å ç¢ãªJavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ãæ§ç¯ããªã¢ã«ã¿ã€ã åæãã©ãããã©ãŒã ããšã©ãŒè¿œè·¡ãããã©ãŒãã³ã¹ææšãæé©åæŠç¥ã«ã€ããŠåŠã³ãŸãããã
JavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ã¹ãã©ã¯ãã£ïŒãªã¢ã«ã¿ã€ã åæãã©ãããã©ãŒã
仿¥ã®ããŒã¹ã®éãããžã¿ã«äžçã§ã¯ããŠã§ããµã€ããã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ã¯ããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãšããžãã¹ã®æåã«ãšã£ãŠæ¥µããŠéèŠã§ããèªã¿èŸŒã¿æéãé ããã€ã³ã¿ãŒãã§ãŒã¹ã®åå¿ãéããäºæãã¬ãšã©ãŒãçºçãããšããŠãŒã¶ãŒã®äžæºãã«ãŒãã®æŸæ£ããããŠæçµçã«ã¯åçã®æå€±ã«ã€ãªããå¯èœæ§ããããŸãããããã£ãŠãå ç¢ãªJavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ã¹ãã©ã¯ãã£ã¯ããŠãŒã¶ãŒã«åœ±é¿ãåã¶åã«ããã©ãŒãã³ã¹ã®åé¡ãç¹å®ãã解決ããããã«äžå¯æ¬ ã§ãã
JavaScriptããã©ãŒãã³ã¹ç£èŠã«æè³ããçç±
å æ¬çãªJavaScriptããã©ãŒãã³ã¹ç£èŠãœãªã¥ãŒã·ã§ã³ã«æè³ããããšã«ã¯ãæ°å€ãã®å©ç¹ããããŸãã
- ãŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ã®åäžïŒããã©ãŒãã³ã¹ã®ããã«ããã¯ãç¹å®ã察åŠããããšã§ãã¹ã ãŒãºã§å¿çæ§ã®é«ããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ã確ä¿ãããŠãŒã¶ãŒæºè¶³åºŠãšãšã³ã²ãŒãžã¡ã³ãã®åäžã«ã€ãªãããŸãã
- çŽåž°çã®äœæžïŒèªã¿èŸŒã¿æéã®é ãã¯çŽåž°çã®äž»ãªåå ã§ããããã©ãŒãã³ã¹ãæé©åããããšã§ããŠãŒã¶ãŒããµã€ãã«é·ãçããã³ã³ããŒãžã§ã³ã®å¯èœæ§ãé«ããããšãã§ããŸãã
- ã³ã³ããŒãžã§ã³çã®åäžïŒé«éã§ä¿¡é Œæ§ã®é«ããŠã§ããµã€ããã¢ããªã±ãŒã·ã§ã³ã¯ãã³ã³ããŒãžã§ã³çã«çŽæ¥åœ±é¿ããŸãããŠãŒã¶ãŒã¯ãããžãã£ããªäœéšããããšãååŒãå®äºããããæãŸããè¡åãåã£ããããå¯èœæ§ãé«ããªããŸãã
- åžå Žæå ¥ãŸã§ã®æéççž®ïŒããã©ãŒãã³ã¹ãç©æ¥µçã«ç£èŠããããšã§ãéçºãµã€ã¯ã«ã®æ©ã段éã§åé¡ãç¹å®ããŠä¿®æ£ããã³ã¹ãã®ãããé å»¶ãææ»ãã®ãªã¹ã¯ãæžããããšãã§ããŸãã
