<html><body><h1>JavaScript Array 对象</h1><p>这个“自制的” isArray () 函数在数组上使用时返回 true：</p><p id="demo"></p><script>const fruits = ["Banana", "Orange", "Apple", "Mango"];document.getElementById("demo").innerHTML = isArray(fruits);function isArray(myArray) { return myArray.constructor === Array;}</script></body></html>