vue3-tree-vue

A Simple vue3 project for rendering items in a tree.

npm i vue3-tree-vue

Handling Selected Items:

<template>    
    <!-- Default makes items selectable (one at a time) -->
    <vue3-tree-vue :items="items" 
                   :isCheckable="false"
                   :hideGuideLines="false"
                   v-model:selectedItem="selectedItem">
      <!-- Applying some simple styling to tree-items -->
       <template v-slot:item-prepend-icon="treeViewItem" >
              <img src="./assets/folder.svg"
                   alt="folder"
                   v-if="treeViewItem.type === 'folder'"
                   height="20" width="20" />
       </template>
    </vue3-tree-vue>
</template>

Handling Checked Items

  setup() {
    const selectedItems = ref<TreeViewItem[]>([]);
    const items = ref<TreeViewItem[]>([]); // define your tree items here.
    
    return {
      selectedItems,
      items
    }
  }

<template>
    <vue3-tree-vue :items="items" 
                   :isCheckable="true"
                   :hideGuideLines="false"
                   v-model:checkedItems="selectedItems"/>
</template>

Properties

Property	Default	Description
items	Empty array	An array of TreeViewItem.
hideGuideLines	false	Determines the visibility of the guidelines
selectedItem	undefined	Defines the item that is selected on the tree
checkedItems	An empty array	Defines the items that are checked on the tree
isCheckable	false	Defines if items can be selected (one at a time) or selected (using a checkbox)
expandedTypes	An empty array	Defines an array of strings. Each node which a type present in this array will be expanded by default.
expandedIds	An empty array	Defines an array of strings. Each node which an id present in this array will be expanded by default.
expandAll	false	If true all nodes in the tree will be expanded by default.

Event Handlers

Events	Description
onSelect	Callback function when an item is selected from the tree .Returns an ItemEventArgs.
onCheck	Callback function when an item is checked/unchecked from the tree.

The `onCheck` event may be fired more than once to show the change in state of deep hierachies.

Styles

Class	Description
selected-tree-item	Defines the style for the selectedItem

Slots

Name	Description
item-prepend-icon	Defines the node's prepend icon.
item-prepend	Defines a slot to house an content before the node's label.