字节跳动的一道前端面试题

async function a () {
    var result = Promise.resolve()
    result.absort = function () {
        console.log('xx')
    }
    return result
}
var p = a()
p.absort()//p.absort is not a function

哪位童鞋能帮忙给讲解下，不胜感激