Html – Get width and height of screen window and height of div jquery

appendbrowserbrowser-widthhtmljquery

In plain English this is the jQuery functionality i'm after:

I need to get the width and the height of the browser window and then get the height of .banner div (height is automatic). If the height of .banner div is higher than that of the height of the browser window append .title div and .social div to the body otherwise display .title div and .social div within .banner div.

How do I then style the two divs accordingly (.title and .social)?

EDIT:
This is my on page load code in HTML:

<div class="banner">
   <div class="title">
      <!--to be positioned 40px from the left-->
   </div>
   <div class="social">
      <!--to be positioned 40px from the right-->
   </div>

   <img src="URL"/> <!-- Image determines height of DIV uses max-width -->

</div>

Best Answer

You can do something like below:

var windowHeight = $(window).height(); //Gives you the browser viewport height
var bannerHeight = $(".banner").height();

if (bannerHeight > windowHeight) {
    $("body").append($('.title'));
    $("body").append($('.social'));

    //Then you can style them using jQuery .css
    //Example
    $('.title').css('color', 'red');
}
else {
    //Display .title and .social in your .banner div
}

jQuery .height info: http://api.jquery.com/height/
jQuery .css info: http://api.jquery.com/css/

2015 update: the flexbox approach

There are two other answers briefly mentioning flexbox; however, that was more than two years ago, and they don't provide any examples. The specification for flexbox has definitely settled now.

Note: Though CSS Flexible Boxes Layout specification is at the Candidate Recommendation stage, not all browsers have implemented it. WebKit implementation must be prefixed with -webkit-; Internet Explorer implements an old version of the spec, prefixed with -ms-; Opera 12.10 implements the latest version of the spec, unprefixed. See the compatibility table on each property for an up-to-date compatibility status.

(taken from https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes)

All major browsers and IE11+ support Flexbox. For IE 10 or older, you can use the FlexieJS shim.

To check current support you can also see here: http://caniuse.com/#feat=flexbox

Working example

With flexbox you can easily switch between any of your rows or columns either having fixed dimensions, content-sized dimensions or remaining-space dimensions. In my example I have set the header to snap to its content (as per the OPs question), I've added a footer to show how to add a fixed-height region and then set the content area to fill up the remaining space.

html,
body {
  height: 100%;
  margin: 0;
}

.box {
  display: flex;
  flex-flow: column;
  height: 100%;
}

.box .row {
  border: 1px dotted grey;
}

.box .row.header {
  flex: 0 1 auto;
  /* The above is shorthand for:
  flex-grow: 0,
  flex-shrink: 1,
  flex-basis: auto
  */
}

.box .row.content {
  flex: 1 1 auto;
}

.box .row.footer {
  flex: 0 1 40px;
}

<!-- Obviously, you could use HTML5 tags like `header`, `footer` and `section` -->

<div class="box">
  <div class="row header">
    <p><b>header</b>
      <br />
      <br />(sized to content)</p>
  </div>
  <div class="row content">
    <p>
      <b>content</b>
      (fills remaining space)
    </p>
  </div>
  <div class="row footer">
    <p><b>footer</b> (fixed height)</p>
  </div>
</div>

In the CSS above, the flex property shorthands the flex-grow, flex-shrink, and flex-basis properties to establish the flexibility of the flex items. Mozilla has a good introduction to the flexible boxes model.

Javascript – Using jQuery to center a DIV on the screen

I like adding functions to jQuery so this function would help:

jQuery.fn.center = function () {
    this.css("position","absolute");
    this.css("top", Math.max(0, (($(window).height() - $(this).outerHeight()) / 2) + 
                                                $(window).scrollTop()) + "px");
    this.css("left", Math.max(0, (($(window).width() - $(this).outerWidth()) / 2) + 
                                                $(window).scrollLeft()) + "px");
    return this;
}

Now we can just write:

$(element).center();

Demo: Fiddle (with added parameter)

Best Answer

Related Solutions

Html – Make a div fill the height of the remaining screen space

2015 update: the flexbox approach

Working example

Javascript – Using jQuery to center a DIV on the screen

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