- SEOã©ã³ãã³ã°ã®åäžïŒGoogleã®ãããªæ€çŽ¢ãšã³ãžã³ã¯ããŠã§ããµã€ãã®é床ãã©ã³ãã³ã°èŠå ãšããŠèæ ®ããŸããããã©ãŒãã³ã¹ãæé©åããããšã§ãæ€çŽ¢ãšã³ãžã³ã§ã®ã©ã³ãã³ã°ãåäžãããµã€ããžã®ãªãŒã¬ããã¯ãã©ãã£ãã¯ãå¢ããããšãã§ããŸãã
- ã€ã³ãã©ã³ã¹ãã®åæžïŒéå¹çãªã³ãŒããç¹å®ãæé©åããããšã§ããµãŒããŒã®è² è·ãšã€ã³ãã©ã³ã¹ããåæžã§ããŸãã
JavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ã¹ãã©ã¯ãã£ã®äž»èŠã³ã³ããŒãã³ã
å®å šãªJavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ã¹ãã©ã¯ãã£ã«ã¯ãéåžžã以äžã®ã³ã³ããŒãã³ããå«ãŸããŸãã
1. ãªã¢ã«ã¿ã€ã åæãã©ãããã©ãŒã
ãªã¢ã«ã¿ã€ã åæãã©ãããã©ãŒã ã¯ãäž»èŠæ¥çžŸè©äŸ¡ææšïŒKPIïŒããªã¢ã«ã¿ã€ã ã§ç£èŠããããã®äžå åãããããã·ã¥ããŒããæäŸããŸããããã«ãããããã©ãŒãã³ã¹ã®åé¡ãçºçããéã«è¿ éã«ç¹å®ãã察å¿ããããšãå¯èœã«ãªããŸãã
äž»ãªæ©èœïŒ
- ãªã¢ã«ã¿ã€ã ããŒã¿å¯èŠåïŒãã£ãŒããã°ã©ããããã·ã¥ããŒããªã©ã®ããã©ãŒãã³ã¹ããŒã¿ã®èŠèŠç衚çŸã«ããããã¬ã³ããç°åžžã容æã«ç¹å®ã§ããŸãã
- ã«ã¹ã¿ãã€ãºå¯èœãªããã·ã¥ããŒãïŒããã·ã¥ããŒããã«ã¹ã¿ãã€ãºããæ©èœã«ãããããžãã¹ã«ãšã£ãŠæãéèŠãªã¡ããªã¯ã¹ã«éäžã§ããŸãã
- ã¢ã©ãŒããšéç¥ïŒèªååãããã¢ã©ãŒããšéç¥ã«ãããé倧ãªããã©ãŒãã³ã¹ã®åé¡ãéç¥ãããå³åº§ã«å¯Ÿå¿ããããšãã§ããŸããäŸãã°ãå¹³åããŒãžèªã¿èŸŒã¿æéãç¹å®ãããå€ãè¶ ããå Žåã«ã¢ã©ãŒããããªã¬ãŒã§ããŸãã
- å±¥æŽããŒã¿åæïŒéå»ã®ããã©ãŒãã³ã¹ããŒã¿ãåæããããšã§ãé·æçãªãã¬ã³ãããã¿ãŒã³ãç¹å®ããã®ã«åœ¹ç«ã¡ãŸãããã®æ å ±ã¯ãã¢ããªã±ãŒã·ã§ã³ãæé©åããå°æ¥ã®ããã©ãŒãã³ã¹åé¡ãæªç¶ã«é²ãããã«äœ¿çšã§ããŸãã
äŸïŒäžççã«å±éããeã³ããŒã¹ãã©ãããã©ãŒã ãèããŠã¿ãŸãããããªã¢ã«ã¿ã€ã åæããã·ã¥ããŒãã¯ãããŒãžèªã¿èŸŒã¿æéãååŒæåçããšã©ãŒçãªã©ã®ããã©ãŒãã³ã¹ã¡ããªã¯ã¹ãå°åå¥ã«ã»ã°ã¡ã³ãåããŠè¡šç€ºã§ããŸããç¹å®ã®å°åã§ãšã©ãŒçãæ¥äžæããå ŽåãããŒã ã¯å³åº§ã«åå ã調æ»ã§ããŸããããã¯ããããã¯ãŒã¯ã®åé¡ãå°åãµãŒããŒã®åé¡ããŸãã¯ããŒã«ã©ã€ãºçã¢ããªã±ãŒã·ã§ã³ã®ãã°ã«é¢é£ããŠããå¯èœæ§ããããŸãã
