1. PWAãšã¯äœã
1.1. PWAã®å®çŸ©
PWAã¯Progressive Web Appsã®ç¥ã§ããŠã§ããšãã€ãã£ãã¢ããªã®ç¹æ§ãèåããæ°ãã圢ã®ãŠã§ãã¢ããªã±ãŒã·ã§ã³ãæããŸãããããã¯ãŠã§ããã¯ãããžãŒïŒHTMLãCSSãJavaScriptïŒã䜿çšããŠäœæããããŠãŒã¶ãŒã«ãã€ãã£ãã¢ããªã«è¿ãäœéšãæäŸããããšãã§ããŸããPWAã¯ãã©ãŠã¶å ã§åäœãããããOSã«äŸåãããããŸããŸãªããã€ã¹ã§äœ¿çšããããšãã§ããŸãã
1.2. PWAã®ç»å Žèæ¯
PWAã®ç»å Žèæ¯ã«ã¯ããŠãŒã¶ãŒäœéšã®åäžãšéçºã®å¹çåããããŸãã
åŸæ¥ã®ãŠã§ããµã€ããšãã€ãã£ãã¢ããªã§ã¯ãããããã«ãŠãŒã¶ãŒäœéšã®å©ç¹ãšæ¬ ç¹ããããŸãããããšãã°ããã€ãã£ãã¢ããªã¯é«åºŠãªæ©èœãšã¹ã ãŒãºãªæäœæãæäŸã§ããŸããããŠãŒã¶ãŒã¯ã¢ããªãããŠã³ããŒãããŠã€ã³ã¹ããŒã«ããå¿
èŠããããŸãã
äžæ¹ããŠã§ããµã€ãã¯ãã©ãŠã¶ãä»ããŠå³åº§ã«ã¢ã¯ã»ã¹ã§ããŸããããã€ãã£ãã¢ããªã®ãããªè±å¯ãªæ©èœãé«åºŠãªãŠãŒã¶ãŒäœéšãæäŸããã®ã¯é£ããå ŽåããããŸããPWAã¯ããã®äž¡è ã®å©ç¹ãçµã¿åãããããšã§ãåªãããŠãŒã¶ãŒäœéšãšå¹ççãªéçºãå¯èœã«ããŸããã
1.3. PWAãšåŸæ¥ã®ãŠã§ãããã€ãã£ãã¢ããªãšã®æ¯èŒ
PWAãšåŸæ¥ã®ãŠã§ãããã€ãã£ãã¢ããªãæ¯èŒãããšã次ã®ãããªç¹åŸŽãèŠãããŸãã
ç¹æ§ | ãŠã§ããµã€ã | ãã€ãã£ãã¢ã㪠| PWA |
---|---|---|---|
ã€ã³ã¹ããŒã« | äžèŠ | å¿ èŠ | äžèŠïŒãªãã·ã§ã³ã§å¯èœïŒ |
ãªãã©ã€ã³ã§ã®åäœ | äžå¯èœ | å¯èœ | å¯èœ |
ããã·ã¥éç¥ | äžå¯èœ | å¯èœ | å¯èœ |
ã¬ã¹ãã³ã·ããã¶ã€ã³ | å¯èœ | åºæã®ãã¶ã€ã³ | å¯èœ |
éçºã³ã¹ã | äœãäž | é« | äœãäž |
ãã®è¡šããããããããã«ãPWAã¯ãŠã§ããµã€ããšãã€ãã£ãã¢ããªã®éã«äœçœ®ããååšã§ãããäž¡è ã®å©ç¹ãèåããŠããŸãããã®ãããå©çšè ã«ãšã£ãŠã¯ãã€ãã£ãã¢ããªã«å¹æµãããªãããªäœéšãæäŸãã€ã€ãéçºè ã«ãšã£ãŠã¯äžåºŠã®éçºã§è€æ°ã®ãã©ãããã©ãŒã ã«å¯Ÿå¿ã§ãããšããå©ç¹ããããŸãã
2. PWAã®äž»ãªç¹åŸŽ
