题解 | #列表动态渲染#

var people = [
      { name: '牛油1号', id: 1, age: 20 },
      { name: '牛油2号', id: 2, age: 21 },
      { name: '牛油3号', id: 3, age: 19 },
    ]
    var ul = document.querySelector('ul');

    let lis = people.reduce((lis, current) => lis += `<li>${current.name} ${current.age}岁</li>`, '')

    document.getElementsByTagName('ul')[0].innerHTML = lis