1 . vertical-align with Bootstrap 3?

Answer :

With the advent of the CSS Flexible Box, many of web designers' nightmares1 have been resolved. One of the most hacky ones, the vertical alignment. Now it is possible even in unknown heights.

"Two decades of layout hacks are coming to an end. Maybe not tomorrow, but soon, and for the rest of our lives."

— CSS Legendary Eric Meyer at W3Conf 2013

Flexible Box (or in short, Flexbox), is a new layout system that is specifically designed for layout purposes. The specification states:

Flex layout is superficially similar to block layout. It lacks many of the more complex text- or document-centric properties that can be used in block layout, such as floats and columns. In return it gains simple and powerful tools for distributing space and aligning content in ways that webapps and complex web pages often need.

How can it help in this case? Well, let's see.

Vertical aligned columns

Using Twitter Bootstrap we have .rows having some .col-*s. All we need to do is to display the desired .row2 as a flex container box and then align all its flex items (the columns) vertically by align-items property.

EXAMPLE HERE (Please read the comments with care)

<div class="container">
    <div class="row vertical-align"> <!--
                    ^--  Additional class -->
        <div class="col-xs-6"> ... </div>
        <div class="col-xs-6"> ... </div>
.vertical-align {
    display: flex;
    align-items: center;

The Output

Vertical aligned columns in Twitter Bootstrap

Colored area displays the padding-box of columns.

Clarifying on align-items: center

8.3 Cross-axis Alignment: the align-items property

Flex items can be aligned in the cross axis of the current line of the flex container, similar to justify-content but in the perpendicular direction. align-items sets the default alignment for all of the flex container’s items, including anonymous flex items.

align-items: center; By center value, the flex item’s margin box is centered in the cross axiswithin the line.

Big Alert

Important note #1: Twitter Bootstrap doesn't specify the width of columns in extra small devices unless you give one of .col-xs-# classes to the columns.

Therefore in this particular demo, I have used .col-xs-* classes in order for columns to be displayed properly in mobile mode, because it specifies the width of the column explicitly.

But alternatively you could switch off the Flexbox layout simply by changing display: flex; to display: block; in specific screen sizes. For instance:

/* Extra small devices (767px and down) */
@media (max-width: 767px) {
    .row.vertical-align {
        display: block; /* Turn off the flexible box layout */

Or you could specify .vertical-align only on specific screen sizes like so:

/* Small devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .row.vertical-align {
        display: flex;
        align-items: center;

In that case, I'd go with @KevinNelson's approach.

Important note #2: Vendor prefixes omitted due to brevity. Flexbox syntax has been changed during the time. The new written syntax won't work on older versions of web browsers (but not that old as Internet Explorer 9! Flexbox is supported on Internet Explorer 10 and later).

This means you should also use vendor-prefixed properties like display: -webkit-box and so on in production mode.

If you click on "Toggle Compiled View" in the Demo, you'll see the prefixed version of CSS declarations (thanks to Autoprefixer).

Full-height columns with vertical aligned contents

As you see in the previous demo, columns (the flex items) are no longer as high as their container (the flex container box. i.e. the .row element).

This is because of using center value for align-items property. The default value is stretch so that the items can fill the entire height of the parent element.

In order to fix that, you can add display: flex; to the columns as well:

EXAMPLE HERE (Again, mind the comments)

.vertical-align {
  display: flex;
  flex-direction: row;

.vertical-align > [class^="col-"],
.vertical-align > [class*=" col-"] {
  display: flex;
  align-items: center;     /* Align the flex-items vertically */
  justify-content: center; /* Optional, to align inner flex-items
                              horizontally within the column  */

The Output

Full-height columns with vertical aligned contents in Twitter Bootstrap

Colored area displays the padding-box of columns.

Last, but not least, notice that the demos and code snippets here are meant to give you a different idea, to provide a modern approach to achieve the goal. Please mind the "Big Alert" section if you are going to use this approach in real world websites or applications.

For further reading including browser support, these resources would be useful:

  • Mozilla Developer Network - Flexible boxes
  • Guide To Flexbox - CSS Tricks
  • HTML5Rocks - Flexbox quick
  • SmashingMagazine - Centering Elements with Flexbox
  • Philip Walton - Solved By Flexbox
  • Can I Use: Flexible Box Layout Module

Leave a Comment

1 . Contain form within a bootstrap popover?

Answer :

JS Code:

    html : true,
    title: function() {
      return $("#popover-head").html();
    content: function() {
      return $("#popover-content").html();

HTML Markup:

<a href="#" id="popover">the popover link</a>
<div id="popover-head" class="hide">
  some title
<div id="popover-content" class="hide">
  <!-- MyForm -->


Alternative Approaches:


You might want to take a look at X-Editable. A library that allows you to create editable elements on your page based on popovers.

