clearing input placeholder in iOS5

问题:

I noticed that in iOS5, input placeholder text doesn't clear automatically on focus.

I tried this jquery function but it's not working:

$('input[type="number"]').focus(function(){ $('this').attr('placeholder',''); }); 

回答1:

It looks to me the problem lies here

$('this').attr('placeholder',''); 

Try replacing:

$('this') 

With

$(this) 

文章来源: clearing input placeholder in iOS5