当我尝试像这样运行服务器时,我在deleteUser()中得到错误
零件：

deleteUser(user: User,event: any) {
    event.stopPropagation();
    this.userService
      .deleteUser(user)
      .then(res => {
        this.httpUsers = this.httpUsers.filter(h => h !== user);
        if (this.selectedUser === user) { this.selectedUser = null; }
      })
      .catch(error => this.error = error);
  }

服务：

deleteUser(user: User) {
    console.log('Deleting user');
  }

错误信息：

app/users.component.ts(46,8): error TS2339: Property ‘then’ does not
exist on type ‘void’.

错误的第46行是上面的.then(res => {

谷歌搜索时发现this question所以我从deleteUser函数中删除了void,但没有任何改变.

什么提示我做错了什么？