<sub>The terminal in all examples is <a href="https://hyper.is/">Hyper</a>, theme is <a href="https://github.com/jonschlinkert/hyper-monokai-extended">hyper-monokai-extended</a>.</sub><br><br>
<a href="#built-in-prompts"><strong>See more prompt examples</strong></a>
</p>
<br>
<br>
Created by [jonschlinkert](https://github.com/jonschlinkert) and [doowb](https://github.com/doowb), Enquirer is fast, easy to use, and lightweight enough for small projects, while also being powerful and customizable enough for the most advanced use cases.
* **Fast** - [Loads in ~4ms](#-performance) (that's about _3-4 times faster than a [single frame of a HD movie](http://www.endmemo.com/sconvert/framespersecondframespermillisecond.php) at 60fps_)
* **Lightweight** - Only one dependency, the excellent [ansi-colors](https://github.com/doowb/ansi-colors) by [Brian Woodward](https://github.com/doowb).
* **Easy to implement** - Uses promises and async/await and sensible defaults to make prompts easy to create and implement.
* **Easy to use** - Thrill your users with a better experience! Navigating around input and choices is a breeze. You can even create [quizzes](examples/fun/countdown.js), or [record](examples/fun/record.js) and [playback](examples/fun/play.js) key bindings to aid with tutorials and videos.
* **Intuitive** - Keypress combos are available to simplify usage.
* **Flexible** - All prompts can be used standalone or chained together.
* **Stylish** - Easily override semantic styles and symbols for any part of the prompt.
* **Extensible** - Easily create and use custom prompts by extending Enquirer's built-in [prompts](#-prompts).
* **Pluggable** - Add advanced features to Enquirer using plugins.
* **Validation** - Optionally validate user input with any prompt.
* **Well tested** - All prompts are well-tested, and tests are easy to create without having to use brittle, hacky solutions to spy on prompts or "inject" values.
* **Examples** - There are numerous [examples](examples) available to help you get started.
If you like Enquirer, please consider starring or tweeting about this project to show your support. Thanks!
<br>
<p align="center">
<b>>_ Ready to start making prompts your users will love? ▌</b><br>
<img src="https://raw.githubusercontent.com/enquirer/enquirer/master/media/heartbeat.gif" alt="Enquirer Select Prompt with heartbeat example" width="750">
</p>
<br>
<br>
## ❯ Getting started
Get started with Enquirer, the most powerful and easy-to-use Node.js library for creating interactive CLI prompts.
* [Install](#-install)
* [Usage](#-usage)
* [Enquirer](#-enquirer)
* [Prompts](#-prompts)
- [Built-in Prompts](#-prompts)
- [Custom Prompts](#-custom-prompts)
* [Key Bindings](#-key-bindings)
* [Options](#-options)
* [Release History](#-release-history)
* [Performance](#-performance)
* [About](#-about)
<br>
## ❯ Install
Install with [npm](https://www.npmjs.com/):
```sh
$ npm install enquirer --save
```
Install with [yarn](https://yarnpkg.com/en/):
```sh
$ yarn add enquirer
```
<p align="center">
<img src="https://raw.githubusercontent.com/enquirer/enquirer/master/media/npm-install.gif" alt="Install Enquirer with NPM" width="750">
</p>
_(Requires Node.js 8.6 or higher. Please let us know if you need support for an earlier version by creating an [issue](../../issues/new).)_
<br>
## ❯ Usage
### Single prompt
The easiest way to get started with enquirer is to pass a [question object](#prompt-options) to the `prompt` method.
Add Enquirer to your JavaScript project with following line of code.
```js
const Enquirer = require('enquirer');
```
The main export of this library is the `Enquirer` class, which has methods and features designed to simplify running prompts.
```js
const { prompt } = require('enquirer');
const question = [
{
type: 'input',
name: 'username',
message: 'What is your username?'
},
{
type: 'password',
name: 'password',
message: 'What is your password?'
}
];
let answers = await prompt(question);
console.log(answers);
```
**Prompts control how values are rendered and returned**
Each individual prompt is a class with special features and functionality for rendering the types of values you want to show users in the terminal, and subsequently returning the types of values you need to use in your application.
**How can I customize prompts?**
Below in this guide you will find information about creating [custom prompts](#-custom-prompts). For now, we'll focus on how to customize an existing prompt.
All of the individual [prompt classes](#built-in-prompts) in this library are exposed as static properties on Enquirer. This allows them to be used directly without using `enquirer.prompt()`.
