Tree select

A select that allows the user to choose multiple options from a tree of options.

Usage

Install with npm and import as a named import using the syntax of your choice:

``js
import { TreeSelect } from 'tree-select';
var TreeSelect = require('tree-select').TreeSelect;
`

There are three required props on the component: data, the actual contents of the tree; and onChange and value to control the contents. This is the simplest usage of the component:

`jsx
data={data}
onChange={value => this.setState({ value: value })}
value={this.state.value}
/>
`

$3

The shape of data is a list of items with fields name and children:

`js
[
{ name: "Kitchen", children: [
{ name: "Dishwashing machine" },
{ name: "Teapot" }
] },
{ name: "Living room", children: [
{ name: "Sofa" },
{ name: "Chairs", children: [ { name: "Green chair" }, { name: "Blue char" } ] }
] }
]
`

Optional fields on data objects:

- id. A freeform field for your own tracking purposes.
- reactKey. A string to uniquely identify the object amongst its siblings in case you modify data on the fly. Without it, the performance of modifying data will suffer. More in React docs.
- selectable. A corner-case feature where you can select some items as non-selectable. A scenario where a selectable parent contains non-selectable children is at the moment not supported.

$3

The component is only available as a controlled component. This means you need to store the current value and update the component in response to a change event.

The value you provide in value and receive in onChange is a flat array of objects from data.

Options

Use required to make the component trigger the native error box and prevent the ancestor form from submitting:

`ts
required
/>
`

Styling

Default looks on the dropdown are purposefully spartan. You should customize that using CSS and content replacements. There is also some work to improve sticky sections.

$3

Style using CSS in accordance to your application using the ability to set custom class names on components:

`jsx
filterBox: '',
filterInput: '',
topContainer: '',
tree: '',
treeBranch: '',
treeCheckbox: '',
treeItem: '',
treeItemLabel: '',
valueBox: '',
valueBoxActive: '',
valueButton: '',
valueItem: '',
}} />
`

In addition, there are some data attributes that can narrow the styles down:

* data-level on a treeItem, treeItemLabel, and valueItem allows to style value items depending on how deep they were in the tree.

It is recommended to load the styles using css-loader with modules enabled.

The default styles will not be changed without bumping a major version number.

$3

You can modify the content the component shows. In the simplest case, you can provide a string, but any React element will do.

`jsx
noResults:

,
title:

Choose your poison

,
}} />
`

$3

By default, the top level of the tree items will be sticky: they will stay on the screen if the user is scrolling through a long list.

To make all levels sticky, you need to provide a function that knows the heights of all individual items to correctly calculate the placement. For instance, if every label in your tree is 18 pixels high, use the following function:

`jsx
n * 18} />
``

About Citrusbyte

!Citrusbyte

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