JavaScript & AJAX in WordPress

Jan 25, 20181 like189 views

This document outlines a WordPress webinar about JavaScript and AJAX presented by Igor Benić, a WordPress developer and educator. The webinar will cover including JavaScript in WordPress, creating global JavaScript objects, how AJAX works in WordPress, and an example of front-end form submission. Attendees can learn more from Igor Benić through an online course on becoming a WordPress developer or by becoming a member of his website.

• Including JavaScript in WordPress
• Creating Global JavaScript Objects
• How AJAX works in WordPress
• Example: Front Form Submission
JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
Summary

wp-includes/functions.wp-scripts.php
wp_register_script (
$handle, // Unique String (can be used to dequeue it).
$src = '', // HTTP(S) source to the script
$deps = array(), // Dependancies, such as jquery. Using registered handles
$ver = false, // Version.
$in_footer = false // Include it in footer?
);
wp_enqueue_script( … ) - $handle is required. Must be registered before if
only $handle is passed.
wp_add_inline_script( $handle, $data, $position = ‘after’ ); //$data should not
contain <script>. Just JavaScript. $handle must be enqueued before.
JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
Including JavaScript in WordPress

Front
add_action( ‘wp_enqueue_scripts’,
‘function_that_calls_enqueue_functions’);
Admin
add_action( ‘admin_enqueue_scripts’,
‘function_that_calls_enqueue_functions’);
JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
Including JavaScript in WordPress

wp_localize_script(
$handle, // Registered/Enqueued Handle
$object_name, // Object name used in JavaScript
$l10n // Array of key => value pairs
);
—
PHP:
wp_localize_script( ‘my-script’, ‘wp_webinar’, array( ‘load_text’ =>
__( ‘Loading…’, ‘textdomain’ ) );
JS:
$(button).html( wp_webinar.load_text ); //Button will show now: Loading…
JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
Creating Global JavaScript Objects

wp-admin/admin-ajax.php
No ‘action’ in $_REQUEST ($_POST, $_GET) - Response: 0.
If user logged in:
do_action( ‘wp_ajax_’ . $_REQUEST[‘action’] );
If not logged in (Regular visitor):
do_action( ‘wp_ajax_nopriv_’ . $_REQUEST[‘action’] );
JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
How AJAX Works in WordPress

$Our Job as a Developer: PHP: add_action( ‘wp_ajax_our_action’, ‘function_to_be_called’ ); // Should this be available to regular visitors? add_action( ‘wp_ajax_no_priv_our_action’, ‘function_to_be_called’ ); JS: // jQuery AJAX $.ajax(url:URL_TO_admin-ajax.php, data: { action: ‘our_action’, …// other data to be passed }, …); JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com How AJAX Works in WordPress$

JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
Let’s Code

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Or become a member on my site - $3/month
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JavaScript & AJAX
WordPress Webinar
@igorbenic | ibenic.com
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JavaScript & AJAX in WordPress

1. JavaScript & AJAX WordPress Webinar

2. Igor Benić WordPress Developer & Educator WP.org: proﬁles.wordpress.org/ibenic Twitter: @igorbenic Web: https://www.ibenic.com Plugins: Simple Giveaways, Live Scores for SportsPress, EDD Tab Manager and more Books: WooCommerce for Developers, Easy Digital Downloads for Developers, Beginners’ Guide to WordPress Customizer JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com

3. • Including JavaScript in WordPress • Creating Global JavaScript Objects • How AJAX works in WordPress • Example: Front Form Submission JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com Summary

4. wp-includes/functions.wp-scripts.php wp_register_script ( $handle, // Unique String (can be used to dequeue it). $src = '', // HTTP(S) source to the script $deps = array(), // Dependancies, such as jquery. Using registered handles $ver = false, // Version. $in_footer = false // Include it in footer? ); wp_enqueue_script( … ) - $handle is required. Must be registered before if only $handle is passed. wp_add_inline_script( $handle, $data, $position = ‘after’ ); //$data should not contain <script>. Just JavaScript. $handle must be enqueued before. JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com Including JavaScript in WordPress

5. Front add_action( ‘wp_enqueue_scripts’, ‘function_that_calls_enqueue_functions’); Admin add_action( ‘admin_enqueue_scripts’, ‘function_that_calls_enqueue_functions’); JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com Including JavaScript in WordPress

6. wp_localize_script( $handle, // Registered/Enqueued Handle $object_name, // Object name used in JavaScript $l10n // Array of key => value pairs ); — PHP: wp_localize_script( ‘my-script’, ‘wp_webinar’, array( ‘load_text’ => __( ‘Loading…’, ‘textdomain’ ) ); JS: $(button).html( wp_webinar.load_text ); //Button will show now: Loading… JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com Creating Global JavaScript Objects

7. wp-admin/admin-ajax.php No ‘action’ in $_REQUEST ($_POST, $_GET) - Response: 0. If user logged in: do_action( ‘wp_ajax_’ . $_REQUEST[‘action’] ); If not logged in (Regular visitor): do_action( ‘wp_ajax_nopriv_’ . $_REQUEST[‘action’] ); JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com How AJAX Works in WordPress

8. Our Job as a Developer: PHP: add_action( ‘wp_ajax_our_action’, ‘function_to_be_called’ ); // Should this be available to regular visitors? add_action( ‘wp_ajax_no_priv_our_action’, ‘function_to_be_called’ ); JS: // jQuery AJAX $.ajax(url:URL_TO_admin-ajax.php, data: { action: ‘our_action’, …// other data to be passed }, …); JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com How AJAX Works in WordPress

9. JavaScript & AJAX WordPress Webinar @igorbenic | ibenic.com Let’s Code

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