【Vuetify】Treeview 只允许选择子节点，不允许选择父节点

方法一（推荐）：

.v-treeview-node__toggle + button.v-treeview-node__checkbox {
 display: none !important;
}

参考：

https://stackoverflow.com/questions/60270592/vuetify-treeview-only-allow-children-to-be-selectable

方法二：

item-child="{
  item: any,
  leaf: boolean,
  selected: boolean,
  indeterminate: boolean,
  active: boolean,
  open: boolean
}"