Tree V2 虚拟化树形控件^beta

​

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    :props="props"
    :height="208"
  />
</template>
<script lang="ts" setup>
interface Tree {
  id: string
  label: string
  children?: Tree[]
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
      }
    })
}

const props = {
  value: 'id',
  label: 'label',
  children: 'children',
}
const data = createData(4, 30, 40)
</script>

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    :props="props"
    show-checkbox
    :height="208"
  />
</template>
<script lang="ts" setup>
interface Tree {
  id: string
  label: string
  children?: Tree[]
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
      }
    })
}

const props = {
  value: 'id',
  label: 'label',
  children: 'children',
}
const data = createData(4, 30, 40)
</script>

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    :props="props"
    show-checkbox
    :height="208"
  />
</template>
<script lang="ts" setup>
interface Tree {
  id: string
  label: string
  children?: Tree[]
  disabled: boolean
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
        disabled: nodeKey.includes('2'),
      }
    })
}

const props = {
  value: 'id',
  label: 'label',
  children: 'children',
  disabled: 'disabled',
}
const data = createData(4, 30, 40)
</script>

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    :height="208"
    :props="props"
    show-checkbox
    :default-checked-keys="defaultCheckedKeys"
    :default-expanded-keys="defaultExpandedKeys"
  />
</template>
<script lang="ts" setup>
import { ref } from 'vue'

interface Tree {
  id: string
  label: string
  children?: Tree[]
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
      }
    })
}

const props = {
  value: 'id',
  label: 'label',
  children: 'children',
}
const data = createData(4, 30, 40)
const checkedKeys: string[] = []
const expanedKeys: string[] = []
for (const datum of data) {
  const children = datum.children
  if (children) {
    expanedKeys.push(datum.id)
    checkedKeys.push(children[0].id)
    break
  }
}

const defaultCheckedKeys = ref(checkedKeys)
const defaultExpandedKeys = ref(expanedKeys)
</script>

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    :props="props"
    :height="208"
  >
    <template #default="{ node }">
      <span class="prefix" :class="{ 'is-leaf': node.isLeaf }"
        >[ElementPlus]</span
      >
      <span>{{ node.label }}</span>
    </template>
  </el-tree-v2>
</template>
<script lang="ts" setup>
interface Tree {
  id: string
  label: string
  children?: Tree[]
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
      }
    })
}

const props = {
  value: 'id',
  label: 'label',
  children: 'children',
}
const data = createData(4, 30, 40)
</script>

<style scoped>
.prefix {
  color: var(--el-color-primary);
  margin-right: 10px;
}
.prefix.is-leaf {
  color: var(--el-color-success);
}
</style>

<template>
  <el-tree-v2
    style="max-width: 600px"
    :data="data"
    show-checkbox
    :expand-on-click-node="false"
    :props="{ class: customNodeClass }"
  />
</template>

<script lang="ts" setup>
import type {
  TreeNode,
  TreeNodeData,
} from 'element-plus/es/components/tree-v2/src/types'

interface Tree {
  id?: string
  value?: string
  label?: string
  isPenultimate?: boolean
  children?: Tree[]
}

const customNodeClass = ({ isPenultimate }: TreeNodeData, node: TreeNode) =>
  isPenultimate ? 'is-penultimate' : ''

const data: Tree[] = [
  {
    id: '1',
    label: 'Level one 1',
    children: [
      {
        id: '4',
        label: 'Level two 1-1',
        isPenultimate: true,
        children: [
          {
            id: '9',
            label: 'Level three 1-1-1',
          },
          {
            id: '10',
            label: 'Level three 1-1-2',
          },
        ],
      },
    ],
  },
  {
    id: '2',
    label: 'Level one 2',
    isPenultimate: true,
    children: [
      {
        id: '5',
        label: 'Level two 2-1',
      },
      {
        id: '6',
        label: 'Level two 2-2',
      },
    ],
  },
  {
    id: '3',
    label: 'Level one 3',
    isPenultimate: true,
    children: [
      {
        id: '7',
        label: 'Level two 3-1',
      },
      {
        id: '8',
        label: 'Level two 3-2',
      },
    ],
  },
]
</script>

<style>
.is-penultimate > .el-tree-node__content {
  color: var(--el-color-primary);
}
</style>

<template>
  <el-input
    v-model="query"
    style="width: 240px"
    placeholder="Please enter keyword"
    @input="onQueryChanged"
  />
  <el-tree-v2
    ref="treeRef"
    style="max-width: 600px"
    :data="data"
    :props="props"
    :filter-method="filterMethod"
    :height="208"
  />
</template>
<script lang="ts" setup>
import { ref } from 'vue'
import { ElTreeV2 } from 'element-plus'
import type { TreeNodeData } from 'element-plus/es/components/tree-v2/src/types'

interface Tree {
  id: string
  label: string
  children?: Tree[]
}

const getKey = (prefix: string, id: number) => {
  return `${prefix}-${id}`
}

const createData = (
  maxDeep: number,
  maxChildren: number,
  minNodesNumber: number,
  deep = 1,
  key = 'node'
): Tree[] => {
  let id = 0
  return Array.from({ length: minNodesNumber })
    .fill(deep)
    .map(() => {
      const childrenNumber =
        deep === maxDeep ? 0 : Math.round(Math.random() * maxChildren)
      const nodeKey = getKey(key, ++id)
      return {
        id: nodeKey,
        label: nodeKey,
        children: childrenNumber
          ? createData(maxDeep, maxChildren, childrenNumber, deep + 1, nodeKey)
          : undefined,
      }
    })
}

const query = ref('')
const treeRef = ref<InstanceType<typeof ElTreeV2>>()
const data = createData(4, 30, 5)
const props = {
  value: 'id',
  label: 'label',
  children: 'children',
}

const onQueryChanged = (query: string) => {
  // TODO: fix typing when refactor tree-v2
  // eslint-disable-next-line @typescript-eslint/ban-ts-comment
  // @ts-expect-error
  treeRef.value!.filter(query)
}
const filterMethod = (query: string, node: TreeNodeData) =>
  node.label!.includes(query)
</script>