Function pretreatment

Picviewer CE+/dist.user.js:25663–25681

(img, fetchImg)

        // ------------------- run -------------------------

        function pretreatment(img, fetchImg) {
            if (img.removeAttribute) img.removeAttribute("loading");
            if (img.nodeName.toUpperCase() != "IMG" || (!fetchImg && img.src && !img.srcset && !/^data/.test(img.src))) return;
            if (img.src && !/(^data|loading|lazy)/.test(img.src)) return;
            let src;
            tprules.find(function(rule, index, array) {
                try {
                    src = rule.call(img);
                    if (src) {
                        return true;
                    }
                } catch(err) {
                    debug(err);
                }
            });
            if (src) {
                img.src = src;
            }
        }

        function findPic(img){
            var imgPN=img;