ããŠã次ã«PWAã®äž»ãªç¹åŸŽã«ã€ããŠè©³ããèŠãŠãããŸããããPWAã«ã¯ã¬ã¹ãã³ã·ããã¶ã€ã³ããªãã©ã€ã³ã§ã®å©çšãããã·ã¥éç¥ãããŒã ç»é¢ãžã®è¿œå ãªã©ããŠãŒã¶ãŒã«ãšã£ãŠäŸ¿å©ãªæ©èœãåãã£ãŠããŸãã
2.1. ã¬ã¹ãã³ã·ããã¶ã€ã³
PWAã¯ã¬ã¹ãã³ã·ããã¶ã€ã³ã«å¯Ÿå¿ããŠããŸããããã¯ããŠã§ããµã€ãããŠãŒã¶ãŒã䜿çšããŠããããã€ã¹ã®ç»é¢ãµã€ãºã«å¿ããŠã¬ã€ã¢ãŠããèªåçã«èª¿æŽãããã¶ã€ã³ã®ããšãæããŸããã¹ããŒããã©ã³ãã¿ãã¬ããããã¹ã¯ããããªã©ãããŸããŸãªããã€ã¹ã§åããŠã§ããµã€ããèŠãŠããæé©ãªè¡šç€ºã«ãªãã®ãç¹åŸŽã§ãã
2.2. ãªãã©ã€ã³ã§ãæ©èœ
ãŸããPWAã¯ãªãã©ã€ã³ã§ãæ©èœããŸããããã¯ãåŸæ¥ã®ãŠã§ããµã€ãã§ã¯ã§ããªãã£ãããšã§ããã€ãã£ãã¢ããªã®åŒ·ã¿ã®äžã€ã§ããã
PWAã¯Service Workerãšãããã¯ãããžãŒãå©çšããããšã§ããŠãŒã¶ãŒããªãã©ã€ã³ã®ç¶æ ã§ãäžéšã®æ©èœãå©çšã§ããããã«ãªããŸããäŸãã°ã以åã«è¡šç€ºããããŒãžã®æ å ±ããã£ãã·ã¥ããŠãããã€ã³ã¿ãŒãããæ¥ç¶ããªãç¶æ ã§ããã®æ å ±ã衚瀺ã§ããã®ã§ãã
2.3. ããã·ã¥éç¥ã®å¯èœæ§
PWAã¯ããã·ã¥éç¥ããµããŒãããŠããŸããããã·ã¥éç¥ã¯ãŠãŒã¶ãŒãã¢ããªã«å¯ŸããŠèš±å¯ãäžããå Žåã«éãããŠã§ããµã€ãããçŽæ¥ãŠãŒã¶ãŒã®ããã€ã¹ã«éç¥ãéãããšãã§ããæ©èœã§ããããã«ãããæ°ããã³ã³ãã³ããã¢ããããŒãæ å ±ããŠãŒã¶ãŒã«å³åº§ã«éç¥ããããšãå¯èœã«ãªããŸãã
2.4. ããŒã ç»é¢ãžã®è¿œå
æåŸã«ãPWAã¯ãŠãŒã¶ãŒãèªåã®ããã€ã¹ã®ããŒã ç»é¢ã«è¿œå ããããšãã§ããŸããããã«ããããŠãŒã¶ãŒã¯ãã©ãŠã¶ãéããŠURLãå ¥åããæéãçããäžã€ã®ã¿ããã§PWAãèµ·åããããšãã§ããŸãããŸããã¢ã€ã³ã³ãšãšãã«ããŒã ç»é¢ã«è¡šç€ºãããããããã€ãã£ãã¢ããªã®ãããªèŠèŠçãªååšæãæäŸã§ããŸãããŠãŒã¶ãŒãé »ç¹ã«å©çšãããµã€ãã§ããã°ããã»ã©ããã®æ©èœã¯å€§ããªå©ç¹ãšãªããŸãã
