The right answer

Bootstrap 4.x

Bootstrap 4.x uses the new .d-none class. Instead of using either .hidden, or .hide if you're using Bootstrap 4.x use .d-none.

<div id="myId" class="d-none">Foobar</div>

• To show it: $("#myId").removeClass('d-none');
• To hide it: $("#myId").addClass('d-none');
• To toggle it: $("#myId").toggleClass('d-none');

(thanks to the comment by Fangming)

Bootstrap 3.x

First, don't use .hide! Use .hidden. As others have said, .hide is deprecated,

.hide is available, but it does not always affect screen readers and is deprecated as of v3.0.1

Second, use jQuery's .toggleClass(), .addClass() and .removeClass()

<div id="myId" class="hidden">Foobar</div>

• To show it: $("#myId").removeClass('hidden');
• To hide it: $("#myId").addClass('hidden');
• To toggle it: $("#myId").toggleClass('hidden');

Don't use the css class .show, it has a very small use case. The definitions of show, hidden and invisible are in the docs.

// Classes.show {  display: block !important;}.hidden {  display: none !important;  visibility: hidden !important;}.invisible {  visibility: hidden;}

Simply:

$(function(){  $("#my-div").removeClass('hide');});

Or if you somehow want the class to still be there:

$(function(){  $("#my-div").css('display', 'block !important');});

Use bootstrap .collapse instead of .hidden

Later in JQuery you can use .show() or .hide() to manipulate it