2. ãšã©ãŒè¿œè·¡
ãšã©ãŒè¿œè·¡ããŒã«ã¯ãã¢ããªã±ãŒã·ã§ã³ã§çºçããJavaScriptãšã©ãŒãèªåçã«ãã£ããã£ããŠå ±åããŸããããã«ããããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ã«åœ±é¿ãäžããŠãããã°ãè¿ éã«ç¹å®ããä¿®æ£ããããšãã§ããŸãã
äž»ãªæ©èœïŒ
- èªåãšã©ãŒãã£ããã£ïŒãšã©ãŒè¿œè·¡ããŒã«ã¯ãã¹ã¿ãã¯ãã¬ãŒã¹ããŠãŒã¶ãŒæ å ±ããã©ãŠã¶ã®è©³çްãå«ãJavaScriptãšã©ãŒãèªåçã«ãã£ããã£ããŸãã
- ãšã©ãŒã®ã°ã«ãŒãåãšéè€æé€ïŒãšã©ãŒã¯ã°ã«ãŒãåãããéè€æé€ãããããšã§ãã€ãºãæžãããåé¡ã®æ ¹æ¬åå ãç¹å®ããããããŸããäŸãã°ãç°ãªããŠãŒã¶ãŒããã®åããšã©ãŒã®è€æ°çºçã¯äžç·ã«ã°ã«ãŒãåãããŸãã
- ãœãŒã¹ãããã®ãµããŒãïŒãœãŒã¹ãããã®ãµããŒãã«ãããæå°åã»é£èªåãããã³ãŒãããããã°ã§ããŸãã
- ãŠãŒã¶ãŒã³ã³ããã¹ãïŒãšã©ãŒè¿œè·¡ããŒã«ã¯ããŠãŒã¶ãŒIDãã¡ãŒã«ã¢ãã¬ã¹ãããã€ã¹æ å ±ãªã©ã®ãŠãŒã¶ãŒã³ã³ããã¹ãããã£ããã£ããŠããšã©ãŒã®åçŸãšä¿®æ£ã«åœ¹ç«ãŠãããšãã§ããŸãã
äŸïŒäžçäžã®é¡§å®¢ã䜿çšããéèã¢ããªã±ãŒã·ã§ã³ã§ãç¹å®ã®ååŒããã»ã¹äžã«ãšã©ãŒãçºçããŸãããšã©ãŒè¿œè·¡ããŒã«ã¯ããŠãŒã¶ãŒã®å Žæããã©ãŠã¶ã®ããŒãžã§ã³ããšã©ãŒãçºçããååŒã®ç¹å®ã®ã¹ããããªã©ããšã©ãŒã®è©³çްããã£ããã£ããŸãããã®æ å ±ã«ãããéçºããŒã ã¯ãã°ãè¿ éã«ç¹å®ã»ä¿®æ£ããä»ã®ãŠãŒã¶ãŒã®ååŒãžã®ãããªãæ··ä¹±ãé²ãããšãã§ããŸãã
3. ããã©ãŒãã³ã¹ææš
ããã©ãŒãã³ã¹ææšãåéã»åæããããšã§ãã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ã«é¢ãã貎éãªæŽå¯ãåŸãããŸãããããã®ææšã¯ãããã«ããã¯ãç¹å®ããããã©ãŒãã³ã¹ãæé©åããããã«äœ¿çšã§ããŸãã
ç£èŠãã¹ãäž»èŠãªææšïŒ
- ããŒãžèªã¿èŸŒã¿æéïŒãŠã§ãããŒãžãå®å šã«èªã¿èŸŒãŸãããŸã§ã®æéãããã¯ãŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ã«ãšã£ãŠéèŠãªææšã§ãã
