npm package: @sachamarits/react-virtualized-select
Description: Drop-down menu for React with windowing to support large numbers of options.
Author: Brian Vaughn
Latest version: 3.1.4

### This component is no longer supported

Hello! This package is built on [react-virtualized](https://github.com/bvaughn/react-virtualized) (a library that I no longer support) and vesion 1.0 of [react-select](https://github.com/JedWatson/react-select)  (which is no longer the current version). As such, I've decided to stop supporting this package. GitHub issues and pull requests may be ignored.

If you are interested in taking over maintenance of this package, please send me an email (see my GitHub profile) and I'd be happy to add you as a collaborator.

# React Virtualized Select

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### Demos available here: http://bvaughn.github.io/react-virtualized-select/

![react-virtualized-select example](https://cloud.githubusercontent.com/assets/29597/14285960/46d733a6-fb02-11e5-884a-e349eb462704.gif)

## Getting started

Install `react-virtualized-select` using npm.

```shell
npm install react-virtualized-select --save
```

ES6, CommonJS, and UMD builds are available with each distribution.
For example:

```js
// Make sure to import default styles.
// This only needs to be done once; probably during bootstrapping process.
import 'react-select/dist/react-select.css'
import 'react-virtualized-select/styles.css'

// Then import the virtualized Select HOC
import VirtualizedSelect from 'react-virtualized-select'
```

Alternately you can load a global-friendly UMD build:

```html
<link rel="stylesheet" href="path-to-react-select/dist/react-select.css">
<link rel="stylesheet" href="path-to-react-virtualized/styles.css">
<link rel="stylesheet" href="path-to-react-virtualized-select/styles.css">

<script src="path-to-react-virtualized-select/dist/umd/react-virtualized-select.js"></script>
```

## Example

_react-select-virtualized_ works just like _react-select_. You pass it an array of options, along with almost any other parameters supported by the [`Select` component](https://github.com/JedWatson/react-select/#usage).

[Try this example in Code Sandbox.](https://codesandbox.io/s/91p80x10zp)

```js
// Import default styles.
// This only needs to be done once; probably during bootstrapping process.
import "react-select/dist/react-select.css";
import "react-virtualized-select/styles.css";

import React from "react";
import ReactDOM from "react-dom";
import Select from "react-virtualized-select";

// Dummy array of test values.
const options = Array.from(new Array(1000), (_, index) => ({
  label: `Item ${index}`,
  value: index
}));

ReactDOM.render(
  <Select options={options} />,
  document.getElementById("root")
);
```

## React Virtualized Select Props

The additional parameters introduced by _react-select-virtualized_ are optional. They are:

| Property | Type | Description |
|:---|:---|:---|
| async | `PropTypes.bool` | Use `Select.Async` internally; if this property is specified then a [`loadOptions`](https://github.com/JedWatson/react-select#async-options-with-promises) method should also be used. |
| maxHeight | `PropTypes.number` | Max height of options menu; defaults to 200 pixels. |
| optionHeight | `PropTypes.number` or `PropTypes.func` | Option height (defaults to 35 pixels). Dynamic height can be supported via a function with the signature `({ option: Object }): number` |
| optionRenderer | `PropTypes.func` | Custom option renderer; (see below for signature). |
| selectComponent | `PropTypes.func` | Use a specific select HOC (eg `Select`, `Select.Creatable`, `Select.Async` or `Select.AsyncCreatable`); defaults to `Select` (or `Select.Async` if `async` flag is true). |

### Unsupported props

`optionComponent` is not supported for _react-select-virtualized_; `optionRenderer` must be used instead, see below for usage.

## Custom Option Renderer

You can override the built-in option renderer by specifying your own `optionRenderer` property. Your renderer should return a React element that represents the specified option. It will be passed the following named parameters:

| Property | Type | Description |
|:---|:---|:---|
| focusedOption | `Object` | The option currently-focused in the dropdown. Use this property to determine if your rendered option should be highlighted or styled differently. |
| focusedOptionIndex | `number` | Index of the currently-focused option. |
| focusOption | `Function` | Callback to update the focused option; for example, you may want to call this function on mouse-over. |
| key | `string` | A unique identifier for each element created by the renderer. |
| labelKey | `string` | Attribute of option that contains the display text. |
| option | `Object` | The option to be rendered. |
| options | `Array<Object>` | Array of options (objects) contained in the select menu. |
| selectValue | `Function` | Callback to update the selected values; for example, you may want to call this function on click. |
| style | `Object` | Styles that must be passed to the rendered option. These styles are specifying the position of each option (required for correct option displaying in the dropdown).
| valueArray | `Array<Object>` | Array of the currently-selected options. Use this property to determine if your rendered option should be highlighted or styled differently. |
| valueKey | `string` | Attribute of option that contains the value. |

## optionRenderer example

It should be noted that in order to successfully set the active index in your custom renderer, you _need_ to call the `selectValue` prop. A common pattern is to bind onto your `onClick` handler in your custom element. The example that follows also provides the required `style` prop (as noted above), which is necessary to properly position the element. Refer to the  [full example](https://github.com/bvaughn/react-virtualized-select/blob/master/source/demo/Application.js) for the complete usage.

```jsx
function Option({
  style,
  option,
  selectValue,
}) {
  return (
    <a
      style={style}
      onClick={() => selectValue(option)}
    >
      {option.value}
    </a>
  );
}
```