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<!DOCTYPE html> <html> <body> <h1>JavaScript 数组</h1> <h2>at() 方法</h2> <p>at() 方法从数组中返回指定索引的元素：</p> <p id="demo"></p> <script> const fruits = ["Banana", "Orange", "Apple", "Mango"]; let fruit = fruits.at(2); document.getElementById("demo").innerHTML = fruit; </script> </body> </html>