html运行实例（js_oper_instanceof）-搜寻教程库

代码示例：（标识：js_oper_instanceof）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 运算符</h1>

<h2>instanceof 运算符</h2>

<p>instanceof 运算符会在一个对象是指定对象的实例时返回 true。</p>

<p id="demo"></p>

<script> 
const cars = ["Saab", "Volvo", "BMW"];

document.getElementById("demo").innerHTML =
(cars instanceof Array) + "<br>" + 
(cars instanceof Object) + "<br>" +
(cars instanceof String) + "<br>" +
(cars instanceof Number);
</script>

</body>
</html>