do something if element hidden

2018-05-29 18:56:56

This question already has an answer here:

How do I check if an element is hidden in jQuery? 53 answers

try something like this

if($('#testElement').is(':visible')){
   //what you want to do when is visible
}

for your code

if($('input[name="firstname"], input[name="lastname"]').is(':visible')){
  $('input[name="fullname"]').hide();
}

REFERENCE

http://api.jquery.com/visible-selector/

you should change

<input type="text" name="fullname"> 
to 
<input type="hidden" name="fullname">

to make an input field hidden

这应该工作$(element).is(":visible")

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