Simple Defer Parsing Of Javascript Tip To Speed Up Website Load Time

Here is one way to defer parsing of Javascript to speed up your website.

This is what you need to do:

1. Copy the code below and paste it on your functions.php file.

<?php
function defer_parsing_of_js ( $url ) {
    if ( FALSE === strpos( $url, '.js' ) ) return $url;
    if ( strpos( $url, 'jquery.js' ) ) return $url;
    return "$url' async onload='myinit()";
}
add_filter( 'clean_url', 'defer_parsing_of_js', 11, 1 );
?>

2. Click Update File.