js遞歸

digui(){
    this.$Request.get('api/groups/tree', {}).then(res => {
        if (res && res.code === 0) {
            if (Array.isArray(res.data)) {
                this.treeData = res.data.map(org => this.mapTree(org));
            }
        }
    })
},

mapTree (org) {
    const haveChildren = Array.isArray(org.children) && org.children.length > 0;
    let expand = false;
    if(this.expandTable[org.id+'']!==null &&this.expandTable[org.id+'']!==undefined ){
        expand = this.expandTable[org.id+''];
    }
    return {
        title: org.groupName,
        label: org.groupName,
        value: org.id,
        data: {...org},
        expand,
        children: haveChildren ? org.children.map(i => this.mapTree(i)) : []
    };
},