This how to write-CodePudding

CodePudding user response:

I am a paragraph!

CodePudding user response:

 
 
 
<script> 
The function of CSS (element, propName, propVal) {
If (propVal!==! 1 & amp; & ! PropVal) {
The return element. Style [propName]//the return value 
} else {
Element. Style [propName]=propVal. ToString ()//set the style 
} 
} 
Const element=document. GetElementById (" test "); 
Const backgroundColor=CSS (element, "backgroundColor"); 
The console. The log (backgroundColor);//=& gt; Black 
CSS (element, "backgroundColor", "blue"); 
The console. The log (element. Style. BackgroundColor);//=& gt; 'blue' 
</script>

CodePudding user response:

 
<body> 
 I am a paragraph! 
 
<script type="text/javascript"> 
//add code here 
The function of CSS () {
Var elem=the arguments [0]. 
Var attr=the arguments [1]. 
Var value=https://bbs.csdn.net/topics/arguments [2]; 
If (the arguments. Length==2) {
Return elem. Style [attr] | | 'black'. 
} else if (the arguments. Length==3) {
Elem. Style [attr]=value 
} 

} 
The parameter//3 
CSS (document. GetElementById () 'test', 'background - color', 'orange') 
//two parameters obtained by default color black 
Var v=CSS (document. GetElementById () 'test', 'color') 
The console. The log (v) 
</script>