Activate CORS for WP-API (JSON REST API)

gistfile1.php

/**
 * bitflower: Activate CORS for WP-API (JSON REST API)
 */
do_action("json_api", $controller, $method);
add_action( 'json_api', function( $controller, $method )
{
    # DEBUG
    // wp_die( "To target only this method use <pre><code>add_action('$controller-$method', function(){ /*YOUR-STUFF*/ });</code></pre>" );
    header( "Access-Control-Allow-Origin: *" );
}, 10, 2 );