I. Grammatical structure of animate
Animate (Params,speed,callback)
Params: A mapping that contains style attributes and values, such as{key1:value1,key2:value2}
Speed: Speed parameter [optional]
Callback: Functions that are executed when the animation completes [optional]
Two, custom simple animation
Use a simple example to illustrate the effect of clicking a div across the page.
<style>
#cube {
position:relative;/* does not add this sentence element cannot move
/width:30px;
height:30px;
background:red;
Cursor:pointer;
}
</style>
<body>
<div>
<div id= "Cube" ></div>
</div>
<script>
$ (function () {
$ ("#cube"). Click (function () {
$ (this). Animate ({left: "100px"}, )})
</script>
To make the element move, change the left property. To be able to affect the element top, right, bottom, left property value must declare the element's position.
Demo effect
Third, cumulative, tired minus animation
In the previous code, {left:"100px"} this property was set as a parameter, and if overridden to, the effect is as {left:"+=25px"} follows
Demo effect
Four, multiple animation
Perform multiple animations at the same time
The example above is a very simple animation. If you want to perform multiple animations at the same time, for example, when the element is sliding to the right, magnify the element height.
The code is as follows:
$ (this). Animate ({left: "+=25px", Height: "+=20px"},1000)
Demo effect
Perform multiple animations in sequence
In the example above, sliding to the right and height is happening at the same time, if you want the square to slide to the right and then higher, just split the code
As follows:
$ (this). Animate ({left: "+=25px"},500)
. Animate ({height: "+=20px"},500)
The execution of an animation effect like this is sequential, called an "animation queue"
Demo effect
VI. Integrated Examples
Click the box, let him move to the right while increasing, opacity from 50% to 100%, then move up and down, widen, finish and fade out.
$ ("#cube"). Click (function () {
$ (this). Animate ({left: "100px", Height: "100px", Opacity: "1"},500)
. Animate ({ Top: "40px", Width: "100px"},500)
. fadeout (' Slow ')
})
These effects can be queued in a chained fashion when multiple effects are applied to the same element.
Demo Effect
Seven, animation callback function
In the example above, if you want to switch the CSS style (Background:blue) in the last step instead of fading out, if you follow the usual process, the relevant code is as follows:
$ ("#cube"). Click (function () {
$ (this). Animate ({left: "100px", Height: "100px", Opacity: "1"},500)
. Animate ({top: "40px", Width: "100px"},500)
. CSS ("Border", "5px solid Blue")/change this line
})
However, the css() method is called in advance.
Demo effect
This problem is caused by the fact that the css() method is not added to the animation queue, but is executed immediately. You can use callback functions to queue a non-animated method implementation.
The correct related code is as follows:
$ ("#cube"). Click (function () {
$ (this). Animate ({left: "100px", Height: "100px", Opacity: "1"},500)
. Animate ({ Top: "40px", Width: "100px"},500,function () {
$ (this). CSS ("Border", "5px Solid Blue")})
Demo effect
Notably, callback applies to all of the jquery animation methods, such as slidDown() , and show() so on.
Summarize
The above is about the animate in jquery several uses and notices, hope this article content to everybody's study or work can bring certain help, if has the question everybody may the message exchange. Thank you for your support to the cloud-dwelling community.
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