<!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>
