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<!DOCTYPE html> <html> <body> <h1>JavaScript 数组</h1> <p>Array.lastIndexOf() 返回指定值的最后一个位置。</p> <p id="demo"></p> <script> const fruits = ["Apple", "Orange", "Apple", "Mango"]; document.getElementById("demo").innerHTML = fruits.lastIndexOf("Apple"); </script> </body> </html>