remove unselected elements as soon as possible

lib/single-file/single-file-core.js

@@ -80,6 +80,7 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 		sequential: [
 			{ action: "repairDocument" },
 			{ action: "replaceStyleContents" },
+			{ option: "selected", action: "removeUnselectedContent" },
 			{ option: "removeVideoSrc", action: "insertVideoPosters" },
 			{ option: "removeAlternativeImages", action: "removeAlternativeImages" },
 			{ option: "removeFrames", action: "removeFrames" },
@@ -158,6 +159,7 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 
 		async initialize() {
 			this.onprogress(new ProgressEvent(RESOURCES_INITIALIZING, { pageURL: this.options.url }));
+
 			await this.executeStage(0);
 			this.pendingPromises = this.executeStage(1);
 			if (this.options.doc) {
@@ -307,14 +309,6 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 
 		async getPageData() {
 			DOM.postProcessDoc(this.doc, this.options);
-			if (this.options.selected) {
-				const rootElement = this.doc.querySelector("[" + SELECTED_CONTENT_ROOT_ATTRIBUTE_NAME + "]");
-				if (rootElement) {
-					DomProcessorHelper.isolateElements(rootElement);
-					rootElement.removeAttribute(SELECTED_CONTENT_ROOT_ATTRIBUTE_NAME);
-					rootElement.removeAttribute(SELECTED_CONTENT_ATTRIBUTE_NAME);
-				}
-			}
 			const titleElement = this.doc.querySelector("title");
 			this.options.title = titleElement ? titleElement.textContent.trim() : "";
 			this.options.info = {};
@@ -348,6 +342,15 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 			};
 		}
 
+		removeUnselectedContent() {
+			const rootElement = this.doc.querySelector("[" + SELECTED_CONTENT_ROOT_ATTRIBUTE_NAME + "]");
+			if (rootElement) {
+				DomProcessorHelper.isolateElements(rootElement);
+				rootElement.removeAttribute(SELECTED_CONTENT_ROOT_ATTRIBUTE_NAME);
+				rootElement.removeAttribute(SELECTED_CONTENT_ATTRIBUTE_NAME);
+			}
+		}
+
 		setInputValues() {
 			this.doc.querySelectorAll("input").forEach(input => {
 				const value = input.getAttribute(DOM.inputValueAttributeName(this.options.sessionId));