Use this approach if you need to modify a prompt instance, or listen for events on the prompt.
**Example**
```js
const { Input } = require('enquirer');
const prompt = new Input({
name: 'username',
message: 'What is your username?'
});
prompt.run()
.then(answer => console.log('Username:', answer))
.catch(console.error);
```
### [Enquirer](index.js#L20)
Create an instance of `Enquirer`.
**Params**
* `options` **{Object}**: (optional) Options to use with all prompts.
* `answers` **{Object}**: (optional) Answers object to initialize with.
**Example**
```js
const Enquirer = require('enquirer');
const enquirer = new Enquirer();
```
### [register()](index.js#L42)
Register a custom prompt type.
**Params**
* `type` **{String}**
* `fn` **{Function|Prompt}**: `Prompt` class, or a function that returns a `Prompt` class.
* `returns` **{Object}**: Returns the Enquirer instance
Prompt function that takes a "question" object or array of question objects, and returns an object with responses from the user.
**Params**
* `questions` **{Array|Object}**: Options objects for one or more prompts to run.
* `returns` **{Promise}**: Promise that returns an "answers" object with the user's responses.
**Example**
```js
const Enquirer = require('enquirer');
const enquirer = new Enquirer();
const response = await enquirer.prompt({
type: 'input',
name: 'username',
message: 'What is your username?'
});
console.log(response);
```
### [use()](index.js#L160)
Use an enquirer plugin.
**Params**
* `plugin` **{Function}**: Plugin function that takes an instance of Enquirer.
* `returns` **{Object}**: Returns the Enquirer instance.
**Example**
```js
const Enquirer = require('enquirer');
const enquirer = new Enquirer();
const plugin = enquirer => {
// do stuff to enquire instance
};
enquirer.use(plugin);
```
### [Enquirer#prompt](index.js#L210)
Prompt function that takes a "question" object or array of question objects, and returns an object with responses from the user.
**Params**
* `questions` **{Array|Object}**: Options objects for one or more prompts to run.
* `returns` **{Promise}**: Promise that returns an "answers" object with the user's responses.
**Example**
```js
const { prompt } = require('enquirer');
const response = await prompt({
type: 'input',
name: 'username',
message: 'What is your username?'
});
console.log(response);
```
<br>
## ❯ Prompts
This section is about Enquirer's prompts: what they look like, how they work, how to run them, available options, and how to customize the prompts or create your own prompt concept.
**Getting started with Enquirer's prompts**
* [Prompt](#prompt) - The base `Prompt` class used by other prompts
- [Prompt Options](#prompt-options)
* [Built-in prompts](#built-in-prompts)
* [Prompt Types](#prompt-types) - The base `Prompt` class used by other prompts
* [Custom prompts](#%E2%9D%AF-custom-prompts) - Enquirer 2.0 introduced the concept of prompt "types", with the goal of making custom prompts easier than ever to create and use.
### Prompt
The base `Prompt` class is used to create all other prompts.
```js
const { Prompt } = require('enquirer');
class MyCustomPrompt extends Prompt {}
```
See the documentation for [creating custom prompts](#-custom-prompts) to learn more about how this works.
#### Prompt Options
Each prompt takes an options object (aka "question" object), that implements the following interface:
```js
{
// required
type: string | function,
name: string | function,
message: string | function | async function,
// optional
skip: boolean | function | async function,
initial: string | function | async function,
format: function | async function,
result: function | async function,
validate: function | async function,
}
```
Each property of the options object is described below:
| `type` | yes | `string\|function` | Enquirer uses this value to determine the type of prompt to run, but it's optional when prompts are run directly. |
| `name` | yes | `string\|function` | Used as the key for the answer on the returned values (answers) object. |
| `message` | yes | `string\|function` | The message to display when the prompt is rendered in the terminal. |
| `skip` | no | `boolean\|function` | If `true` it will not ask that prompt. |
| `initial` | no | `string\|function` | The default value to return if the user does not supply a value. |
| `format` | no | `function` | Function to format user input in the terminal. |
| `result` | no | `function` | Function to format the final submitted value before it's returned. |
| `validate` | no | `function` | Function to validate the submitted value before it's returned. This function may return a boolean or a string. If a string is returned it will be used as the validation error message. |
**Example usage**
```js
const { prompt } = require('enquirer');
const question = {
type: 'input',
name: 'username',
message: 'What is your username?'