- æåã®1ãã€ããŸã§ã®æéïŒTTFBïŒïŒãµãŒããŒããããŒã¿ã®æåã®1ãã€ããåä¿¡ãããŸã§ã®æéããã®ææšã¯ãµãŒããŒã®å¿çæéãæž¬å®ããŸãã
- æåã®ã³ã³ãã³ãã®æç»ïŒFCPïŒïŒæåã®ã³ã³ãã³ãïŒäŸïŒããã¹ããç»åïŒãããŒãžã«ã¬ã³ããªã³ã°ããããŸã§ã®æéã
- æå€§ã³ã³ãã³ãã®æç»ïŒLCPïŒïŒæå€§ã®ã³ã³ãã³ãèŠçŽ ïŒäŸïŒç»åãåç»ïŒãããŒãžã«ã¬ã³ããªã³ã°ããããŸã§ã®æéãããã¯ãŠãŒã¶ãŒãèªã¿èŸŒã¿é床ãäœæããã®ã«åœ¹ç«ã¡ãŸãã
- ååå ¥åé å»¶ïŒFIDïŒïŒãŠãŒã¶ãŒã®æåã®ã€ã³ã¿ã©ã¯ã·ã§ã³ïŒäŸïŒãã¿ã³ã®ã¯ãªãã¯ããªã³ã¯ã®ã¿ããïŒã«ãã©ãŠã¶ãå¿çãããŸã§ã®æéãããã¯ã€ã³ã¿ã©ã¯ãã£ãæ§ã枬å®ããŸãã
- 环ç©ã¬ã€ã¢ãŠãã·ããïŒCLSïŒïŒäºæããªãã¬ã€ã¢ãŠãã·ããã®éãå®éåããããšã§ãããŒãžã®èŠèŠçãªå®å®æ§ã枬å®ããŸãã
- JavaScriptå®è¡æéïŒJavaScriptã³ãŒããå®è¡ããããŸã§ã«ãããæéã
- HTTPãªã¯ãšã¹ãã®é å»¶ïŒå€éšãªãœãŒã¹ãžã®HTTPãªã¯ãšã¹ããè¡ãã®ã«ãããæéã
- ãªãœãŒã¹èªã¿èŸŒã¿æéïŒç»åãCSSãJavaScriptãã¡ã€ã«ãªã©ã®ãªãœãŒã¹ãèªã¿èŸŒãã®ã«ãããæéã
- ã¡ã¢ãªäœ¿çšéïŒã¢ããªã±ãŒã·ã§ã³ã䜿çšããã¡ã¢ãªéãæž¬å®ããŸããé«ãã¡ã¢ãªäœ¿çšéã¯ããã©ãŒãã³ã¹åé¡ã«ã€ãªããå¯èœæ§ããããŸãã
- CPU䜿çšçïŒã¢ããªã±ãŒã·ã§ã³ã䜿çšããCPUã®éãæž¬å®ããŸããé«ãCPU䜿çšçãããã©ãŒãã³ã¹åé¡ã«ã€ãªããå¯èœæ§ããããŸãã
äŸïŒæ§ã ãªåœã®ãŠãŒã¶ãŒããããœãŒã·ã£ã«ã¡ãã£ã¢ãã©ãããã©ãŒã ã§ãã€ã³ã¿ãŒãããæ¥ç¶ãé ãå°åã§LCPïŒæå€§ã³ã³ãã³ãã®æç»ïŒææšãèããé«ãããšã«æ°ã¥ããŸããããã«å¯ŸåŠããããã圌ãã¯ç»åã®å§çž®ããã³ã³ãã³ãé ä¿¡ãããã¯ãŒã¯ïŒCDNïŒã䜿çšããŠãããã®å°åã®ãŠãŒã¶ãŒã«è¿ãå Žæã§ç»åããã£ãã·ã¥ãããªã©ãç»åæé©åæè¡ãå®è£ ããŸããããã«ãããLCPãççž®ãããæ¥ç¶ãé ããŠãŒã¶ãŒã®ãŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãåäžããŸãã
4. ããã³ããšã³ãç£èŠããŒã«
ããã³ããšã³ãç£èŠããŒã«ã¯ããã©ãŠã¶ã§å®è¡ãããŠããJavaScriptã³ãŒãã®ããã©ãŒãã³ã¹ã«é¢ããæŽå¯ãæäŸããŸãããããã®ããŒã«ã¯ãå®è¡ãé ãã³ãŒããã¡ã¢ãªãªãŒã¯ããã®ä»ã®ããã©ãŒãã³ã¹åé¡ãç¹å®ããã®ã«åœ¹ç«ã¡ãŸãã
