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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 类没有被提升</h1>
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<p>如果在声明类之前尝试使用类，则会出现错误。</p>
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<p id="demo"></p>
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<script>
//You cannot use the class yet.
//myCar = new Car("Ford")
//This would raise an error.
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class Car {
  constructor(brand) {
    this.carname = brand;
  }
}
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//Now you can use the class:
let myCar = new Car("Ford")
</script>
​
</body>
</html>
​