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wp-content/plugins/litespeed-cache/assets/js/js_delay.js

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+window.litespeed_ui_events = window.litespeed_ui_events || ['mouseover', 'click', 'keydown', 'wheel', 'touchmove', 'touchstart'];
+var urlCreator = window.URL || window.webkitURL;
+
+// const litespeed_js_delay_timer = setTimeout( litespeed_load_delayed_js, 70 );
+
+litespeed_ui_events.forEach(e => {
+	window.addEventListener(e, litespeed_load_delayed_js_force, { passive: true }); // Use passive to save GPU in interaction
+});
+
+function litespeed_load_delayed_js_force() {
+	console.log('[LiteSpeed] Start Load JS Delayed');
+	// clearTimeout( litespeed_js_delay_timer );
+	litespeed_ui_events.forEach(e => {
+		window.removeEventListener(e, litespeed_load_delayed_js_force, { passive: true });
+	});
+
+	document.querySelectorAll('iframe[data-litespeed-src]').forEach(e => {
+		e.setAttribute('src', e.getAttribute('data-litespeed-src'));
+	});
+
+	// Prevent early loading
+	if (document.readyState == 'loading') {
+		window.addEventListener('DOMContentLoaded', litespeed_load_delayed_js);
+	} else {
+		litespeed_load_delayed_js();
+	}
+}
+
+async function litespeed_load_delayed_js() {
+	let js_list = [];
+	// Prepare all JS
+	document.querySelectorAll('script[type="litespeed/javascript"]').forEach(e => {
+		js_list.push(e);
+	});
+
+	// Load by sequence
+	for (let script in js_list) {
+		await new Promise(resolve => litespeed_load_one(js_list[script], resolve));
+	}
+
+	// Simulate doc.loaded
+	document.dispatchEvent(new Event('DOMContentLiteSpeedLoaded'));
+	window.dispatchEvent(new Event('DOMContentLiteSpeedLoaded'));
+}
+
+/**
+ * Load one JS synchronously
+ */
+function litespeed_load_one(e, resolve) {
+	console.log('[LiteSpeed] Load ', e);
+
+	var e2 = document.createElement('script');
+
+	e2.addEventListener('load', resolve);
+	e2.addEventListener('error', resolve);
+
+	var attrs = e.getAttributeNames();
+	attrs.forEach(aname => {
+		if (aname == 'type') return;
+		e2.setAttribute(aname == 'data-src' ? 'src' : aname, e.getAttribute(aname));
+	});
+	e2.type = 'text/javascript';
+
+	let is_inline = false;
+	// Inline script
+	if (!e2.src && e.textContent) {
+		e2.src = litespeed_inline2src(e.textContent);
+		// e2.textContent = e.textContent;
+		is_inline = true;
+	}
+
+	// Deploy to dom
+	e.after(e2);
+	e.remove();
+	// document.head.appendChild(e2);
+	// e2 = e.cloneNode(true)
+	// e2.setAttribute( 'type', 'text/javascript' );
+	// e2.setAttribute( 'data-delayed', '1' );
+
+	// Kick off resolve for inline
+	if (is_inline) resolve();
+}
+
+/**
+ * Prepare inline script
+ */
+function litespeed_inline2src(data) {
+	try {
+		var src = urlCreator.createObjectURL(
+			new Blob([data.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm, '$1')], {
+				type: 'text/javascript',
+			}),
+		);
+	} catch (e) {
+		var src = 'data:text/javascript;base64,' + btoa(data.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm, '$1'));
+	}
+
+	return src;
+}