Desktop, Mobile: Added support for notebook icons

packages/app-desktop/gui/utils/loadScript.ts

@@ -0,0 +1,48 @@
+import Logger from '@joplin/lib/Logger';
+
+const logger = Logger.create('loadScript');
+
+export interface Script {
+	id: string;
+	src: string;
+	attrs?: Record<string, any>;
+}
+
+export const loadScript = async (script: Script) => {
+	return new Promise((resolve) => {
+		let element: any = document.getElementById(script.id);
+
+		if (element) {
+			if (element.href === script.src || element.src === script.src) {
+				logger.info(`Trying to load a script that has already been loaded: ${JSON.stringify(script)} - skipping it`);
+				resolve(null);
+			} else {
+				logger.info(`Source of script has changed - reloading it: ${JSON.stringify(script)}`);
+				element.parentNode.removeChild(element);
+				element = null;
+			}
+		}
+
+		if (script.src.indexOf('.css') >= 0) {
+			element = document.createElement('link');
+			element.rel = 'stylesheet';
+			element.href = script.src;
+		} else {
+			element = document.createElement('script');
+			element.src = script.src;
+			if (script.attrs) {
+				for (const attr in script.attrs) {
+					element[attr] = script.attrs[attr];
+				}
+			}
+		}
+
+		element.id = script.id;
+
+		element.onload = () => {
+			resolve(null);
+		};
+
+		document.getElementsByTagName('head')[0].appendChild(element);
+	});
+};