vue-nestable

Drag & drop hierarchical list made as a vue component.

Goals

• A simple vue component to create a draggable list to customizable items
• Reorder items by dragging them above another item
• Intuitively nest items by dragging right
• Fully customizable, ships with no CSS
• Everything is configurable: item identifier, max nesting level, threshold for nesting

Table of contents

• Demo
• Installation
• Usage
• Example
• Styling
• Props
• Slots
• Events
• Hooks

Demo

Live Demo

Installation

Install the plugin:

npm install --save vue-nestable

Use the plugin in your app:

import Vue from 'vue'
import VueNestable from 'vue-nestable'

Vue.use(VueNestable)

You can also import the components on-demand, if you wish to do so:

import { VueNestable, VueNestableHandle } from 'vue-nestable'

export default {
  components: {
    VueNestable,
    VueNestableHandle
  }
  ...
}

Example

You only need two components: vue-nestable which renders the list and vue-nestable-handle which indicates the area the user can drag the item by.

Important Note: Each item must have a unique id property and it must be a valid css class name. It can not contain a :, ,, ., ; or other special characters that are invalid in a css class name.

<template>

  <vue-nestable v-model="nestableItems">
    <vue-nestable-handle
      slot-scope="{ item }"
      :item="item">
      {{ item.text }}
    </vue-nestable-handle>
  </vue-nestable>

</template>

<script type="text/babel">
export default {
  data () {
    return {
      nestableItems: [
        {
          id: 0,
          text: 'Andy'
        }, {
          id: 1,
          text: 'Harry',
          children: [{
            id: 2,
            text: 'David'
          }]
        }, {
          id: 3,
          text: 'Lisa'
        }
      ]
    }
  }
}
</script>

Styling

By default, vue-nestable comes without any styling. Which means you can customize the appearance completely to your needs. However, if you want you can take a look at the style used in the demo: example/assets/vue-nestable.css

Props

The following props can be passed to the <VueNestable> Component:

| Property | Type | Default | Description | | :----------- | :------------------ | :------------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | value | Array | [ ] | Array of objects to be used in the list. Important: Each item must have a unique key by which it can be identified. By default the key is assumed to be named id but you can change it by setting the keyProp property. | | threshold | Number | 30 | Amount of pixels by which the mouse must be move horizontally before increasing/decreasing level (nesting) of current element. | | maxDepth | Number | 10 | Maximum available level of nesting. Setting this to 0 will prevent dragging altogether. | | group | String or Number | random String | Different group numbers may be passed if you have more than one nestable component on a page and want some extra styles for portal instances. | | keyProp | String (Optional) | 'id' | Name of the property that uniquely identifies an item. | | childrenProp | String (Optional) | 'children' | Name of the property that holds an array of children. | | class | String (Optional) | null | Name of the property for classes to add to the item. | | hooks | Object (Optional) | {} | Allows you to register hooks that fire whenever vue-nestable performs some action | | rtl | Boolean (Optional) | false | Add rtl support to vue-nestable |

Slots

The <VueNestable> Component has two slots that can be used to render items and a placeholder. See Example for an example on how to use them.

| Slot Name | Props | Description | | :---------- | :------------------------- | :------------------------------------------------------------------------------------------------------------ | | default | item, index, isChild | This slot is used to render the items in the list, use the scoped-slot property item to render the element. | | placeholder | | Lets you define a custom template that is used when no elements are in the list |

Events

Events are triggered when an item was moved or when a drag operation was completed. When you use v-model to bind your data, the @input event will automatically be handled.

| Event | Parameters | Description | | :----- | :----------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------ | | input | value | triggered whenever the list changes | | change | value, options | triggered when the user dropped the item. options is passed as the second parameter in the event and contains the following properties: { items, pathTo } |

Hooks

Hooks allow you to get finer controll over which items can be moved or take action when a specific item is moved.

Hooks are passed as an Object to the :hooks prop. The object defines a key with the hook name and a function that will be called when the hook fires.

{
  'beforeMove': this.myHookFunction
}

Look here of an example on how to prevent one item from being moved.

| Hook Name | Parameters | Description | | :------------ | :------------------------------- | :------------------------------------------------------------------------------------------- | | beforeMove | { dragItem, pathFrom, pathTo } | Fires when an item is about to be moved. Returning false will cancel that action. |