always remove data-* attributes

lib/single-file/lazy-loader.js

@@ -32,25 +32,25 @@ this.lazyLoader = this.lazyLoader || (() => {
 				const dataBg = element.dataset.bg;
 				if (dataBg && dataBg.startsWith(DATA_URI_PREFIX) && dataBg != EMPTY_DATA_URI && !element.style.backgroundImage.includes(dataBg)) {
 					element.style.backgroundImage = "url(" + element.dataset.bg + ")";
-					element.removeAttribute("data-bg");
 					processElement(element);
 				}
+				element.removeAttribute("data-bg");
 			});
 			doc.querySelectorAll("[data-srcset]").forEach(imgElement => {
 				const srcset = imgElement.dataset.srcset;
 				if (srcset && imgElement.srcset != srcset) {
 					imgElement.srcset = srcset;
-					imgElement.removeAttribute("data-srcset");
 					processElement(imgElement);
 				}
+				imgElement.removeAttribute("data-srcset");
 			});
 			doc.querySelectorAll("[data-lazy-srcset]").forEach(imgElement => {
 				const srcset = imgElement.dataset.lazySrcset;
 				if (srcset && imgElement.srcset != srcset) {
 					imgElement.srcset = srcset;
-					imgElement.removeAttribute("data-lazy-srcset");
 					processElement(imgElement);
 				}
+				imgElement.removeAttribute("data-lazy-srcset");
 			});
 			doc.querySelectorAll(".lazyload").forEach(element => {
 				element.classList.add("lazypreload");
@@ -76,9 +76,9 @@ this.lazyLoader = this.lazyLoader || (() => {
 			const dataSrc = element.dataset[propertyName || attributeName];
 			if (dataSrc && dataSrc.startsWith(DATA_URI_PREFIX) && dataSrc != EMPTY_DATA_URI && element.src != dataSrc) {
 				element.src = element.dataset[propertyName || attributeName];
-				element.removeAttribute("data-" + attributeName);
 				processElement(element);
 			}
+			element.removeAttribute("data-" + attributeName);
 		});
 	}