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Integrating jQuery functionality

From: Dreamweaver and WordPress: Core Concepts

Video: Integrating jQuery functionality

While there are more than a few advanced web widgets and effects that use the Spry JavaScript framework, there are thousands that use jQuery, the most popular JavaScript framework. Many WordPress widgets and plug-ins rely on jQuery, and as you'll see in the chapter using WordPress plug-ins, they are drag and drop simple to use. However, if you just want to include a little custom jQuery code, you'll need to take a few extra steps. To illustrate the process, let's draw a little attention to our Newsletter Sign Up form by making it fade in when the page first loads.

Integrating jQuery functionality

While there are more than a few advanced web widgets and effects that use the Spry JavaScript framework, there are thousands that use jQuery, the most popular JavaScript framework. Many WordPress widgets and plug-ins rely on jQuery, and as you'll see in the chapter using WordPress plug-ins, they are drag and drop simple to use. However, if you just want to include a little custom jQuery code, you'll need to take a few extra steps. To illustrate the process, let's draw a little attention to our Newsletter Sign Up form by making it fade in when the page first loads.

In a standard Dreamweaver page, the first step for adding jQuery functionality is to include the library, either from a self-hosted file or a content delivery network, also known as a CDM, but WordPress already includes jQuery. It's actually used in the dashboard as well as a good number of other framework scripts. All you need to do is to invoke the desired framework, or as they say in WordPress speak, enqueue. Here's one way to do it.

Let's open up our header.php file from the roux theme, and I'm going to put this code right above the WordPress function wp_head. This will go in its own PHP code block, and we'll use the WordPress function enqueue. Now I'm going to bring up code hint that we set up with our site-specific code hinting earlier so that I can make sure to spell enqueue correctly, which is not the easiest word. And here is what we want, enqueue_scripts. So I'm going to go to the second one here.

So now before I put in jQuery in the center of those parentheses, I want to be sure to get rid of the trailing S here, because really what I'm doing is just wp_enqueue_script. So, now I'll add in my quotes and put jquery, lowercase, in there. So I'll save my header.php page. Now that jQuery's all queued up, what's next? Well, next we'll add in the specific jQuery code for whatever functionality we want to set up.

The current best practice regarding JavaScript is to insert your code just before the end of the page, which in WordPress means the footer page. Now we don't want this little bit of jQuery magic we're working with to run on every page just those using the events template. So let's create a custom footer for just that page and put our jQuery code there. I'll expand the Files panel and select my footer.php page that's in the roux folder, press Command+D to duplicate it and then rename footer-copy as footer-events.

Once that's renamed, I'll open it up, collapse the Files panel, let's go into Code view it make it a little bit easier, and scroll all the way down to the bottom of the page. Now I'm going to put my script tag right above the wp_footer rule, and this is a standard script tag with a type of text/javascript, and within it is the jQuery call.

Now the syntax for this is a little bit different than your normal jQuery colon. I'll point out what is different. Typically, you start with a document.ready function envelope, and this will be about the same but just a slight tweak. So instead of starting with document.ready, we start with jQuery and then add the document.ready. So it's (document).ready and they we'll open a parentheses again, put in function and then another open parenthesis.

Now typically, this parenthesis is left empty, but to allow the code within WordPress to recognize the dollar sign syntax that we'll be using, we put it in a dollar sign. So the two differences really are just adding jQuery to the start of this line and putting a dollar sign in your parentheses following function. All right. So let's go ahead and put our first opening curly brace here, and let's put in the first of two lines. We'll put in a dollar sign so that we can identify our selector which is going to be the fieldset tag and then encase that in quotes and also parentheses and then .css because we're going to change the CSS property, and the CSS property we are going to change is the display property.

So I'll put that in quotes as well, followed by a comma and then the property we're setting it to, which is none. So basically what this is saying is when the page first loads, hide the fieldset. Now let's display it. So I'm just going to copy that first selector there, all the way up to and including the dot, and then on the next line paste it in and then we'll call a jQuery function, fadeIn, and give it a value of 2000.

