4dkankan-components/docs/examples-bk/tree-v2/custom-node.vue

<template>
    <el-tree-v2 :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>