Baseline Widely available
responseStart
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responseStart
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DOMHighResTimeStamp
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ã¨ãªãã¾ããresponseStart
㨠requestStart
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const request = entry.responseStart - entry.requestStart;
ãã©ã¦ã¶ã¼ã®ããã©ã¼ãã³ã¹ã¿ã¤ã ã©ã¤ã³ã«è¨é²ãããæ°ãã resource
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ç®ãéç¥ãã PerformanceObserver
ã使ç¨ããä¾ã§ãããªãã¶ã¼ãã¼ã使ãããåã®é
ç®ã«ã¢ã¯ã»ã¹ããããã« buffered
ãªãã·ã§ã³ã使ç¨ãã¾ãã
const observer = new PerformanceObserver((list) => {
list.getEntries().forEach((entry) => {
const request = entry.responseStart - entry.requestStart;
if (request > 0) {
console.log(`${entry.name}: Request time: ${request}ms`);
}
});
});
observer.observe({ type: "resource", buffered: true });
Performance.getEntriesByType()
ã使ç¨ããä¾ã§ãããã®ã¡ã½ãããå¼ã³åºããæç¹ã§ãã©ã¦ã¶ã¼ä¸ã®ããã©ã¼ãã³ã¹ã¿ã¤ã ã©ã¤ã³ã«åå¨ãã resource
ããã©ã¼ãã³ã¹é
ç®ã®ã¿ã表示ãã¾ãã
const resources = performance.getEntriesByType("resource");
resources.forEach((entry) => {
const request = entry.responseStart - entry.requestStart;
if (request > 0) {
console.log(`${entry.name}: Request time: ${request}ms`);
}
});
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responseStart
ããããã£ã®å¤ã 0
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å ±ãè¦ãããã«ã¯ãTiming-Allow-Origin
HTTP ã¬ã¹ãã³ã¹ãããã¼ãè¨å®ããå¿
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ä¾ãã°ãhttps://developer.mozilla.org
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