phaser/v3/src/dom/DOMContentLoaded.js

/**
* @author       Richard Davey <rich@photonstorm.com>
* @copyright    2016 Photon Storm Ltd.
* @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/

var isBooted = false;

function DOMContentLoaded (callback)
{
    if (isBooted)
    {
        return;
    }

    if (document.readyState === 'complete' || document.readyState === 'interactive')
    {
        isBooted = true;
        
        callback();

        return;
    }

    var check = function ()
    {
        isBooted = true;

        document.removeEventListener('deviceready', check, true);
        document.removeEventListener('DOMContentLoaded', check, true);
        window.removeEventListener('load', check, true);

        callback();
    };

    if (!document.body)
    {
        window.setTimeout(check, 20);
    }
    else
    {
        document.addEventListener('DOMContentLoaded', check, true);
        window.addEventListener('load', check, true);
    }
}

module.exports = DOMContentLoaded;