äž»ãªæ©èœïŒ
- ããã©ãŒãã³ã¹ãããã¡ã€ãªã³ã°ïŒããã©ãŒãã³ã¹ãããã¡ã€ãªã³ã°ããŒã«ã䜿çšãããšãæãå€ãã®CPUæéãšã¡ã¢ãªãæ¶è²»ããŠããã³ãŒããç¹å®ã§ããŸãã
- ã¡ã¢ãªãªãŒã¯æ€åºïŒã¡ã¢ãªãªãŒã¯æ€åºããŒã«ã¯ãæéãšãšãã«ããã©ãŒãã³ã¹ã®åé¡ãåŒãèµ·ããå¯èœæ§ãããã¡ã¢ãªãªãŒã¯ãç¹å®ããä¿®æ£ããã®ã«åœ¹ç«ã¡ãŸãã
- ãããã¯ãŒã¯ç£èŠïŒãããã¯ãŒã¯ç£èŠããŒã«ã䜿çšãããšãHTTPãªã¯ãšã¹ãã®ããã©ãŒãã³ã¹ãç£èŠãããããã¯ãŒã¯ã®ããã«ããã¯ãç¹å®ã§ããŸãã
- ãŠãŒã¶ãŒã»ãã·ã§ã³èšé²ïŒãŠãŒã¶ãŒã»ãã·ã§ã³èšé²ã«ããããŠãŒã¶ãŒã»ãã·ã§ã³ãèšé²ããŠåçããããã©ãŒãã³ã¹ã®åé¡ãç¹å®ããŠãããã°ããããšãã§ããŸãã
äŸïŒãªã³ã©ã€ã³ã²ãŒã ãã©ãããã©ãŒã ã§ãäžéšã®ãŠãŒã¶ãŒãã²ãŒã ãã¬ã€äžã«ã©ã°ãçµéšããŠããããšã«æ°ã¥ããŸããããã³ããšã³ãç£èŠããŒã«ã䜿çšããŠãã²ãŒã èŠçŽ ã®ã¬ã³ããªã³ã°ãæ åœããç¹å®ã®JavaScript颿°ã«ã¡ã¢ãªãªãŒã¯ãããããšãç¹å®ããŸããã¡ã¢ãªãªãŒã¯ãä¿®æ£ããããšã§ãã²ãŒã ã®ããã©ãŒãã³ã¹ãåäžããããã¹ãŠã®ãŠãŒã¶ãŒã«ããã¹ã ãŒãºãªã²ãŒã äœéšãæäŸããŸãã
é©åãªããŒã«ãšãã¯ãããžãŒã®éžæ
å©çšå¯èœãªJavaScriptããã©ãŒãã³ã¹ç£èŠããŒã«ããã¯ãããžãŒã¯æ°å€ããããŸããããªãã®çµç¹ã«ãšã£ãŠæé©ãªéžæã¯ãç¹å®ã®ããŒãºãšèŠä»¶ã«äŸåããŸãã
èæ ®ãã¹ãèŠçŽ ïŒ
- ã¹ã±ãŒã©ããªãã£ïŒããŒã«ã¯ãã¢ããªã±ãŒã·ã§ã³ãåãåããã©ãã£ãã¯ã®éãåŠçã§ããå¿ èŠããããŸãã
- 䜿ããããïŒããŒã«ã¯ã䜿ããããèšå®ãç°¡åã§ããã¹ãã§ãã
- çµ±åïŒããŒã«ã¯ãæ¢åã®éçºããã³ãããã€ã®ã¯ãŒã¯ãããŒãšçµ±åã§ããå¿ èŠããããŸãã
- ã³ã¹ãïŒããŒã«ã®ã³ã¹ãã¯äºç®å ã§ãªããã°ãªããŸããã
- æ©èœïŒããŒã«ã¯ãã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ãç£èŠããããã«å¿ èŠãªæ©èœãæäŸããå¿ èŠããããŸãã
人æ°ã®ããŒã«ïŒ
- SentryïŒäººæ°ã®ãããšã©ãŒè¿œè·¡ããã³ããã©ãŒãã³ã¹ç£èŠããŒã«ã
- New RelicïŒå æ¬çãªããã©ãŒãã³ã¹ç£èŠãã©ãããã©ãŒã ã
