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Analysis of JS motion basic framework instances

Source: Internet
Author: User
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Analysis of JS motion basic framework instances

This article mainly introduces the basic framework of JS motion. examples show how to use javascript timers and div styles. For more information, see

 

 

This article describes the basic framework of JS motion. Share it with you for your reference. The specific analysis is as follows:

Note:

1. Disable the existing timer when starting the movement
2. Separate motion and stop

The Code is as follows:

<! DOCTYPE html>
<Html>
<Head>
<Meta charset = "UTF-8">
<Title> </title>
<Style type = "text/css">
# Div1 {
Width: 200px;
Height: 200px;
Background: red;
Position: absolute;
Left: 0;
Top: 60px;
}
</Style>
<Script type = "text/javascript">
Window. onload = function (){
Var oDiv = document. getElementById ("div1 ");
Var oBt = document. getElementsByTagName ('input') [0];
Var time = null;
OBt. onclick = function (){
ClearInterval (time); // first, you need to disable a timer. This is because the bug that multiple timer stacks are generated when you click the button multiple times during motion.
Time = setInterval (function (){
Var speed = 7;
If (oDiv. offsetLeft <= 600)
ODiv. style. left = oDiv. offsetLeft + speed + 'px ';
Else {
ClearInterval (time );
}
}, 30 );
}
}
</Script>
</Head>
<Body>
<Input type = "button" value = "Start motion"/>
<Div id = "div1"> </div>
</Body>
</Html>

 

I hope this article will help you design javascript programs.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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