Such scripts may execute either before the DOM has been fully constructed or after the DOMContentLoaded event.įollowing is an example of specifying a loading strategy during script enqueuing: Asynchronous scripts do not have a guaranteed execution order, as script B (although added to the DOM after script A) may execute first given that it may complete loading prior to script A. Scripts marked for asynchronous execution - via the async script attribute - are executed as soon as they are loaded by the browser.Added by specifying an array key value pair of 'strategy' => 'async' to the $args parameter.Deferred scripts are executed in the same order they were printed/added in the DOM, unlike asynchronous scripts. Scripts marked for deferred execution - via the defer script attribute - are only executed once the DOM tree has fully loaded (but before the DOMContentLoaded and window load events).Added by specifying an array key value pair of 'strategy' => 'defer' to the $args parameter.See the sections to follow for more information. This is the recommended method of linking JavaScript to a WordPress generated page.Īs of WordPress 6.3, the new $args parameter – that replaces/overloads the prior $in_footer parameter – can be used to specify a script loading strategy. You could either link a script with a handle previously registered using the wp_register_script() function, or provide this function with all the parameters necessary to link a script. Links a script file to the generated page at the right time according to the script dependencies, if the script has not been already included and if all the dependencies have been registered. Wp_enqueue_script( $handle, $src, $deps, $ver, $args ) Whether to print the script in the footer. By default, it will apply the snippet to all posts or pages in the entire site.Optional. The wp_head hook will insert JavaScript code into your site’s header section. You can also choose whether to apply the snippet sitewide or insert it on a specific page. To add JavaScript to your WordPress site, use the wp_head and wp_footer hooks. Otherwise, you can also include JavaScript in the header or footer using the Insert Headers and Footers plugin. Press the Activation toggle and click Save Snippet.For example, we will add a script that shows a welcome message window. Write your code in the Code Preview field.Select JavaScript Snippet from the Code Type drop-down menu. Since we are adding a custom script, hover over Add Your Custom Code (New Snippet) and click Use Snippet. Click the Code Snippet menu from your WordPress dashboard sidebar.
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