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Regarding DOM methods

 
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Hi Can anyone here please explain me what does the following code do with an example?

while(node.firstChild)
node.removeChild(node.firstChild)

assume node is sth like var node=document.getElementById(id);

I know that it removes all the child nodes of a node represented by id="id". I dont know how a while loop works here.

Thanks
Vivek
 
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It loops until there are no more children left.

Eric
 
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