X-Editable demo


Mike Costello has released Bootstrap Web Components. This nifty library has a Popovers Component that lets you embed the form as markup:

<button id="popover-target" data-original-title="MyTitle" title="">Popover</button>

<bs-popover title="Popover with Title" for="popover-target">
  <!-- MyForm -->

2 . Bootstrap won't detect jQuery 1.11.0 - Uncaught Error: Bootstrap's JavaScript requires jQuery?

Answer :

If you're in a Browser-Only environment, use @SridharR's solution.

If you're in a Node/CommonJS + Browser environment (e.g. electron, node-webkit, etc..); the reason for this error is that jQuery's export logic first checks for module, not window:

if (typeof module === "object" && typeof module.exports === "object") {
    // CommonJS/Node
} else {
    // window

Note that it exports itself via module.exports in this case; so jQuery and $ are not assigned to window.

So to resolve this, instead of <script src="path/to/jquery.js"></script>;

Simply assign it yourself by a require statement:

    window.jQuery = window.$ = require('jquery');

NOTE: If your electron app does not need nodeIntegration, set it to false so you won't need this workaround.

3 . Bootstrap dropdown closing when clicked?

Answer :

You can omit the dropdown call all together, the bootstrap dropdown works without it. Make sure you're wrapping your script properly, you can include it on the header or body of your page, although personally i prefer placing it on the body of your page.


<script type="text/javascript">
    $('.dropdown-menu input, .dropdown-menu label').click(function(e) {

4 . span style="font-size:14px">Twitter bootstrap grid system. Spacing between columns?

Answer :

You could try spacing the boxes with padding.

<div class="col-md-6 box">
        <div class="inner">Hello</div>
<div class="col-md-6 box">
        <div class="inner">Hello</div>


.box {
    padding: 0 5px 0 5px;
.box .inner {
    background-color: #fff;

5 . How to add a search box with icon to the navbar in Bootstrap 3?

Answer :

I'm running BS3 on a dev site and the following produces the affect/layout you're requesting. Of course you'll need the glyphicons set up in BS3.

<div class="navbar navbar-inverse navbar-static-top" role="navigation">

    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <a class="navbar-brand" rel="home" href="/" title="Aahan Krish's Blog - Homepage">ITSMEEE</a>

    <div class="collapse navbar-collapse navbar-ex1-collapse">

        <ul class="nav navbar-nav">
            <li><a href="/topic/notes/">/notes</a></li>
            <li><a href="/topic/dev/">/dev</a></li>
            <li><a href="/topic/good-reads/">/good-reads</a></li>
            <li><a href="/topic/art/">/art</a></li>
            <li><a href="/topic/bookmarks/">/bookmarks</a></li>
            <li><a href="/all-topics/">/all</a></li>

        <div class="col-sm-3 col-md-3 pull-right">
        <form class="navbar-form" role="search">
        <div class="input-group">
            <input type="text" class="form-control" placeholder="Search" name="srch-term" id="srch-term">
            <div class="input-group-btn">
                <button class="btn btn-default" type="submit"><i class="glyphicon glyphicon-search"></i></button>


6 . Bootstrap 3.0 - Fluid Grid that includes Fixed Column Sizes?

Answer :

 had a slightly different problem:

  • I needed to combine fixed and fluid columns as part of a table rather than as part of a full-window layout
  • I needed to have columns fixed to both the left and right
  • I was not worried about the column backgrounds using the full-height of the containing row

As a result, I resorted to float to for the left and right columns, and could then use Bootstrap's row to do the fluid columns in between.

    <div class="pull-left" style="width:240px">Fixed 240px</div>
    <div class="pull-right" style="width:120px">Fixed 120px</div>
    <div style="margin-left:240px;margin-right:120px">
        <div class="row" style="margin:0px">
            Standard grid system content here

7 . Twitter Bootstrap modal: How to remove Slide down effect?

Answer :

I believe that most of these answers are for bootstrap 2. I ran into the same issue for bootstrap 3 and wanted to share my fix. Like my previous answer for bootstrap 2, this will still do an opacity fade, but will NOT do the slide transition.

You can either change the modals.less or the theme.css files, depending on your workflow. If you haven't spent any quality time with less, I'd highly recommend it.

for less, find the following code in MODALS.less

&.fade .modal-dialog {
  .translate(0, -25%);
  .transition-transform(~"0.3s ease-out");
&.in .modal-dialog { .translate(0, 0)}

then change the -25% to 0%

Alternatively, if you're using just the css, find the following in theme.css:

.modal.fade .modal-dialog {
  -webkit-transform: translate(0, -25%);
  -ms-transform: translate(0, -25%);
  transform: translate(0, -25%);
  -webkit-transition: -webkit-transform 0.3s ease-out;
  -moz-transition: -moz-transform 0.3s ease-out;
  -o-transition: -o-transform 0.3s ease-out;
  transition: transform 0.3s ease-out;

and then change the -25% to 0%.