以äžã®ãããªç¹åŸŽã«ãããPWAã¯ãŠã§ããµã€ããšãã€ãã£ãã¢ããªã®å¢çããªããæ°ãã圢ã®ãŠã§ãã¢ããªã±ãŒã·ã§ã³ãšããŠæ³šç®ãéããŠããŸããããããã®ç¹æ§ãæ倧éã«æŽ»ããããšã§ããŠãŒã¶ãŒã«ãšã£ãŠããè¯ãäœéšãæäŸããããšãå¯èœã«ãªããŸãã
3. PWAã®ã¡ãªãã
PWAã«ã¯æ°å€ãã®ã¡ãªããããããŸãããŠãŒã¶ãŒäœéšã®åäžãéçºãšã¡ã³ããã³ã¹ã®å¹çæ§ããªã³ã©ã€ã³ãšãªãã©ã€ã³ã®ã·ãŒã ã¬ã¹ãªçµ±åãªã©ããã®ç¹æ§ã¯ãŠã§ããšãã€ãã£ãã¢ããªã®æè¯ã®éšåãçµã¿åããããã®ãšèšããŸãã
3.1. ãŠãŒã¶ãŒäœéšã®åäž
PWAã®æ倧ã®ã¡ãªããã®äžã€ã¯ããŠãŒã¶ãŒäœéšã®åäžã§ãã
PWAã¯é«éã«åäœããã¬ã¹ãã³ã·ããªãã¶ã€ã³ã«ããåçš®ããã€ã¹ã«å¯Ÿå¿ããŸãããŸããããŒã ç»é¢ãžã®è¿œå ãããã·ã¥éç¥ãªã©ã®æ©èœã«ããããŠãŒã¶ãŒã«ã¯ãã€ãã£ãã¢ããªã«è¿ãäœéšãæäŸããŸãããããã®ç¹æ§ã¯ãŠãŒã¶ãŒãšã³ã²ãŒãžã¡ã³ããé«ãããŠã§ããµã€ãã®å©çšæéãå蚪åçãå¢å ãããå¯èœæ§ããããŸãã
3.2. éçºãšã¡ã³ããã³ã¹ã®å¹çæ§
次ã«ãéçºãšã¡ã³ããã³ã¹ã®å¹çæ§ãPWAã®å€§ããªã¡ãªããã§ãã
PWAã¯äžã€ã®ã³ãŒãããŒã¹ã§åçš®ããã€ã¹ã«å¯Ÿå¿ã§ãããããéçºãšã¡ã³ããã³ã¹ã®æéãå€§å¹ ã«åæžãããŸãããŸãããŠã§ãæè¡ïŒHTMLãCSSãJavaScriptïŒãçšããŠéçºãããããããã€ãã£ãã¢ããªéçºã«æ¯ã¹ãŠéçºè ã®ã¹ãã«ã»ããã®ç¿åŸã容æã§ãã
3.3. ãªã³ã©ã€ã³ãšãªãã©ã€ã³ã®ã·ãŒã ã¬ã¹ãªçµ±å
æåŸã«ããªã³ã©ã€ã³ãšãªãã©ã€ã³ã®ã·ãŒã ã¬ã¹ãªçµ±åãPWAã®éèŠãªã¡ãªããã§ãã
PWAã¯ãªãã©ã€ã³ã§ãäžéšã®æ©èœãå©çšã§ãããããã€ã³ã¿ãŒãããæ¥ç¶ãäžå®å®ãªå Žæã§ããŠãŒã¶ãŒäœéšãç¶æãããŸããããã«ããããŠãŒã¶ãŒã¯åžžã«å®å®ããäœéšãåŸãããšãã§ãããšã³ã²ãŒãžã¡ã³ãã®åäžã«ã€ãªãããŸãã
4. PWAã®ãã¡ãªãããšãã®å¯Ÿç
PWAã¯å€ãã®ã¡ãªãããæã€äžæ¹ã§ãããã€ãã®ãã¡ãªãããååšããŸãã
ãã©ãŠã¶ã®äºææ§åé¡ãæ©èœå¶éã®åé¡ãªã©ãæããããŸããããããã®åé¡ã«ã¯å¯Ÿçã解決çãååšããŸãã
4.1. ãã©ãŠã¶ã®äºææ§åé¡
