​x
 
<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript Array.isArray()</h1>
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<p>单击按钮以检查“fruits”是否为数组。</p>
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<button onclick="myFunction()">试一试</button>
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<p id="demo"></p>
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<script>
function myFunction() {
  var fruits = ["Banana", "Orange", "Apple", "Mango"];
  var x = document.getElementById("demo");
  x.innerHTML = Array.isArray(fruits);
}
</script>
​
</body>
</html>
​