15 lines
400 B
HTML
15 lines
400 B
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<body>
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<script>
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new PerformanceObserver(entries => {
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window.parent.postMessage(entries.getEntries()[0].toJSON());
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}).observe({ entryTypes: ["largest-contentful-paint"] });
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const image = document.createElement("img");
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image.src = "/images/green.svg";
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image.id = "theImage";
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document.body.appendChild(image);
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</script>
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</body>
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