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rodrigosobrero/performanceTest.html

Created October 19, 2020 18:10
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Performance API
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performanceTest.html
<!doctype html>
<html>
<head>
</head>
<body onload="loadResources()">
<script>
function loadResources() {
var image1 = new Image();
image1.onload = resourceTiming;
image1.src = 'http://www.w3.org/Icons/w3c_main.png';
}
function resourceTiming() {
var resourceList = performance.getEntriesByType("resource");
console.log(resourceList);
for (i = 0; i < resourceList.length; i++) {
if (resourceList[i].initiatorType == "img") {
console.log(resourceList[i].responseEnd - resourceList[i].startTime);
console.log('---');
}
}
}
</script>
<img id="image0" src="http://www.w3.org/Icons/w3c_home.png">
</body>
</html>
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