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Discussion on Small Issues in JS and CSS Loading_Basic Knowledge

WBOY

Release： 2016-05-16 17:12:19

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In the js script, there are two window.onload

Copy code The code is as follows:

 
window .onload = function(){ 
alert("aaa"); 
}; 

window.onload = function(){ 
alert("bbb"); 
} ; 

will only execute one. This is the setting of the function itself. It is worth noting that what pops up is not aaa, but bbb. The last

in css is executed. In the file, in the css style

copy the code The code is as follows:

 
#checks{ 
 padding-left:20px;padding-top:16px;margin:auto; 
} 
#checks{ 
padding-left:80px;padding-top:38px;margin:auto; 
} 

is also the later style that takes effect. If the padding-left in the second one is removed, use the padding-left in the first

This is the first one to take effect, and it is different from the above two

I hope someone can help explain...

Related labels：

css loading

source：php.cn

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