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Simple implementation of adding and removing Class,addclass/removeclass

Source: Internet
Author: User
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This method is implemented by the method of array and string, and can not meet the practical application, but only for learning ~ ~ ~

The characteristics of this method:

    • Support for class additions without class nodes
    • Support for adding nodes that already have a single or multiple class
    • Mask already has a duplicate class for the node that wants to be with classname
    • Adding multiple classes at once is not supported temporarily
    • Remove class to support a single class node removal
    • Remove class supports multiple class nodes to remove a single class
    • Temporarily unable to "perfect" support removing multiple classes at once

The following is the source code:

1 <!DOCTYPE HTML>2 <HTMLxmlns= "http://www.w3.org/1999/xhtml">3 <Head>4     <Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" />5     <title>AddClass</title>6     <Script>7 window.onload= function () {8             9 Ten             functionaddclass (obj, className) { One                 if(Obj.classname=== "') { A Obj.classname=ClassName; -                 } Else { -                     //if the class that you want to add does not exist in the original class the                     varArrclassname=Obj.className.split (' '); -                     if(Arrindexof (Arrclassname, ClassName)=== -1) { - Obj.classname+= ' ' +ClassName; -                     } +                     //if the class you want to add exists in the original class, do not manipulate the -  +                 } A             } at  -             functionremoveclass (obj, className) { -                 //First judge if obj has classname -                 if(Obj.classname!= "') { -                     varArrclassname=Obj.className.split (' '); -                     varClassindex=Arrindexof (Arrclassname, className); in                     if(Classindex!==-1) { - Arrclassname.splice (Classindex,1); to Obj.classname=Arrclassname.join (' '); +                     } -                 } the             } *  $             functionArrindexof (arr, v) {Panax Notoginseng                  for (varI= 0; I<arr.length; I++) { -                     if(Arr[i]==v) { the                         returni; +                     } A                 } the                 return -1; +             } -  $             functionOutputclassname (infocon,info) { $ infocon.innerhtml=info; -             } -  the             varOdiv=document.getElementById ('Div1'); -             varMText=document.getElementById ('Text1');Wuyi             varMBTN1=document.getElementById ('BTN1'); the             varmBtn2=document.getElementById ('btn2'); -  Wu Mbtn1.onclick= function() { - addclass (Odiv, mtext.value); About outputclassname (Odiv, odiv.classname); $             }; - Mbtn2.onclick= function () { - removeclass (Odiv, mtext.value); - outputclassname (Odiv, odiv.classname); A             }; +         } the     </Script> - </Head> $     <Body> the         <inputID= "Text1"type= "text"value= "Newclass"/><inputID= "BTN1"value= "Add class"type= "button"/><inputID= "BTN2"value= "Removeclass"type= "button"/> the         <P>ClassName of the target element: (temporarily adding more than one classname is not supported)</P> the         <DivID= "Div1"></Div> the      -  in     </Body> the </HTML>

Original articles, reproduced please indicate the source: http://www.eyezip.com/?p=992

Simple implementation of adding and removing Class,addclass/removeclass

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