};
prompt(question)
.then(answer => console.log('Answer:', answer))
.catch(console.error);
```
<br>
### Built-in prompts
* [AutoComplete Prompt](#autocomplete-prompt)
* [BasicAuth Prompt](#basicauth-prompt)
* [Confirm Prompt](#confirm-prompt)
* [Form Prompt](#form-prompt)
* [Input Prompt](#input-prompt)
* [Invisible Prompt](#invisible-prompt)
* [List Prompt](#list-prompt)
* [MultiSelect Prompt](#multiselect-prompt)
* [Numeral Prompt](#numeral-prompt)
* [Password Prompt](#password-prompt)
* [Quiz Prompt](#quiz-prompt)
* [Survey Prompt](#survey-prompt)
* [Scale Prompt](#scale-prompt)
* [Select Prompt](#select-prompt)
* [Sort Prompt](#sort-prompt)
* [Snippet Prompt](#snippet-prompt)
* [Toggle Prompt](#toggle-prompt)
### AutoComplete Prompt
Prompt that auto-completes as the user types, and returns the selected value as a string.
| `highlight` | `function` | `dim` version of primary style | The color to use when "highlighting" characters in the list that match user input. |
| `multiple` | `boolean` | `false` | Allow multiple choices to be selected. |
| `suggest` | `function` | Greedy match, returns true if choice message contains input string. | Function that filters choices. Takes user input and a choices array, and returns a list of matching choices. |
| `initial` | `number` | 0 | Preselected item in the list of choices. |
| `footer` | `function` | None | Function that displays [footer text](https://github.com/enquirer/enquirer/blob/6c2819518a1e2ed284242a99a685655fbaabfa28/examples/autocomplete/option-footer.js#L10) |
**Related prompts**
* [Select](#select-prompt)
* [MultiSelect](#multiselect-prompt)
* [Survey](#survey-prompt)
**↑ back to:** [Getting Started](#-getting-started) · [Prompts](#-prompts)
***
### BasicAuth Prompt
Prompt that asks for username and password to authenticate the user. The default implementation of `authenticate` function in `BasicAuth` prompt is to compare the username and password with the values supplied while running the prompt. The implementer is expected to override the `authenticate` function with a custom logic such as making an API request to a server to authenticate the username and password entered and expect a token back.
You can use [data-store](https://github.com/jonschlinkert/data-store) to store [input history](https://github.com/enquirer/enquirer/blob/master/examples/input/option-history.js) that the user can cycle through (see [source](https://github.com/enquirer/enquirer/blob/8407dc3579123df5e6e20215078e33bb605b0c37/lib/prompts/input.js)).
**Related prompts**
* [Confirm](#confirm-prompt)
* [Numeral](#numeral-prompt)
* [Password](#password-prompt)
**↑ back to:** [Getting Started](#-getting-started) · [Prompts](#-prompts)
***
### Invisible Prompt
Prompt that takes user input, hides it from the terminal, and returns a string.
Optionally, pass a `result` function and use the `.map` method to return an object of key-value pairs of the selected names and values: [example](./examples/multiselect/option-result.js)
message: 'The website makes it easy to upload images.'
},
{
name: 'colors',
message: 'The website has a pleasing color palette.'
}
]
});
prompt.run()
.then(value => console.log('ANSWERS:', value))
.catch(console.error);
```
**Related prompts**
* [Scale](#scale-prompt)
* [Snippet](#snippet-prompt)
* [Select](#select-prompt)
***
### Scale Prompt
A more compact version of the [Survey prompt](#survey-prompt), the Scale prompt allows the user to quickly provide feedback using a [Likert Scale](https://en.wikipedia.org/wiki/Likert_scale).
**↑ back to:** [Getting Started](#-getting-started) · [Prompts](#-prompts)
***
### Sort Prompt
Prompt that allows the user to sort items in a list.
**Example**
In this [example](https://github.com/enquirer/enquirer/raw/master/examples/sort/prompt.js), custom styling is applied to the returned values to make it easier to see what's happening.
**↑ back to:** [Getting Started](#-getting-started) · [Prompts](#-prompts)
***
### Prompt Types
There are 5 (soon to be 6!) type classes:
* [ArrayPrompt](#arrayprompt)
- [Options](#options)
- [Properties](#properties)
- [Methods](#methods)
- [Choices](#choices)
- [Defining choices](#defining-choices)
- [Choice properties](#choice-properties)
- [Related prompts](#related-prompts)
* [AuthPrompt](#authprompt)
* [BooleanPrompt](#booleanprompt)
* DatePrompt (Coming Soon!)
