0
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Demo</title>
<style type="text/css">
#gallery
{
width: 960px;
margin: 0 auto;
}
.galleryitem
{
width: 300px;
height: 300px;
float: left;
font-family: Lucida Sans Unicode, Arial;
font-style: italic;
font-size: 13px;
border: 5px solid black;
margin: 3px;
}
.galleryitem img
{
width: 300px;
}
.galleryitem p
{
text-indent: 15px;
}
#galleryhoverp
{
margin-top: -55px;
background-color: black;
opacity: 0.5;
-moz-opacity: 0.5;
filter: alpha(opacity=50);
height: 40px;
color: white;
padding-top: 10px;
}
#singleimagedisplay
{
width: 800px;
}
#singleimagedisplay img
{
width: 800px;
}
#singleimagedisplay a
{
float: right;
color: white;
}
</style>
</head>
<body>
<div id="gallery">
<div class="galleryitem">
<img src="computer1.png" alt="A beautiful Sunset over a field" /><p>
A beautiful Sunset over a field</p>
</div>
<div class="galleryitem">
<img src="computer2.png" alt="Some penguins on the beach" /><p>
Some penguins on the beach</p>
</div>
<div class="galleryitem">
<img src="computer3.png" alt="The sun trying to break through the clouds" /><p>
The sun trying to break through the clouds</p>
</div>
<div class="galleryitem">
<img src="computer.png" alt="Palm tress on a sunny day" /><p>
Palm tress on a sunny day</p>
</div>
<div class="galleryitem">
<img src="computer4.png" alt="The sun bursting through the tall grass" /><p>
The sun bursting through the tall grass</p>
</div>
</div>
</body>
</html>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
$('p').hide();
var galleryItems = $('.galleryitem');
galleryItems.css('height', '200px');
var images = $('.galleryitem').find('img');
galleryItems.hover(
function() {
$(this).children('p').show().attr('id', 'galleryhoverp');
},
function() {
$(this).children('p').hide().attr('id', '');
}
)
images.click(function() {
$(this).parent().attr('id', 'singleimagedisplay').css('height', $(this).height()).siblings().hide();
})
</script>
上面的代碼瞭解不同$(這)就是從這裏開始:http://www.1stwebdesigner.com/tutorials/jquery-beginners-4/試圖在jQuery的
問:
對於此行:$(this).parent().attr('id', 'singleimagedisplay').css('height', $(this).height()).siblings().hide();
1.I知道第一$(this)
手段點擊了img,但是sencond $(this)
是什麼意思?
2.when當我點擊前端的一個img時,我可以看到img得到放大,並且它在螢火蟲中顯示style="height: 533px;
,但它怎麼會是533px?在css腳本中,沒有像height: 533px
這樣的定義。
第二個'$(this)'應該是相同的元素... – elclanrs
它是相同的元素,您仍處於相同的上下文中... – PSL