load-requirejs-in-wordpress.php

<?php

function my_enqueue_script() {
    wp_enqueue_script(
        'requirejs',
        plugins_url( '/js/require.js', __FILE__ ),
        array( 'jquery' )
    );
}
add_action( 'wp_enqueue_scripts', 'my_enqueue_script' );

function my_script_loader_tag( $tag, $handle, $src ) {
    if ( 'requirejs' == $handle ) {
        $app = plugins_url( '/js/app.js', __FILE__ );
        $tag = "<script data-main='{$app}' src='{$src}'></script>\n";
    }
    return $tag;
}
add_filter( 'script_loader_tag', 'my_script_loader_tag', 10, 3 );