8 . How to hide element using twitter bootstrap 3 and show it using jQuery?

Answer :

First, don't use .hideUse .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 showhidden and invisible are in the docs.

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

9 . Bootstrap 3 Glyphicons CDN?

Answer :

An alternative would be to use Font-Awesome for icons:

Including Font-Awesome

Open Font-Awesome on CDNJS and copy the CSS url of the latest version:

<link rel="stylesheet" href="<url>">

Or in CSS

@import url("<url>");

For example (note, the version will change):

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">


<i class="fa fa-bed"></i>

It contains a lot of icons!

10 . Bootstrap 3.0 Button in Navbar?

Answer :

With bootstrap 3, it is still possible to have a <a>link rendered as a button, but you have to include them into a <form>. Also, the <a> should include the navbar-btn class.

    <a href="#" class="btn btn-primary btn-sm navbar-btn">

11 . How to make a whole row in a table clickable as a link?

Answer :

You could include an anchor inside every <td>, like so:

  <td><a href="#">Blah Blah</a></td>
  <td><a href="#">1234567</a></td>
  <td><a href="#">more text</a></td>

You could then use display:block; on the anchors to make the full row clickable.

tr:hover { 
   background: red; 
td a { 
   display: block; 
   border: 1px solid black;
   padding: 16px; 

Example jsFiddle here.

This is probably about as optimum as you're going to get it unless you resort to JavaScript.

12 . How to overwrite styling in Twitter Bootstrap?

Answer :

The answer to this is CSS Specificity. You need to be more "specific" in your CSS so that it can override bootstrap css properties.

For example you have a sample code for a bootstrap menu here:

<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
    <div id="home-menu-container" class="collapse navbar-collapse">
        <ul id="home-menu" class="nav navbar-nav">
            <li><a class="navbar-brand" href="#"><img src="images/xd_logo.png" /></a></li>
            <li><a href="#intro">Home</a></li>
            <li><a href="#about">About Us</a></li>
            <li><a href="#services">What We Do</a></li>
            <li><a href="#process">Our Process</a><br /></li>
            <li><a href="#portfolio">Portfolio</a></li>
            <li><a href="#contact">Contact Us</a></li>
    </div><!-- /.navbar-collapse -->

Here, you need to remember the hierarchy of the specificity. It goes like this:

  • Give an element with an id mentioned 100 points
  • Give an element with a class mentioned 10 points
  • Give a simple element a single 1 point

So, for the above if your css has something like this:

.navbar ul li a { color: red; } /* 10(.navbar) + 1(ul) + 1(li) + 1(a) = 13 points */
.navbar a { color: green; } /* 10(.navbar) + 1(a) = 11 points */

So, even if you have defined the .navbar a after .navbar ul li a it is still going to override with a red colour, instead of a green since the specificity is more (13 points).

So, basically all you need to do is calculate the points for the element you are wanting to change the css for, via inspect element on your browser. Here, bootstrap has specified its css for the element as

.navbar-inverse .navbar-nav>li>a { /* Total = 22 points */
    color: #999;

So, even if your css is loading is being loaded after bootstrap.css which has the following line:

.navbar-nav li a {
    color: red;

it's still going to be rendered as #999. In order to solve this, bootstrap has 22 points (calculate it yourself). So all we need is something more than that. Thus, I have added custom IDs to the elements i.e. home-menu-container and home-menu. Now the following css will work:

#home-menu-container #home-menu li a { color: red; } /* 100 + 100 + 1 + 1 = 202 points :) */

13 . Decreasing height of bootstrap 3.0 navbar?

Answer :

Bootstrap 3.0 by default has a 15px padding on top and bottom, so we just need to override it!

For example:

.navbar-nav > li > a {padding-top:10px !important; padding-bottom:10px !important;}
.navbar {min-height:40px !important}

14 . Bootstrap 3.0 Popovers and tooltips?

Answer :

For some reason the only way I was able to get my code to work is by switching couple of things. If nothing worked for you so far, please give a whirl to this:

    selector: '[data-toggle="popover"]', 
    trigger: 'hover',
    placement: 'right'

15 . Can you disable tabs in Bootstrap?

Answer :

I added the following Javascript to prevent clicks on disabled links:

$(".nav-tabs a[data-toggle=tab]").on("click", function(e) {
  if ($(this).hasClass("disabled")) {
    return false;