专注前端素材！
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>素材8网教程(study.sucai8.cn)</title> </head> <body> <p>点击按钮获取数组元素的平方根。</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> var numbers = [4, 9, 16, 25]; function myFunction() { x = document.getElementById("demo") x.innerHTML = numbers.map(Math.sqrt); } </script> </body> </html>
运行结果