) {
      const checkbox = useCheckboxInGroup(value, arrayHelpers);
      // same as
      // const { name, value, checked, onChange } = useCheckboxInGroup(optionValue, arrayHelpers);
      
      return (
        <input type="checkbox" {...checkbox} />
      );
  }

• useSelectAll — provides values to be passed to an <input type="checkbox" /> element which would select/deselect all checkboxes on change.

  function MyCheckboxSelectAll({
    options,
    arrayHelpers,
  }) {
    const checkbox = useSelectAll(options, arrayHelpers);
  
    return (
      <input type="checkbox" value="all" {...checkbox} />
    );
  }

<CheckboxItem />

Unlike <Checkbox /> this component is not to be used on its own; its purpose is to render a checkbox belonging to a <CheckboxGroup />.

Props

• value: string — what value should the checkbox represent.
• label: React.ReactNode — checkbox label.
• arrayHelpers: FieldArrayRenderProps — API for working with the group values. This property is provided by <CheckboxGroup />. See Formik docs for more info on arrayHelpers.
• labelClassName?: string — sets class name for the checkbox label.
• containerClassName?: string — sets class name for the wrapper <div /> containing the checkbox and the label.

Anything else you pass to <CheckboxItem /> will be applied to the <input /> element rendered by this component.

<CheckboxItemSelectAll />

Similar to <CheckboxItem /> this component should be used only inside a <CheckboxGroup />. It renders a checkbox which will select or deselect all options in the group.

Props

• label: React.ReactNode — checkbox label.
• options: CheckboxOption[] — an array of objects describing each checkbox in the group.
• arrayHelpers: FieldArrayRenderProps — API for working with the group values. This property is provided by <CheckboxGroup />. See Formik docs for more info on arrayHelpers.
• labelClassName?: string — sets class name for the checkbox label.
• containerClassName?: string — sets class name for the wrapper <div /> containing the checkbox and the label.

Anything else you pass to <CheckboxItemSelectAll /> will be applied to the <input /> element rendered by this component.

<Input />

Renders an <input /> with a label.

Props

• name: string — field name
• label?: React.ReactNode — input label
• id?: string — sets id attribute for the input as well as for attribute for the label. Defaults to name prop.
• labelClassName?: string — sets class name for the label.

Anything else you pass to <Input /> will be applied to the <input /> element rendered by this component.

<Label />

A wrapper component around <label />; generally you won't need it unless you are writing your own form control.

Props

• children?: React.ReactNode
• htmlFor: string
• className?: string

<Radio />

Renders a single radio control. Usually makes sense only if used to build a radio group.

Props

• name: string — field name
• value: string — what value should the radio represent.
• label: React.ReactNode — radio label.
• id?: string — sets id attribute for the radio as well as for attribute for the label. Defaults to name prop.
• labelClassName?: string — sets class name for the radio label.
• containerClassName?: string — sets class name for the wrapper <div /> containing the radio and the label.

Anything else you pass to <Radio /> will be applied to the <input /> element rendered by this component.

<RadioGroup />

Renders a group of radio controls. Each radio option should be defined using this interface:

interface RadioOption {
  label: React.ReactNode; // radio label
  value: string; // radio value
}

Props

• name: string — field name
• label?: React.ReactNode — label for the group
• options: CheckboxOption[] — an array of objects describing each radio.
• className?: string — sets class name for the group root element. NOTE: <RadioGroup /> renders a fieldset element for the sake of semantic HTML, which results in some styling caveats; see MDN docs on Fieldset for more details.
• labelClassName?: string — sets class name for the group label.

<Select />

Renders a <select /> element. Each option should be defined using this interface:

interface SelectOption {
  label: string; // option label
  value: string; // option value
}

Props

• name: string — field name
• label?: React.ReactNode — checkbox label
• placeholder?: string — will insert an option which has empty value (value="") and placeholder as its label.
• id?: string — sets id attribute for the select as well as for attribute for the label. Defaults to name prop.
• className?: string — sets class name for the <select /> node.
• labelClassName?: string — sets class name for the label.

<TextArea />

Renders a text area.

Props

• name: string — field name
• label: React.ReactNode — text area label.
• id?: string — sets id attribute for the text area as well as for attribute for the label. Defaults to name prop.
• labelClassName?: string — sets class name for the text area label.

Anything else you pass to <TextArea /> will be applied to the <textarea /> element rendered by this component.