jQuery for Web Designers
Illustration by John Hersey

jQuery for Web Designers

with Joe Chellman

Video: How to install jQuery

Now let's look at how to install jQuery. There's two ways that we can actually put them together. So let's go over what the two ways are first. One way is to call jQuery directly from a content distribution network. Content distribution network basically just means somewhere on the internet that is hosting jQuery for you. Generally, these are going to be websites that have much faster infrastructure than you have, so jQuery should download a lot faster. One other nice thing is that if you're using a CDN, other websites also use this method. So, your visitor might have gone to a website that uses that same copy of jQuery that you, yourself, are linking to.
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  1. 2m 17s
    1. Welcome
      1m 4s
    2. What you should know
      37s
    3. Using the exercise files
      36s
  2. 11m 59s
    1. jQuery is a JavaScript library?
      1m 15s
    2. When to use jQuery
      2m 51s
    3. Alternatives to jQuery
      1m 24s
    4. Which version of jQuery to use
      1m 50s
    5. How to install jQuery
      3m 21s
    6. Reference materials
      1m 18s
  3. 19m 19s
    1. Getting ready
      2m 26s
    2. Selecting elements to use
      3m 54s
    3. Performing multiple operations on the same line with chaining
      2m 30s
    4. Using classes to find what you're looking for
      3m 52s
    5. Adding, modifying, and removing content dynamically
      4m 3s
    6. Challenge: Form feedback
      1m 12s
    7. Solution: Form feedback
      1m 22s
  4. 18m 28s
    1. Triggering a change based on activity with event binding
      4m 37s
    2. Reading and changing values
      4m 17s
    3. Working with HTML attributes
      4m 55s
    4. Challenge: Dynamic contact form
      1m 27s
    5. Solution: Dynamic contact form
      3m 12s
  5. 16m 42s
    1. Using the Colorbox plugin to build a slideshow gallery
      4m 22s
    2. Implementing Colorbox on your site
      2m 46s
    3. Changing Colorbox options
      5m 53s
    4. Challenge: Convert to a slideshow
      1m 6s
    5. Solution: Convert to a slideshow
      2m 35s
  6. 28m 37s
    1. Using jQuery or CSS to animate elements
      2m 24s
    2. Creating simple jQuery animations
      4m 35s
    3. Animating numeric properties with animate()
      4m 56s
    4. Understanding animation easing
      4m 4s
    5. Putting it together: Flowers in the cart
      6m 4s
    6. Callbacks: What to do when the animation ends
      3m 27s
    7. Challenge: Improve the animation
      1m 3s
    8. Solution: Improve the animation
      2m 4s
  7. 4m 45s
    1. More fun plugins
      2m 38s
    2. What's next: More jQuery
      50s
    3. What's next: More JavaScript
      1m 17s

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Watch the Online Video Course jQuery for Web Designers
1h 42m Intermediate Oct 31, 2013

Viewers: in countries Watching now:

Take the next step in your web design career with jQuery, which amplifies JavaScript's power and puts a library of prebuilt functions and a diverse selection of plugins at web designers' fingertips. This course explains what jQuery is, how to install it, and use it to script more interesting, interactive websites. Author Joe Chellman will show you how to use jQuery to add web form usability, audio and video, animation, and other features like slideshow galleries to your existing HTML and CSS-based webpages.

Check out JavaScript for Web Designers for more detailed instruction on JavaScript.

Topics include:
  • What is jQuery?
  • Installing jQuery
  • Performing multiple operations with chaining
  • Using classes
  • Adding, modifying, and removing content dynamically
  • Triggering a change with event binding
  • Creating a dynamic contact form
  • Building a slideshow gallery
  • Creating simple jQuery animations
Subject:
Web
Software:
jQuery
Author:
Joe Chellman

How to install jQuery

Now let's look at how to install jQuery. There's two ways that we can actually put them together. So let's go over what the two ways are first. One way is to call jQuery directly from a content distribution network. Content distribution network basically just means somewhere on the internet that is hosting jQuery for you. Generally, these are going to be websites that have much faster infrastructure than you have, so jQuery should download a lot faster. One other nice thing is that if you're using a CDN, other websites also use this method. So, your visitor might have gone to a website that uses that same copy of jQuery that you, yourself, are linking to.

Therefore your visitor's browser would already have cached that same copy. So when they visit your site, there might not be any need to download jQuery at all. You can also install your own copy, and you have to do this if you're working without an Internet connection. If you want to work with jQuery on your own machine, not connected to the Internet, this is the only way you can do it. Now the best way that you could work with this potentially is to use both at the same time. So, let's see how we can do that. So, here I am on jquery.com. There's a bright candy like button here to let me download a copy but also at the bottom of every page. Here's the quick access CDN method and this gives me a link to the Google CDN with the latest copy of jQuery 1, so you can copy this, but also let's look at the download area.

Here are the two versions of jQuery that you would be interested in. One is the compressed production version. If you're just going to grab jQuery and use it, without actually looking at the code, just get this one. If you want to open up jQuery and look at it, and see how it works, you can download the uncompressed development version. But I wouldn't recommend using that in a production environment, when you launch your website live. You'll want the tinier version that'll download faster. But as I say, we can combine these methods. So, after you've downloaded the file, here's how this will work. Here I have a stub HTML file and there's really nothing going on here except for this.

First, I'm calling up jQuery using that Google CDN. Adjust my script tag with the source attributes set to the right location. I've spelled out the HTTP here because when I'm just previewing files in my browser, like this, the protocol is file. This is not HTTP so when I'm using this, I can't use this initial double slash the way they have here. This only works when your file is actually on the internet and your browser can figure out whether to use HTTP or HTTPS, that is a non-secure or secure connection automatically, as appropriate.

When you're working on your own computer and just dropping files into the browser like this. You have to spell out the http, so your browser knows to go out and grab the file from the Internet. So I have the script tag, calling jQuery from the Internet, and then I have this as a fall back. So what we're looking at here is whether jQuery is defined and if not, that is or. We let Javascript write out a call to the local location. So, let's refer to the exercise files. So, here are my exercise files on the desktop, and this is the Install.html that we were just looking at in the browser, and here's my copy of jQuery.

They're sitting side-by-side in this folder. So, here my little script tag just calls for jQuery.win.js, right from the same location. So, what happens is, I load jQuery from the internet and then if it's defined, that is, if this actually works, then nothing else happens and I'm just using jQuery from the internet. But if that's not true, if this doesn't work for any reason and therefore the jQuery property of window. That is the global jQuery variable is not defined, then we use the local copy and jQuery will work. So when you want to install jQuery you can do it anyway that you want, but this way will give you what I think is the best of both worlds.

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