* [NumberPrompt](#numberprompt)
* [StringPrompt](#stringprompt)
Each type is a low-level class that may be used as a starting point for creating higher level prompts. Continue reading to learn how.
### ArrayPrompt
The `ArrayPrompt` class is used for creating prompts that display a list of choices in the terminal. For example, Enquirer uses this class as the basis for the [Select](#select) and [Survey](#survey) prompts.
#### Options
In addition to the [options](#options) available to all prompts, Array prompts also support the following options.
| `autofocus` | `no` | `string\|number` | The index or name of the choice that should have focus when the prompt loads. Only one choice may have focus at a time. | |
| `stdin` | `no` | `stream` | The input stream to use for emitting keypress events. Defaults to `process.stdin`. |
| `stdout` | `no` | `stream` | The output stream to use for writing the prompt to the terminal. Defaults to `process.stdout`. |
| |
#### Properties
Array prompts have the following instance properties and getters.
| `choices` | `array` | Array of choices that have been normalized from choices passed on the prompt options. |
| `cursor` | `number` | Position of the cursor relative to the _user input (string)_. |
| `enabled` | `array` | Returns an array of enabled choices. |
| `focused` | `array` | Returns the currently selected choice in the visible list of choices. This is similar to the concept of focus in HTML and CSS. Focused choices are always visible (on-screen). When a list of choices is longer than the list of visible choices, and an off-screen choice is _focused_, the list will scroll to the focused choice and re-render. |
| `focused` | Gets the currently selected choice. Equivalent to `prompt.choices[prompt.index]`. |
| `index` | `number` | Position of the pointer in the _visible list (array) of choices_. |
| `limit` | `number` | The number of choices to display on-screen. |
| `selected` | `array` | Either a list of enabled choices (when `options.multiple` is true) or the currently focused choice. |
| `pointer()` | Returns the visual symbol to use to identify the choice that currently has focus. The `❯` symbol is often used for this. The pointer is not always visible, as with the `autocomplete` prompt. |
| `indicator()` | Returns the visual symbol that indicates whether or not a choice is checked/enabled. |
| `focus()` | Sets focus on a choice, if it can be focused. |
#### Choices
Array prompts support the `choices` option, which is the array of choices users will be able to select from when rendered in the terminal.
| `name` | `string` | The unique key to identify a choice |
| `message` | `string` | The message to display in the terminal. `name` is used when this is undefined. |
| `value` | `string` | Value to associate with the choice. Useful for creating key-value pairs from user choices. `name` is used when this is undefined. |
| `choices` | `array` | Array of "child" choices. |
| `hint` | `string` | Help message to display next to a choice. |
| `role` | `string` | Determines how the choice will be displayed. Currently the only role supported is `separator`. Additional roles may be added in the future (like `heading`, etc). Please create a [feature request] |
| `enabled` | `boolean` | Enabled a choice by default. This is only supported when `options.multiple` is true or on prompts that support multiple choices, like [MultiSelect](#-multiselect). |
| `disabled` | `boolean\|string` | Disable a choice so that it cannot be selected. This value may either be `true`, `false`, or a message to display. |
| `indicator` | `string\|function` | Custom indicator to render for a choice (like a check or radio button). |
#### Related prompts
* [AutoComplete](#autocomplete-prompt)
* [Form](#form-prompt)
* [MultiSelect](#multiselect-prompt)
* [Select](#select-prompt)
* [Survey](#survey-prompt)
***
### AuthPrompt
The `AuthPrompt` is used to create prompts to log in user using any authentication method. For example, Enquirer uses this class as the basis for the [BasicAuth Prompt](#basicauth-prompt). You can also find prompt examples in `examples/auth/` folder that utilizes `AuthPrompt` to create OAuth based authentication prompt or a prompt that authenticates using time-based OTP, among others.
`AuthPrompt` has a factory function that creates an instance of `AuthPrompt` class and it expects an `authenticate` function, as an argument, which overrides the `authenticate` function of the `AuthPrompt` class.
| `authenticate()` | Contain all the authentication logic. This function should be overridden to implement custom authentication logic. The default `authenticate` function throws an error if no other function is provided. |
#### Choices
Auth prompt supports the `choices` option, which is the similar to the choices used in [Form Prompt](#form-prompt).