PWAã¯æ°ããæè¡ã§ãããå šãŠã®ãã©ãŠã¶ãPWAã®å šãŠã®æ©èœããµããŒãããŠããããã§ã¯ãããŸãããç¹ã«ãAppleã®Safariã§ã¯äžéšã®PWAæ©èœãå¶éãããŠããŸããããã¯ããŠãŒã¶ãŒãSafariã䜿çšããŠããå Žåãæé©ãªäœéšãæäŸã§ããªããšããåé¡ãåŒãèµ·ããå¯èœæ§ããããŸãã
4.2. æ©èœå¶éã®åé¡
ãŸããPWAã¯ãã€ãã£ãã¢ããªãšæ¯èŒããŠãã¢ã¯ã»ã¹ã§ããããã€ã¹ã®æ©èœãå¶éãããå¯èœæ§ããããŸãã
ããšãã°ãBluetoothãNFCãç¹å®ã®ã»ã³ãµãŒãžã®ã¢ã¯ã»ã¹ãå¶éãããå ŽåããããŸããããã¯ããã€ãã£ãã¢ããªã®ãããªæ·±ãããã€ã¹çµ±åãå¿ èŠãšããäžéšã®ã¢ããªã±ãŒã·ã§ã³ã«ãšã£ãŠã¯ãã¡ãªãããšãªããŸãã
4.3. 察çãšè§£æ±ºç
ãããã®åé¡ã«å¯Ÿãã察çãšããŠã¯ããŸãã¯èªèº«ã®ãŠãŒã¶ãŒããŒã¹ãç解ããããšãéèŠã§ãã
ãŠãŒã¶ãŒãäž»ã«ã©ã®ãã©ãŠã¶ã䜿çšããŠãããããŸãã¯ã©ã®ããã€ã¹ã®æ©èœãå¿ èŠãšããŠããããææ¡ããããšã§ãPWAãé©åãªãœãªã¥ãŒã·ã§ã³ã§ããããå€æããããšãã§ããŸãã
ãŸãããã©ãŠã¶ã®äºææ§åé¡ã«ã€ããŠã¯ãPWAã®æ©èœã段éçã«å°å ¥ããããšãäžã€ã®è§£æ±ºçãšãªããŸããããã«ãããPWAã®å šãŠã®æ©èœããµããŒãããŠããªããã©ãŠã¶ã䜿çšããŠãããŠãŒã¶ãŒã§ããäžéšã®æ©èœãå©çšããããšãå¯èœã«ãªããŸãã
æåŸã«ãæ©èœå¶éã®åé¡ã«ã€ããŠã¯ãPWAãšãã€ãã£ãã¢ããªã䜵çšãããã€ããªããã¢ãããŒããæå¹ã§ããå¿ èŠãªæ©èœããã€ãã£ãã¢ããªã§æäŸãããã®ä»ã®éšåãPWAã§è£å®ããããšã§ããŠãŒã¶ãŒã«æé©ãªäœéšãæäŸããããšãå¯èœã§ããããã«ãããããã€ã¹ã®æ©èœãžã®ãã«ã¢ã¯ã»ã¹ãšPWAã®ã¡ãªãããäž¡æ¹ãšã享åããããšãå¯èœãšãªããŸãã
5. PWAã®å ·äœçãªäœ¿çšäŸ
PWAã®æ¡çšã¯äžçäžã®å€ãã®äŒæ¥ã§èŠããããã®å¹æã泚ç®ãããŠããŸããããã§ã¯ãç¹ã«æ³šç®ãããŠããäŒæ¥ã®PWAæ¡çšäºäŸãšããã®å¹æã«ã€ããŠè§£èª¬ããŸãã
5.1. æåäŒæ¥ã«ããPWAã®æ¡çšäºäŸ
äžççã«æåãªäŒæ¥ã§PWAãæ¡çšããŠããäŸãšããŠã¯ãTwitterãæããããŸããTwitterã¯ãTwitter LiteããšããPWAããªãªãŒã¹ããŸããããã®ã¢ããªã¯ãéåžžã®Twitterã¢ããªãšæ¯ã¹ãŠããŒã¿äœ¿çšéãå€§å¹ ã«åæžãããäœéãªãããã¯ãŒã¯ã§ãã¹ã ãŒãºã«åäœããŸãããŸãããªãã©ã€ã³æã§ãäžéšã®æ©èœã䜿çšããããšãã§ããŸãã
