content-injection.js

document.addEventListener("DOMContentLoaded", () => {

    if(ad_html) {

        if( document.querySelector('.ad-container') ) {
            document.querySelector('.ad-container').outerHTML = ad_html;
        }

        var ad_counter = [0];
        document.querySelectorAll('.article-content > *').forEach(element => {
            if( element.tagName === 'P' ) {
                ad_counter[ad_counter.length - 1]++;
            } else {
                ad_counter.push(0);
            }
        })

        var ad_max = Math.max(...ad_counter);
        if(ad_max >= 5) {
            var ad_count = 0;
            ad_counter.forEach(ad_item => {
                if(ad_item == ad_max) {
                    ad_count += ad_max / 2 | 0;
                } else {
                    ad_count += ad_item;
                }
            })
            var ad_placement = document.querySelector('.article-content > p:nth-child(' + ad_count + ')');
            ad_placement.insertAdjacentHTML('afterend', ad_html);
        }
    }

})