点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 数组方法</h1> <p>删除元素会在数组中留下未定义的孔。</p> <p id="demo1"></p> <p id="demo2"></p> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo1").innerHTML = "第一种水果是：" + fruits[0]; delete fruits[0]; document.getElementById("demo2").innerHTML = "第一种水果是：" + fruits[0]; </script> </body> </html>
运行结果