So that's 2 seconds and close it all out with a semicolon, and then let's close off our curly braces as well as the parentheses and the final semicolon. Okay, that's all good. We'll save this page, footer_events.php. Now we are ready to tie footer_events.php to the events template. So I'm going to go over to my events.php page, scroll down to the bottom where we have get_footer on line 84, and rather than have the generic get_footer empty parentheses, let's add in two single quotes and put in our template name which is events.

Believe it or not, we are done, it's that simple. So I'll save the page, and let's run it through its paces and see how it looks. I'll go back over to Dreamweaver, go into Design view, and let me scroll down just a little bit so we see our form. I'll hit Refresh. And when the page loads, our Sign Up for Newsletter is not there and then it fades in. While it works in Dreamweaver, it's not quite as smooth as it will appear in the browser. So everything's working as expected.

Of course, this is just the bare minimum of what you can do with jQuery in WordPress. Keep in mind that if you want to work with other jQuery libraries, like jQuery UI, you'll need to enqueue that script as well.

Show transcript

This video is part of

Image for Dreamweaver and WordPress: Core Concepts
Dreamweaver and WordPress: Core Concepts

55 video lessons · 51694 viewers

Joseph Lowery
Author

 
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  1. 4m 7s
    1. Welcome
      58s
    2. Using the exercise files
      1m 54s
    3. A word about updates
      1m 15s
  2. 15m 28s
    1. Overview
      1m 51s
    2. Creating the database and the initial site
      3m 45s
    3. Configuring WordPress
      5m 54s
    4. Establishing a Dreamweaver site
      3m 58s
  3. 20m 18s
    1. Accessing dynamically related files
      4m 12s
    2. Filtering files
      4m 20s
    3. Following links
      4m 15s
    4. Employing Live Code
      2m 54s
    5. Enabling site-specific code hinting
      4m 37s
  4. 21m 8s
    1. Adding blog posts
      4m 55s
    2. Editing blog posts
      3m 20s
    3. Adding new pages
      2m 59s
    4. Including images
      6m 59s
    5. Adding videos to posts
      2m 55s
  5. 18m 12s
    1. Understanding WordPress structure
      3m 52s
    2. Activating a theme
      7m 21s
    3. Setting up a child theme
      6m 59s
  6. 1h 29m
    1. Updating the page structure and the background
      12m 53s
    2. Working with web fonts
      4m 3s
    3. Styling a header
      11m 48s
    4. Adding header functions
      7m 40s
    5. Setting up content columns
      10m 9s
    6. Changing the main content
      5m 17s
    7. Managing the content code
      4m 48s
    8. Customizing the sidebar
      10m 32s
    9. Styling search
      7m 8s
    10. Working with search text
      5m 49s
    11. Integrating the footer
      9m 40s
  7. 27m 18s
    1. Setting up media queries
      6m 12s
    2. Customizing for tablets
      12m 19s
    3. Building smartphone layouts
      8m 47s
  8. 23m 28s
    1. Working with categories and posts
      5m 31s
    2. Developing category-driven pages
      11m 22s
    3. Changing headers by category
      6m 35s
  9. 36m 32s
    1. Adding Spry accordion panels
      17m 44s
    2. Working with Spry form validation
      11m 56s
    3. Integrating jQuery functionality
      6m 52s
  10. 11m 7s
    1. Understanding WordPress plugins
      6m 20s
    2. Styling plugin output
      4m 47s
  11. 25m 44s
    1. Customizing the Dashboard
      6m 52s
    2. Working with WordPress functions
      8m 7s
    3. Including administration interactivity
      10m 45s
  12. 13m 10s
    1. Setting up the data in WordPress
      2m 17s
    2. Adding dynamic data from WordPress to your web pages
      10m 53s
  13. 11m 38s
    1. Modifying general settings
      4m 12s
    2. Setting up users
      3m 11s
    3. Restricting access to specific WordPress pages
      4m 15s
  14. 26m 38s
    1. Exporting and importing WordPress files
      7m 9s
    2. Backing up and restoring the database
      8m 10s
    3. Transferring files
      6m 3s
    4. Testing and fine-tuning
      5m 16s
  15. 18s
    1. Next steps
      18s

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