you can’t access thistable property in javascript class

class Model {
  constructor(table) {
    // table is undefined, call create..
    this.table = table;
    this.create();
  }
  create() {
    let queryString = `INSERT INTO ${this.table}`;
    console.log(queryString);
  }
}

class UsersModel extends Model {
  constructor(table) {
    // table is undefined, call super..
    super(table); 
    this.table = "users";
    // here you already have table name, so create works with it
    this.create(); 
  }
}

new UsersModel();