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add_filter('the_content', 'edupage_whatsapp_channel_banner', 20); function edupage_whatsapp_channel_banner($content) { // Show only on individual published blog posts. if ( !is_singular('post') || !in_the_loop() || !is_main_query() ) { return $content; } $channel_url = 'https://whatsapp.com/channel/0029VbDUV5dEgGfM6gVWcy47'; $banner = '
'; return $content . $banner; } add_action('wp_head', 'edupage_whatsapp_banner_styles'); function edupage_whatsapp_banner_styles() { ?> /(trident|msie)/i.test(navigator.userAgent)&&document.getElementById&&window.addEventListener&&window.addEventListener("hashchange",function(){var t,e=location.hash.substring(1);/^[A-z0-9_-]+$/.test(e)&&(t=document.getElementById(e))&&(/^(?:a|select|input|button|textarea)$/i.test(t.tagName)||(t.tabIndex=-1),t.focus())},!1);