<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <title></title> <script src="jquery-3.5.1.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> $(document).ready(function() { var jqBtn = $("button"); var jqIpt = $("input"); var jqCkb = $("input:checkbox"); jqBtn.click(function() { jqIpt.attr("abc", "furong"); console.log(jqIpt.attr("abc")); jqIpt.attr("class", "quange"); // jqCkb.attr("checked", true); // 一次性的 jqCkb.prop("checked", true); }); }); </script> </head> <body> <button type="button">button</button> <input type="" name="" id="" value="" /> <input type="checkbox" name="" id="" value="" /> </body> </html>
