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