formik-semantic-ui

Wrappers for formik that simplify usage with semantic-ui-react.

Benefits:

• No need to manage form state
• handles onChange for you
• Normalize all input events to provide a value (Ex: value: true for Checkbox instead of checked
• Easily handle showing validation messages from client or server
• REDUCES BOILERPLATE

Install: npm i formik-semantic-ui

Ex:

<Form initialValues={{emailAddress:""}} onSubmit={(values, formikApi) => {
  api.save(values);
  formikApi.setFieldError('emailAdress', 'already in use')
}}>
  <Input label="Email" name="emailAddress" />

  <Button.Submit>Submit</Button.Submit>
  <Button.Reset>Cancel</Button.Reset>
</Form>

Demo:

• https://turner-industries.github.io/formik-semantic-ui/
• https://codesandbox.io/s/ywjoykw95x

Components

Input Components

• Input
• Dropdown
  • options can be passed to component directly or through inputProps
• Checkbox
• TextArea

props:

Property	Required	Default	Desc
name	required		formik property key checks touched, errors, and values
id	optional	field_input_${count}	used to override default id put on component and associated via label
label	optional	undefined	displays label on <Form.Field>
inputProps	optional	{}	props to be passed to matching Semantic-UI component. Ex: {type:"password"} on <Input />
fieldProps	optional	{}	props passed to <Form.Field />
errorComponent	optional	span with class sui-error-message	Use a component that receive a message prop (can be used also as a render prop)
inputRef	optional		ref function to get handle to dom element (does not work on DropDown)
fast	optional	false	whether to use formik's FastField (beneficial for large forms)

Produce Semantic-UI:

<Form.Field error={checks errors}>
  <label />
  <CONNECTED_FORMIK_COMPONENT /> /* Example <Input /> */
  <span className="sui-error-message">Some error message</span>
</Form.Field>

Form Helpers

<Form />

• Usage
  • Simple Usage - Components as children
  • Enhanced Usage - "Render Prop" similar to default Formik "Render Prop"
    • render={formikProps => <Form />}
    • function as a child
• Automatically binds Formik handleSubmit for Semantic UI Form onSubmit
• Automatically binds Formik isSubmitting for Semantic UI Form loading
• ignoreLoading - if you wish to disconnect the Forms loading prop from isSubmitting
• Accepts all <Formik /> props EXCEPT component
• Accepts the following props from Semantic UI <Form />
  • className
  • inverted
  • size

Ex:

<Form
  {...props}
  onSubmit={handleSubmit}
  loading={!props.ignoreLoading && isSubmitting}
/>

<Form.Children /> - alias for <React.Fragment> to better show intent when using render prop

Buttons

• Button - <Button {...props} type="button" />
• Button.Submit - <Button primary {...props} type="submit" />
• Button.Reset - <Button basic {...props} type="button" onClick={handleReset} />

Creating Custom Components

TODO: Create a better factory

Current:

• DatePicker
• FileUpload

Schema Driven

Basics

• Object keys map to component name prop
• Defaults to Input if type is unknown
• Unknown types pass their type to Input type={type}
• You can provide an initial value
• Very basic width via fieldProps

TODO:

• Document this better
• Handle grouping

Usage:

<Form
  onSubmit={this._handleSubmit}
  schema={{
    emailAddress: {
      label: 'Email Address',
      type: 'text',
      value: 'justinobney@gmail.com',
    },
    ssn: {
      label: 'SSN',
      type: 'password',
      fieldProps: {
        width: 8,
      },
    },
    notes: {
      label: 'Notes',
      type: 'textarea',
      inputProps: {
        rows: '6',
      },
    },
    likes: {
      label: 'Favorite Food',
      type: 'dropdown',
      options: [
        {text: 'Pizza', value: 'pizza'},
        {text: 'I am wrong', value: 'im-wrong'},
      ],
    },
    agree: {
      label: 'I Agree',
      type: 'checkbox',
    },
  }}
>
  <Button.Submit>Submit</Button.Submit>
  <Button.Reset>Cancel</Button.Reset>
</Form>