The animate function of jquery to realize the effect _jquery of the graphics and text toggle animation

In some pictures on the site we can see in the display of pictures, with the mouse gently slide on the picture can see the text of the picture information, in fact, using jquery animate function can achieve such an animation process.

<div class= "wrap" > 
   <div class=" Cover " 
  > 
    
 
 

We use a div.wrap to place a picture, and a div.cover,cover that needs to be covered, to support any standard HTML content. Then copy the above code into a group of pictures.

Css

We need to use CSS to line up the. Wrap, and to hide a part of the. Cover overlay, when the mouse is sliding up to show it by calling jquery.

. wrap{position:relative float:left; width:200px; height:200px; margin:5px; 
Background: #e8f5fe; Overflow:hidden} 
. Wrap Img{position:absolute top:0 left:0} 
wrap h3{line-height:30px; font-size:14px; color: #fff} 
. Wrap p{ line-height:20px} 
cover{position:absolute; background: #000; height:120px; width:100%; 
padding:3px; top:170px; } 

It is noteworthy that the hidden. Cover part uses the Position:absolute absolute positioning, which overwrites the layer. Cover only displays the title section, just set the top:170px, Because of this. The height of the wrap is 200px, and the height of the caption H3 is 30px, which is subtracted.

Jquery

First I set the opacity of the overlay to 0.8, and then when the mouse slides over the picture, use the hover function to invoke the animate animation.

$ (function () { 
  $ (". Cover"). CSS ("opacity",. 8); 
  $ (". Wrap"). Hover (function () { 
    $ (". Cover", this). Stop (). Animate ({top: 80px "},{queue:false,duration:160}) 
  , function () { 
    $ (". Cover", this). Stop (). Animate ({top: "170px"},{queue:false,duration:160});}); 
 

The animate function is a function of jquery to create a custom animation. The key to this function is to specify the animation form and the result style Property object. Each property in this object represents a style attribute that can be changed (such as "height", "top", or "opacity"). The animation ends when the value of each property indicates how much of the style property is. If it is a numeric value, the Style property is graduated from the current value to the specified value. If you are using a string value such as hide, show, or toggle, the default animation form is invoked for the property.

The above mentioned is the entire content of this article, I hope you can enjoy,