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defer-javascript-load-in-wordpress.code-snippets.xml
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defer-javascript-load-in-wordpress.code-snippets.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a code snippets export file generated by the Code Snippets WordPress plugin. -->
<!-- https://wordpress.org/plugins/code-snippets -->
<!-- To import these snippets a WordPress site follow these steps: -->
<!-- 1. Log in to that site as an administrator. -->
<!-- 2. Install the Code Snippets plugin using the directions provided at the above link. -->
<!-- 3. Go to 'Tools: Import' in the WordPress admin panel. -->
<!-- 4. Click on the "Code Snippets" importer in the list -->
<!-- 5. Upload this file using the form provided on that page. -->
<!-- 6. Code Snippets will then import all of the snippets and associated information contained in this file into your site. -->
<!-- 7. You will then have to visit the 'Snippets: All Snippets' admin menu and activate desired snippets. -->
<!-- generator="Code Snippets/2.8.6" created="2017-07-21 15:39" -->
<snippets>
<snippet scope="2">
<name>Defer JavaScript load in WordPress</name>
<desc></desc>
<tags>javascript, scripts, load, performance, defer</tags>
<code>/*Function to defer load scripts*/
function js_async_attr($tag){
# Do not add defer or async attribute to these scripts
$scripts_to_exclude = array('script1.js', 'script2.js', 'script3.js');
foreach($scripts_to_exclude as $exclude_script){
if(true == strpos($tag, $exclude_script ) )
return $tag;
}
# Defer or async all remaining scripts not excluded above
return str_replace( ' src', ' defer="defer" src', $tag );
}
add_filter( 'script_loader_tag', 'js_async_attr', 10 );</code>
</snippet>
</snippets>