ãŸããå°å£²æ¥çã§ã¯ãã¹ã¿ãŒããã¯ã¹ãPWAãæ¡çšããŠããŸããã¹ã¿ãŒããã¯ã¹ã¯ããªãã©ã€ã³ã§ãã¡ãã¥ãŒãé²èŠ§ãã泚æãã«ãŒãã«è¿œå ããããšãã§ããPWAãéçºããŸãããããã«ãããåºèå ã®Wi-Fiã«æ¥ç¶ããŠããªãç¶æ ã§ãã泚æã®äºåæºåãå¯èœãšãªããŸããã
5.2. PWAããããããå¹æãšå€å
ãããã®äŒæ¥ãPWAãæ¡çšããããšã§ãæ°å€ãã®å¹æãèŠãããŠããŸããTwitter Liteã®æ¡çšã«ãããTwitterã¯æ°èŠãŠãŒã¶ãŒã®å¢å ãšããŠãŒã¶ãŒã®æ»åšæéã®å¢å ãå ±åããŠããŸããç¹ã«ãäœéãªãããã¯ãŒã¯ã䜿çšããå°åã§ã¯ãTwitter Liteã®æ¡çšã倧ããªåœ±é¿ãäžããŸããã
ã¹ã¿ãŒããã¯ã¹ã®å ŽåãPWAã®æ¡çšã«ãããªã³ã©ã€ã³ã§ã®æ³šææ°ãå¢å ããŸããããŸãããªãã©ã€ã³ç¶æ ã§ãååã®é²èŠ§ã泚æã®æºåãã§ããããã«ãªã£ãããšã§ãåºèã§ã®æ··éãç·©åããã«ã¹ã¿ããŒãµãŒãã¹ã®åäžã«ãã€ãªãããŸããã
6. èªåã®ãŠã§ããµã€ãã«PWAãå°å ¥ããããã®åºæ¬çãªã¹ããã
PWAãèªèº«ã®ãŠã§ããµã€ãã«å°å ¥ããããšã§ããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ã®åäžããããžãã¹ææã®æ¹åãç®æãããšãã§ããŸããããã§ã¯ãPWAãèªåã®ãŠã§ããµã€ãã«å°å ¥ããããã®åºæ¬çãªã¹ãããã解説ããŸãã
6.1. PWAéçºã®åææ¡ä»¶
PWAã®éçºã«åãçµãåã«ãããã€ãã®åææ¡ä»¶ãæºãããŠããããšãå¿ èŠã§ãããŸãããŠã§ããµã€ãã¯HTTPSã«å¯Ÿå¿ããŠããå¿ èŠããããŸããPWAã§ã¯ãå®å šãªæ¥ç¶ãæ±ãããããããHTTPSã®èšå®ã¯å¿ é ãšãªããŸãã
ãŸããPWAã®éçºã«ã¯ãHTMLãCSSãJavaScriptã®åºæ¬çãªç¥èãå¿ èŠã§ãããããã®æè¡ãçšããŠãŠã§ãããŒãžãäœæãããããPWAã«å€æããããšãå¯èœã§ãã
6.2. PWAã®åºæ¬çãªèšèšãšéçº
PWAã®èšèšãšéçºã«ã¯ãããã€ãã®äž»èŠãªèŠçŽ ãå«ãŸããŸãããŸãããManifest.jsonããšããèšå®ãã¡ã€ã«ãäœæããŸãããã®ãã¡ã€ã«ã§ã¯ãã¢ããªã®ååãã¢ã€ã³ã³ã衚瀺ããURLã衚瀺ã¢ãŒãïŒãã«ã¹ã¯ãªãŒã³ãã¹ã¿ã³ãã¢ãã³ãªã©ïŒãªã©ãã¢ããªã®åºæ¬æ å ±ãå®çŸ©ããŸãã
