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Add elementtiming attribute to all elements, as page loads or dynamically updates. Useful polyfill.
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| <!-- Add to <head> or as first script in body before any content --> | |
| <script type='text/javascript'> | |
| const observedElements = new WeakSet(); // Keep track of processed elements | |
| new MutationObserver((mutationsList, observer) => { | |
| for (let mutation of mutationsList) { | |
| for (let node of mutation.addedNodes) { | |
| if (node.nodeType === Node.ELEMENT_NODE && !observedElements.has(node)) { | |
| node.setAttribute('elementtiming', 'test'); | |
| observedElements.add(node); // Mark the element as processed | |
| } | |
| } | |
| } | |
| }).observe(document.documentElement, { childList: true, subtree: true }); | |
| new PerformanceObserver((list) => { | |
| list.getEntries().forEach((entry) => { | |
| console.log(entry.intersectionRect); | |
| console.log(entry); | |
| }) | |
| }).observe({type: "element", buferred: true}); | |
| </script> |
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