为此,使用.document.querySelectorAll()
以下是代码 -
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script xx_src="https://code.jquery.com/jquery-1.12.4.js"></script> <script xx_src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet" /> <body> <p class="numberDemo">My Paragraph</p> <p class="numberDemo">My Paragraph</p> <p class="numberDemo">My Paragraph</p> <button id="orderDemo">Click to Order the Paragraph</button> </body> <script> document.getElementById('orderDemo') .addEventListener('click', function (e) { var allHTMLValues = document.querySelectorAll('.numberDemo'); var counter = 1; for (temp of allHTMLValues) { temp.innerText= 'The Paragraph is in order ' + (counter); counter = counter + 1; } }); </script> </html>
要运行上述程序,请保存文件名“anyName.html(index.html)”。右键单击该文件,然后在 Visual Studio Code 编辑器中选择“使用 Live Server 打开”选项。
输出结果
这将在控制台上产生以下输出 -
单击按钮后,您将获得一个序列 -