ink-form

ink-form is a Node library for displaying a user-friendly form in a terminal window. It can be used in two ways, either by using the React Ink component Form exported by the package, or by using the imperative API openForm(options).

Example usage

npm install ink-form react ink
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const options = [
  { label: 'Opt 1', value: 'a' },
  { label: 'Opt 2', value: 'b' },
];

const form: FormProps = {
  form: {
    title: 'Form title',
    sections: [
      {
        title: 'Text and Number fields',
        fields: [
          { type: 'string', name: 'field1', label: 'Input with initial value', initialValue: 'Initial value' },
          { type: 'string', name: 'field2', label: 'Masked input', mask: '*' },
          { type: 'integer', name: 'field3', label: 'Integer between -5 and 8, stepsize 2', min: -5, max: 8, step: 2 },
          { type: 'float', name: 'field4', label: 'Float between 0 and 5, stepsize 0.1', min: 0, max: 5, step: 0.1 },
        ],
      },
      {
        title: 'Select and boolean fields',
        fields: [
          { type: 'select', name: 'field5', label: 'Select', options },
          { type: 'multiselect', name: 'field6', label: 'Multi Select', options },
          { type: 'boolean', name: 'field7', label: 'Boolean select', options },
        ],
      },
    ],
  },
};

// either:
(async () => {
  const result = await openForm(form);
  console.log(`Finished with value`, result);
})();

// or:
render(
  <Form
    {...form}
    onSubmit={result => {
      console.log(`Finished with value`, result);
    }}
  />
);
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If you want to see how using ink-form feels, you can clone this repo, run yarn to install dependencies and then run one of the demo scripts:

• yarn demo:overview (See Code)
• yarn demo:packagejson (See Code)
• yarn demo:custommanager (See Code)
• yarn demo:imperative (See Code)

Update Note

This package is now pure ESM as of 2.0.0. (Details: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c)

With that upgrade, I had to remove the multi select component as its dependency does not support ESM. Please use the v1x version branch with CJS if you need that.

Documentation

Detailed documentation is available at lukasbach.github.io/ink-form. Install the package with npm install ink-form --save or yarn add ink-form to your project.

Then, render the form by invoking the imperative interface or by rendering the React Ink component. Both take FormProps as parameters.

The most important property is the form-property, which dictates how the form fields are structured. It follows the FormStructure-interface. Look into the example above to see an example.

Custom fields

A form field describes a type of input, i.e. text input, number input etc. Included are:

• FormFieldString
• FormFieldInteger
• FormFieldFloat
• FormFieldSelect
• FormFieldMultiSelect
• FormFieldBoolean

You can add your own form field by extending AbstractFormField and implementing an associated FormFieldManager<CustomFormField>.