次ã«ããService WorkerããšããJavaScriptãã¡ã€ã«ãäœæããŸããService Workerã¯ããªãã©ã€ã³æã®æåããããã·ã¥éç¥ãããã¯ã°ã©ãŠã³ãåæãªã©ãPWAã®äž»èŠãªæ©èœãå¶åŸ¡ããŸãã
ãããã®èšå®ãè¡ã£ãåŸããŠã§ãããŒãžã®ã³ãŒãã«ãããã®ãã¡ã€ã«ãçŽä»ããŸããããã«ãããéåžžã®ãŠã§ããµã€ããPWAã«å€ãããŸãã
6.3. ãã¹ããšãããã€
PWAã®éçºãå®äºãããããã¹ããè¡ãããšãéèŠã§ãããã¹ãã§ã¯ããªã³ã©ã€ã³ç¶æ ãšãªãã©ã€ã³ç¶æ ã®äž¡æ¹ã§ã¢ããªãæ£åžžã«åäœããããããã·ã¥éç¥ãæ£ãã衚瀺ããããããªã©ã確èªããŸãããã¹ãã«ã¯ãChromeã®ãLighthouseããšããããŒã«ã圹ç«ã¡ãŸãã
ãã¹ããå®äºãåé¡ããªããã°ãPWAããããã€ããŸããããã«ããããŠãŒã¶ãŒã¯ããªãã®ãŠã§ããµã€ããPWAãšããŠäœ¿çšããããšãã§ããããã«ãªããŸãããããã€åŸã¯ããŠãŒã¶ãŒããã®ãã£ãŒãããã¯ãå ã«ãå¿ èŠã«å¿ããŠPWAãæ¹åããŠãããŸãã
以äžããèªåã®ãŠã§ããµã€ãã«PWAãå°å ¥ããããã®åºæ¬çãªã¹ãããã§ãããã®éçšã¯æè¡çãªèŠçŽ ãå€ãå«ã¿ãŸãããããããã®ã¹ããããäžã€ãã€äžå¯§ã«é²ããŠããããšã§ãããè¯ããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãæäŸãããŠã§ããµã€ããäœãããšãã§ããŸãã
ãŸããPWAã®å°å ¥ã¯äžæçãªãã®ã§ã¯ãªããåžžã«ææ°ã®æè¡ååããã£ããã¢ãããããŠãŒã¶ãŒã®ããŒãºã«åãããŠã¢ããããŒããç¶ããå¿ èŠããããŸããPWAã®å°å ¥ã«ããããŠã§ããµã€ãã¯ãŠãŒã¶ãŒã«ãšã£ãŠãã䜿ãããããå¹æçãªããŒã«ãšãªãã§ãããã
7. PWAã®æªæ¥
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7.1. PWAã®çºå±äºæ³
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7.2. PWAã®åœ±é¿ãåãŒãæ¥çã®å€å
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8. ãŸãšã
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