<!DOCTYPE html> <html> <body> <h1>JavaScript 数组</h1> <h2>flatMap() 方法</h2> <p id="demo"></p> <script> const myArr = [1, 2, 3, 4, 5,6]; const newArr = myArr.flatMap((x) => x * 2); document.getElementById("demo").innerHTML = newArr; </script> </body> </html>