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
getState()
㯠NavigationPreloadManager
ã¤ã³ã¿ã¼ãã§ã¤ã¹ã®ã¡ã½ããã§ãäºåèªã¿è¾¼ã¿ãæå¹ã«ãªã£ã¦ãããã©ãããã¾ããã©ã®ãããªå¤ã HTTP ãããã¼ã® Service-Worker-Navigation-Preload
ã«éä¿¡ããããã示ãããããã£ãæã¤ãªãã¸ã§ã¯ããè¿ããããã¹ (Promise
) ãè¿ãã¾ãã
ãªãã
è¿å¤ä»¥ä¸ã®ããããã£ãæã¤ãªãã¸ã§ã¯ãã§è§£æ±ºãããããã¹ (Promise
) ã§ãã
enabled
äºåèªã¿è¾¼ã¿ãæå¹ã§ããã° true
ããã以å¤ã§ã¯ false
ã§ãã
äºåèªã¿è¾¼ã¿ããã fetch()
ã«ç¶ããHTTP ã®ãããã¼ Service-Worker-Navigation-Preload
ã«éä¿¡ãããå¤ãå«ãæååã ãã㯠NavigationPreloadManager.setHeaderValue()
ã使ç¨ãã¦å¤ã夿´ãããªãéããæ¢å®å¤ã¯ true
ã§ãã
InvalidStateError
DOMException
ãã® NavigationPreloadManager
ãå±ããç»é²ã«é¢é£ããã¢ã¯ãã£ããªã¯ã¼ã«ã¼ããªãå ´åã
ä¸è¨ã³ã¼ãã¯ããµã¼ãã¹ã¯ã¼ã«ã¼ãæºåå®äºããæç¹ã§ãªã¯ã¨ã¹ããããç¾å¨ã®ç¶æ ã示ãã¦ãã¾ãã
navigator.serviceWorker.ready
.then((registration) => registration.navigationPreload.getState())
.then((state) => {
console.log(state.enabled); // boolean
console.log(state.headerValue); // string
})
.catch((e) =>
console.error(`NavigationPreloadManager not supported: ${e.message}`),
);
仿§æ¸ ãã©ã¦ã¶ã¼ã®äºææ§
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