2.26.2-練習:テキストボックスに文字を入力し、横でヒント効果を拡大します.
13542 ワード
練習2文字のフォントを入力して拡大してからヒントを与える.
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documenttitle>
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 300px;
margin: 0 auto;
position: relative;
}
p {
width: 200px;
height: 30px;
margin-top: 50px;
}
#enlarge {
width: 200px;
height: 30px;
font-size: 16px;
line-height: 30px;
display: none;
background-color: greenyellow;
position: absolute;
top: 0;
}
span {
display: block;
height: 0;
width: 0;
border: 11px solid transparent;/*transparent */
border-top-color: greenyellow;
position: absolute;
top: 30px;
left: 50px;
}
input {
outline: none;
width: 200px;
height: 20px;
margin-top: 12px;
}
style>
head>
<body>
<div class="box">
<p> p>
<div id="enlarge">
<span>span>
div>
<input type="text">
div>
<script>
var inp = document.querySelector('input');
var enlarge = document.querySelector('#enlarge');
//
inp.onfocus = function() {
//
document.addEventListener('keyup', function(e) {
console.log(e.key);
if (inp.value === '') {
enlarge.style.display = 'none';
} else {
enlarge.style.display = 'block';
enlarge.innerHTML = inp.value + "";
}
});
}
script>
body>
html>