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<!DOCTYPE html>
<html><head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<style>
#board {
background-color: black;
font-family: sans-serif;
color: #000;
font-size: 25px;
padding: 10px;
display: inline-block;
/*宽度太长,(想行内元素, 块级元素)
1.给定宽度
2. 改为行内块 display : inline-block
*/
}
#board.active {
color: red;
</style>
<script>
$(function () {
function toggle() {
let $board = $('#board')
if ($board.hasClass('active')) {
$board.removeClass('active')
} else {
$board.addClass('active')
setInterval(toggle, 200)
})
</head>
<body>
<div id="board">保健用品 二楼左转</div>
</body>
</html>
输入 JavaScript 代码……
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输入 CSS 代码……