element-plus/docs/examples/tree/disabled.vue

<template>
  <el-tree :data="data" :props="defaultProps" show-checkbox />
</template>

<script lang="ts">
export default {
  data() {
    return {
      data: [
        {
          id: 1,
          label: 'Level one 1',
          children: [
            {
              id: 3,
              label: 'Level two 2-1',
              children: [
                {
                  id: 4,
                  label: 'Level three 3-1-1',
                },
                {
                  id: 5,
                  label: 'Level three 3-1-2',
                  disabled: true,
                },
              ],
            },
            {
              id: 2,
              label: 'Level two 2-2',
              disabled: true,
              children: [
                {
                  id: 6,
                  label: 'Level three 3-2-1',
                },
                {
                  id: 7,
                  label: 'Level three 3-2-2',
                  disabled: true,
                },
              ],
            },
          ],
        },
      ],
      defaultProps: {
        children: 'children',
        label: 'label',
        disabled: 'disabled',
      },
    }
  },
}
</script>