**Example**
```js
const { AuthPrompt } = require('enquirer');
function authenticate(value, state) {
if (value.username === this.options.username && value.password === this.options.password) {
// Use the prompt by creating an instance of your custom prompt class.
const prompt = new HaiKarate({
message: 'How many sprays do you want?',
initial: 10
});
prompt.run()
.then(answer => console.log('Sprays:', answer))
.catch(console.error);
```
If you want to be able to specify your prompt by `type` so that it may be used alongside other prompts, you will need to first create an instance of `Enquirer`.
```js
const Enquirer = require('enquirer');
const enquirer = new Enquirer();
```
Then use the `.register()` method to add your custom prompt.
```js
enquirer.register('haikarate', HaiKarate);
```
Now you can do the following when defining "questions".
| <kbd>ctrl</kbd> + <kbd>c</kbd> | Cancel the prompt. |
| <kbd>ctrl</kbd> + <kbd>g</kbd> | Reset the prompt to its initial state. |
<br>
### Move cursor
These combinations may be used on prompts that support user input (eg. [input prompt](#input-prompt), [password prompt](#password-prompt), and [invisible prompt](#invisible-prompt)).
| <kbd>left</kbd> | Move the cursor back one character. |
| <kbd>right</kbd> | Move the cursor forward one character. |
| <kbd>ctrl</kbd> + <kbd>a</kbd> | Move cursor to the start of the line |
| <kbd>ctrl</kbd> + <kbd>e</kbd> | Move cursor to the end of the line |
| <kbd>ctrl</kbd> + <kbd>b</kbd> | Move cursor back one character |
| <kbd>ctrl</kbd> + <kbd>f</kbd> | Move cursor forward one character |
| <kbd>ctrl</kbd> + <kbd>x</kbd> | Toggle between first and cursor position |
<br>
### Edit Input
These key combinations may be used on prompts that support user input (eg. [input prompt](#input-prompt), [password prompt](#password-prompt), and [invisible prompt](#invisible-prompt)).
| <kbd>delete</kbd> | <kbd>backspace</kbd> | Delete one character to the left. |
| <kbd>fn</kbd> + <kbd>delete</kbd> | <kbd>delete</kbd> | Delete one character to the right. |
| <kbd>option</kbd> + <kbd>up</kbd> | <kbd>alt</kbd> + <kbd>up</kbd> | Scroll to the previous item in history ([Input prompt](#input-prompt) only, when [history is enabled](examples/input/option-history.js)). |
| <kbd>option</kbd> + <kbd>down</kbd> | <kbd>alt</kbd> + <kbd>down</kbd> | Scroll to the next item in history ([Input prompt](#input-prompt) only, when [history is enabled](examples/input/option-history.js)). |
### Select choices
These key combinations may be used on prompts that support _multiple_ choices, such as the [multiselect prompt](#multiselect-prompt), or the [select prompt](#select-prompt) when the `multiple` options is true.
| <kbd>fn</kbd> + <kbd>left</kbd> | <kbd>home</kbd> | Move the pointer to the first choice in the choices array. |
| <kbd>fn</kbd> + <kbd>right</kbd> | <kbd>end</kbd> | Move the pointer to the last choice in the choices array. |
<br>
## ❯ Release History
Please see [CHANGELOG.md](CHANGELOG.md).
## ❯ Performance
### System specs
MacBook Pro, Intel Core i7, 2.5 GHz, 16 GB.
### Load time
Time it takes for the module to load the first time (average of 3 runs):
```
enquirer: 4.013ms
inquirer: 286.717ms
```
<br>
## ❯ About
<details>
<summary><strong>Contributing</strong></summary>
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
### Todo
We're currently working on documentation for the following items. Please star and watch the repository for updates!
* [ ] Customizing symbols
* [ ] Customizing styles (palette)
* [ ] Customizing rendered input
* [ ] Customizing returned values
* [ ] Customizing key bindings
* [ ] Question validation
* [ ] Choice validation
* [ ] Skipping questions
* [ ] Async choices
* [ ] Async timers: loaders, spinners and other animations
* [ ] Links to examples
</details>
<details>
<summary><strong>Running Tests</strong></summary>
Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
```sh
$ npm install && npm test
```
```sh
$ yarn && yarn test
```
</details>
<details>
<summary><strong>Building docs</strong></summary>
_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
To generate the readme, run the following command:
Thanks to [derhuerst](https://github.com/derhuerst), creator of prompt libraries such as [prompt-skeleton](https://github.com/derhuerst/prompt-skeleton), which influenced some of the concepts we used in our prompts.