如何使用 JavaScript 在同数组中复制数组元素?
以下是复制数组元素到同一数组的代码 -
示例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" > <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result,.sample { font-size: 18px; font-weight: 500; color: rebeccapurple; } .result { color: red; } </style> </head> <body> <h1>Duplicate elements of an array in the same array</h1> <div class="sample">[1,2,3,4,'A']</div> <div class="result"></div> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to duplicate the elements of the above array</h3> <script> let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let arr = [1, 2, 3, 4, "A"]; BtnEle.addEventListener("click", () => { arr = arr.concat(arr).sort(); resEle.innerHTML = arr; }); </script> </body> </html>
输出
上述代码会生成以下输出 -
点击“点击此处”按钮后 -
广告