https://zh.javascript.info/array-methods#jiang-borderleftwidth-zhuan-huan-cheng-borderleftwidth

function sortByName(arr) {
arr.sort((a, b) => a.name > b.name);
}

let john = { name: "John", age: 25 };
let pete = { name: "Pete", age: 30 };
let mary = { name: "Mary", age: 28 };

let arr = [ john, pete, mary ];

sortByName(arr);

// 现在排序是：[john, mary, pete]
alert(arr[1].name); // Mary

如果你测试了就会发现这个打印出来的是pete

正确的是需要修改arr.sort((a, b) => a.age - b.age);