Where is script-loader.php creating JS tags

Question

I have a script being auto created in wp-includes/script-loader.php

This is jquery that wordpress depends on as well as some plugins for the site

$scripts->add( 'jquery-core', '/wp-includes/js/jquery/jquery.js', array(), '1.12.4' );

I need to add defer to the tag where this is created, I tried removing it and moving to the head but wordpress as well as the dependent plugins break as if its totally missing.

I assume its code like this, just not sure which to change:

$src = $wp_scripts->base_url . "/wp-admin/load-scripts.php?c={$zip}&" . $concat . '&ver=' . $wp_scripts->default_version;
        echo "<script type='text/javascript' src='" . esc_attr($src) . "'></script>\n";

Any ideas. Thanks.

Check this out, which explains how to add defer attribute.

bravokeyl
– bravokeyl

2017-08-07 15:40:54 +00:00
Commented Aug 7, 2017 at 15:40 — bravokeyl
– bravokeyl, Commented Aug 7, 2017 at 15:40
So where would that script_loader_tag code go?

Lewis Smith
– Lewis Smith

2017-08-07 15:42:26 +00:00
Commented Aug 7, 2017 at 15:42 — Lewis Smith
– Lewis Smith, Commented Aug 7, 2017 at 15:42

bravokeyl · Accepted Answer · 2017-08-07 18:36:55Z

0

add_filter( 'script_loader_tag', function ( $tag, $handle ) {

    if ( 'jquery-core' !== $handle )
        return $tag;

    return str_replace( ' src', ' defer="defer" src', $tag );
}, 10, 2 );

Provided by: toscho

edited Aug 7, 2017 at 18:36

bravokeyl

3,3776 gold badges28 silver badges34 bronze badges

answered Aug 7, 2017 at 15:50

Lewis Smith

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