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js_first_append03_0629.html
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js_first_append03_0629.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.red{
color: red;
}
.blue{
color: blue
}
</style>
</head>
<body>
<button type="button" id="myBtn">myBtn</button>
<button type="button" id="addBtn">addBtn</button>
<hr>
<ul>
<li>111 Lorem ipsum.</li>
<li>222 Lorem ipsum.</li>
<li>333 Lorem ipsum.</li>
<li>444 Lorem ipsum.</li>
<li>555 Lorem ipsum.</li>
</ul>
<!-- 1. jquery -->
<!-- 2. 開始寫jquery -->
<!-- 1. jquery -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
integrity="sha512-894YE6QWD5I59HgZOGReFYm4dnWc1Qt5NtvYSaNcOP+u1T9qYdvdihz0PPSiiqn/+/3e7Jo4EaG7TubfWGUrMQ=="
crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!-- 2. 開始寫jquery -->
<!-- append vs after 後面-->
<!-- prepend vs before 前面-->
<script>
// jquery
// $(function(){
$(document).ready(function(){
// append
const appendP = $('<li>appendP Lorem ipsum dolor sit amet.</li>');
const ul = $('ul').first();
ul.append(appendP);
//after
const afterP = $('<p>afterP Lorem ipsum dolor sit amet.</p>');
ul.after(afterP);
//append
const prependP = $('<li>prependP Lorem ipsum dolor sit amet.</li>');
ul.prepend(prependP);
//before
const beforeP = $('<p>beforeP Lorem ipsum dolor sit amet.</p>');
ul.before(beforeP);
// ctrl + h => 取代
// addClass 增加class
// removeClass 減少class
// 練習一
// before after => blue
// append prepend => red
});
// jquery end
</script>
</body>
</html>