var a= {
    "providers": [{
            "_id": "5cda8a7234157a00265258f2",
            "updatedAt": "2019-05-30T12:53:18.076Z",
            "createdAt": "2019-05-14T09:29:23.663Z",
            "name": "BROOD"
        },
        {
            "_id": "5cda8a723415f200265258f2",
            "updatedAt": "2019-05-30T12:53:18.076Z",
            "createdAt": "2019-05-14T09:29:23.663Z",
            "name": "REDUX"
        }
    ]
}
console.log(a['providers'][0].name) 

代码还可以，建议您在使用api之前尝试访问它的数据。使用await来通话。

json对象的问题读取属性

我使用来自API的请求的主体响应，并且在使用console.log函数时得到如下所示的主体

var a= {
    "providers": [{
            "_id": "5cda8a7234157a00265258f2",
            "updatedAt": "2019-05-30T12:53:18.076Z",
            "createdAt": "2019-05-14T09:29:23.663Z",
            "name": "BROOD"
        },
        {
            "_id": "5cda8a723415f200265258f2",
            "updatedAt": "2019-05-30T12:53:18.076Z",
            "createdAt": "2019-05-14T09:29:23.663Z",
            "name": "REDUX"
        }
    ]
}
console.log(a['providers'][0].name)