Javascript中动态为对象属性（键值对）赋值

可以使用Object.defineProperty方法
示例如下

let attr1 = ['a', 'b', 'c'];
let attr2 = [1, 2, 3];

const json = {};

for (let i = 0; i < Math.min(attr1.length, attr2.length); i++)
    Object.defineProperty(json, attr1[i], { value: attr2[i], writable: true });

console.log(json.a, json.b, json.c);  // 1 2 3