es6-docready/src/doc-ready.js

Document ready listener using plain javascript and ES6 module syntax

export default function docReady(callback) {

    function completed() {
        document.removeEventListener( "DOMContentLoaded", completed, false )
        window.removeEventListener( "load", completed, false )
        callback()
    }

    //Events.on(document, 'DOMContentLoaded', completed)

    if ( document.readyState === "complete" ) {
        // Handle it asynchronously to allow scripts the opportunity to delay ready
        setTimeout( callback )

    } else {

        // Use the handy event callback
        document.addEventListener( "DOMContentLoaded", completed, false );

        // A fallback to window.onload, that will always work
        window.addEventListener( "load", completed, false );
    }
}