微信小程序如何将字符串转化成变量吖？eval函数用不了吖

let key = ‘test’;

this.setData({    [key] : ‘aa’}}

1、let a = b+c;

this.setData({

d:a

});

2、this.setData({

d:b+c

});

es6语法

let varName = ‘foo’

let data = {}

data[[varName]] = ‘yes’

console.log(data)// {“foo”: “yes”}