abstrak：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>微博輸入</title>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>微博輸入</title>
<style>
.box{
border: 10px solid pink;
width: 600px;
height: 160px;
margin: 0 auto;
padding: 10px;
}
img{float: left;}
.box1{
float: left;
margin-left: 200px;
width: 150px;
height: 24px;
text-align: right;
font-size: 14px;
color: #888;
}
.box1 span{
font-size: 18px;
font-weight: bold;
}
#text{
width: 600px;
height: 100px;
border: 1px solid #888;
margin-top: 5px;
}
.box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{
float: left;
width: 30px;
height: 32px;
line-height: 32px;
padding-left: 26px;
font-size: 14px;
}
#sp1{
background: url("images/an5.png") no-repeat left center;
}
#sp2{
background: url("images/an4.png") no-repeat left center;
}
#sp3{
background: url("images/an3.png") no-repeat left center;
}
#sp4{
background: url("images/an2.png") no-repeat left center;
}
#sp5{
background: url("images/an1.png") no-repeat left center;
}
#sp6{
margin-left: 160px;
margin-right: 15px;
}
#bt{
float: left;
width: 80px;
height: 30px;
border: none;
background-color: #ffc09f;
color: white;
border-radius: 5px;
}
</style>
</head>
<body>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">還可以輸入<span id="number"></span>字</div>
<textarea id="text"></textarea>
<span id="sp1">表情</span>
<span id="sp2">圖片</span>
<span id="sp3">視頻</span>
<span id="sp4">話題</span>
<span id="sp5">微博</span>
<span id="sp6">公開</span>
<input type="button" id="bt" value="發(fā)布">
</div>
<script type="text/javascript">
var text,number,m;
text=document.getElementById('text');
number=document.getElementById('number');
bt=document.getElementById('bt');
text.onkeyup=function aa() {
m=140-text.value.length;
console.log(m);
if (m < 0){
number.style.color='red';
}else{
number.style.color='#888';
}
number.innerHTML=m;
}
</script>
</body>
</html>利用鍵盤按下事件觸發(fā)判斷已輸入的字數(shù)。
Guru membetulkan：查無此人Masa pembetulan：2019-05-17 09:59:56
Rumusan guru：完成的不錯。學編程，先從模仿開始，繼續(xù)加油。