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Wednesday, 10 August 2016

Twitter Bootstrap Interview Questions and Answers


Twitter Bootstrap Interview Questions and Answers

Question: How to make twitter bootstrap menu dropdown on hover rather than click?
ul.nav li.dropdown:hover > ul.dropdown-menu {
    display: block;    
}



Question: How can I make Bootstrap columns all the same height??
.row {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  flex-wrap: wrap;
}
.row > [class*='col-'] {
  display: flex;
  flex-direction: column;
}



Question: What is sr-only in Bootstrap 3??
It is class used to hide information intended only for screen readers from the layout of the rendered page.


Question: How to disallow twitter bootstrap modal window from closing?
<a data-backdrop="static" data-controls-modal="my_div_id" data-keyboard="false" href="https://www.blogger.com/blogger.g?blogID=5911253879674558037#"></a>



Question: What are different 4 tiers in twitter bootstrap?
  1. Extra small devices like smartphones (.col-xs-*)
  2. Small devices like tablets(.col-sm-*)
  3. Medium devices like laptops (.col-md-*)
  4. large devices like laptops/desktops(.col-lg-*)



Question: How to use media queries in twitter bootstrap 3?
@media(max-width:767px){}
@media(min-width:768px){}
@media(min-width:992px){}
@media(min-width:1200px){}



Question: How to use media queries in twitter bootstrap 4?
@media(min-width:34em){}
@media(min-width:48em){}
@media(min-width:62em){}
@media(min-width:75em){}



Question: What is an em?
An em is a unit in the field of typography, One em is equal to the 16 point size.



Question: How to open a Bootstrap modal?
$('#myModalId').modal('toggle');
$('#myModalId').modal('show');
$('#myModalId').modal('hide');
 



Question: How to make responsive image with align center?
.img-responsive {
    margin: 0 auto;
}
 



Question: How to create Confirm box before deleting modal/dialog?
Add data-target="#confirm-delete-id" in A tag

<a data-href="/delete-rec?id=203" data-target="#confirm-delete-id" data-toggle="modal" href="https://www.blogger.com/blogger.g?blogID=5911253879674558037#">Delete record #203</a>
 

Add HTML for confirmation box
<div aria-hidden="true" aria-labelledby="myModalLabel" class="modal fade" id="confirm-delete-id" role="dialog" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
</div>
<div class="modal-body">
</div>
<div class="modal-footer">
<button class="btn btn-default" data-dismiss="modal" type="button">Cancel</button>
                <a class="btn btn-danger btn-ok" href="https://www.blogger.com/null">Delete</a>
            </div>
</div>
</div>
</div>

 



Question: How to disabled the button?
$('#buttonId').prop('disabled', true);
 



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