Baseline Widely available
å®å ¨ãªã³ã³ããã¹ãç¨: ãã®æ©è½ã¯ä¸é¨ã¾ãã¯ãã¹ã¦ã®å¯¾å¿ãã¦ãããã©ã¦ã¶ã¼ã«ããã¦ãå®å ¨ãªã³ã³ããã¹ã (HTTPS) ã§ã®ã¿å©ç¨ã§ãã¾ãã
ã¡ã¢: ãã®æ©è½ã¯ã¦ã§ãã¯ã¼ã«ã¼å ã§å©ç¨å¯è½ã§ãã
setHeaderValue()
㯠NavigationPreloadManager
ã¤ã³ã¿ã¼ãã§ã¤ã¹ã®ã¡ã½ããã§ããµã¼ãã¹ã¯ã¼ã«ã¼ã®ããã²ã¼ã·ã§ã³äºåèªã¿è¾¼ã¿ä¸ã«å®è¡ããã fetch()
æä½ã®çµæã¨ãã¦éä¿¡ããããªã¯ã¨ã¹ãã«ä»å ããã Service-Worker-Navigation-Preload
ãããã¼ã®å¤ãè¨å®ãã¾ãã ããã¯ãundefined
ã§è§£æ±ºãã空ã®ãããã¹ (Promise
) ãè¿ãã¾ãã
äºåèªã¿è¾¼ã¿ãªã¯ã¨ã¹ãã« Service-Worker-Navigation-Preload
ãããã¼ãåå¨ãããã¨ã§ããµã¼ãã¼ã¯äºåèªã¿è¾¼ã¿ãã§ãããªã¯ã¨ã¹ãã¨é常ã®ãã§ãããªã¯ã¨ã¹ãã«å¯¾ãã¦ãç°ãªããªã½ã¼ã¹ãè¿ãããã«æ§æãããã¨ãã§ãã¾ãã æ¢å®ã§ãã®ãã£ã¬ã¯ãã£ã㯠true
ã«è¨å®ããã¦ãã¾ãããã®ã¡ã½ããã§ã¯ãäºåèªã¿è¾¼ã¿ãªã¯ã¨ã¹ãã«å¯¾ãã¦è¤æ°ã®ç°ãªãå¿çãæ§æãããã¨ãå¯è½ãªã®ã§ãã
ã¡ã¢: ãã®ãããã¼ãè¨å®ãããã¨ã§ç°ãªãã¬ã¹ãã³ã¹ãè¿ãããå¯è½æ§ãããå ´åããµã¼ãã¼ã¯ç°ãªãã¬ã¹ãã³ã¹ã確å®ã«ãã£ãã·ã¥ãããããã« Vary: Service-Worker-Navigation-Preload
ãè¨å®ããå¿
è¦ãããã¾ãã
value
対象ã¨ãããµã¼ãã¼ãããªã¯ã¨ã¹ãããããªã½ã¼ã¹ã«å¯¾ãã¦ä½ãè¿ãã¹ãããæ±ºå®ããããã«ä½¿ç¨ããä»»æã®æååå¤ã§ãã
undefined
ã§è§£æ±ºãããããã¹ (Promise
) ã§ãã
InvalidStateError
DOMException
ãã® NavigationPreloadManager
ãå±ããç»é²ã«é¢é£ããã¢ã¯ãã£ããªã¯ã¼ã«ã¼ããªãå ´åã
次ã®ã³ã¼ãã¯ããã®å¤ãè¨å®ããæ¹æ³ã示ãã¦ãã¾ãã
navigator.serviceWorker.ready
.then((registration) =>
registration.navigationPreload.setHeaderValue(newValue),
)
.then(() => console.log("Done!"))
.catch((e) =>
console.error(`NavigationPreloadManager ã«å¯¾å¿ãã¦ãã¾ãã: ${e.message}`),
);
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