关于前端:eltree的全部展开收缩

利用于vue
开展

Expand() {      debugger;      this.$nextTick(() => {        debugger;        for (var i = 0; i < this.$refs.tree.store._getAllNodes().length; i++) {          debugger;          this.$refs.tree.store._getAllNodes()[i].expanded = true;        }      });    },

收起

shrink() {      this.$nextTick(() => {        debugger;        for (var i = 0; i < this.$refs.tree.store._getAllNodes().length; i++) {          debugger;          this.$refs.tree.store._getAllNodes()[i].expanded = false;        }      });    },