class portfolio extends Paged.Handler {
    constructor(chunker, polisher, caller) {
        super(chunker, polisher, caller);
    }

    beforeParsed(content) {
        portfolioSpread(content);
    }


    // delete running title page 2
    afterPageLayout(pageElement, page, breakToken) {
        if(pageElement.classList.contains("pagedjs_portfolio_page") && pageElement.querySelector(".chapter-header")){
            pageElement.querySelector(".pagedjs_margin-top").style.display = "none";
            pageElement.querySelector(".pagedjs_margin-top-left-corner-holder").style.display = "none";
        }
  
    }
}

Paged.registerHandlers(portfolio);






function portfolioSpread(content){
    content.querySelectorAll('.portfolio-spread').forEach(block => {
        const clone = block.cloneNode(true);
        clone.classList.add('portfolio-spread-right');
        block.classList.add('portfolio-spread-left');
        block.parentNode.insertBefore(clone, block.nextSibling);
    });
}