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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数组排序</h1>
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<p>点击按钮按年份对汽车进行排序：</p>
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<button onclick="myFunction()">排序</button>
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<p id="demo"></p>
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<script>
var cars = [
  {type:"BMW", year:2017},
  {type:"Audi", year:2019},
  {type:"porsche", year:2018}
];
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displayCars();
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function myFunction() {
  cars.sort(function(a, b){return a.year - b.year});
  displayCars();
}
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function displayCars() {
  document.getElementById("demo").innerHTML =
  cars[0].type + " " + cars[0].year + "<br>" +
  cars[1].type + " " + cars[1].year + "<br>" +
  cars[2].type + " " + cars[2].year;
}
</script>
​
</body>
</html>
​