vue-nestable-prima

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.