- DatadogïŒã¯ã©ãŠãã¢ããªã±ãŒã·ã§ã³åãã®ç£èŠããã³ã»ãã¥ãªãã£ãã©ãããã©ãŒã ã
- RaygunïŒãšã©ãŒè¿œè·¡ããã³ããã©ãŒãã³ã¹ç£èŠããŒã«ã
- RollbarïŒãšã©ãŒè¿œè·¡ããã³ãããã°ãã©ãããã©ãŒã ã
- Google PageSpeed InsightsïŒãµã€ãã®é床ãåæããæ¹åã®ããã®ææ¡ãæäŸããŸãã
- WebPageTestïŒè€æ°ã®å ŽæãããŠã§ããµã€ãã®ããã©ãŒãã³ã¹ããã¹ãããããã®ç¡æã®ãªã³ã©ã€ã³ããŒã«ã
ããã©ãŒãã³ã¹ç£èŠæŠç¥ã®å®è£
æåããããã©ãŒãã³ã¹ç£èŠæŠç¥ãå®è£ ããã«ã¯ãäœç³»çãªã¢ãããŒããå¿ èŠã§ãã
- äž»èŠæ¥çžŸè©äŸ¡ææšïŒKPIïŒã®å®çŸ©ïŒããžãã¹ã«ãšã£ãŠæãéèŠãªäž»èŠæ¥çžŸè©äŸ¡ææšãç¹å®ããŸããäŸãšããŠã¯ãããŒãžèªã¿èŸŒã¿æéããšã©ãŒçãã³ã³ããŒãžã§ã³çãªã©ããããŸãã
- ããã©ãŒãã³ã¹ããžã§ããã®èšå®ïŒKPIã®ããã©ãŒãã³ã¹ããžã§ãããèšå®ããŸããããã«ãããããã©ãŒãã³ã¹ãäœäžããŠããææãç¹å®ããã®ã«åœ¹ç«ã¡ãŸããäŸãã°ãããŒãžèªã¿èŸŒã¿æéã«2ç§ã®ããžã§ãããèšå®ããŸãã
- ç£èŠããŒã«ã®å®è£ ïŒKPIã远跡ããããã«é©åãªç£èŠããŒã«ãéžæããå®è£ ããŸãã
- ã¢ã©ãŒããšéç¥ã®èšå®ïŒé倧ãªããã©ãŒãã³ã¹ã®åé¡ãéç¥ãããããã«ã¢ã©ãŒããšéç¥ãèšå®ããŸãã
- ããã©ãŒãã³ã¹ããŒã¿ã®å®æçãªã¬ãã¥ãŒïŒå®æçã«ããã©ãŒãã³ã¹ããŒã¿ãã¬ãã¥ãŒããŠããã¬ã³ãããã¿ãŒã³ãç¹å®ããŸãã
- ããã©ãŒãã³ã¹ã®æé©åïŒããã©ãŒãã³ã¹ããŒã¿ã®åæã«åºã¥ããŠãã¢ããªã±ãŒã·ã§ã³ãæé©åããŠããã©ãŒãã³ã¹ãåäžãããŸãã
- ç¶ç¶çãªããã©ãŒãã³ã¹ç£èŠïŒæé©åã广çã§ããããšã確èªããæ°ããªããã©ãŒãã³ã¹ã®åé¡ãç¹å®ããããã«ãããã©ãŒãã³ã¹ãç¶ç¶çã«ç£èŠããŸãã
JavaScriptããã©ãŒãã³ã¹æé©åã®ãã¹ããã©ã¯ãã£ã¹
JavaScriptã®ããã©ãŒãã³ã¹ãæé©åããããã®ãã¹ããã©ã¯ãã£ã¹ãããã€ã玹ä»ããŸãã
- HTTPãªã¯ãšã¹ãã®æå°åïŒCSSãšJavaScriptãã¡ã€ã«ãçµåããCSSã¹ãã©ã€ãã䜿çšããç»åãæé©åããããšã§ãHTTPãªã¯ãšã¹ãã®æ°ãæžãããŸãã
- ç»åã®æé©åïŒç»åãå§çž®ããé©åãªãã¡ã€ã«åœ¢åŒã䜿çšããã¬ã¹ãã³ã·ãç»åã䜿çšããããšã§ç»åãæé©åããŸãã
- ã³ã³ãã³ãé ä¿¡ãããã¯ãŒã¯ïŒCDNïŒã®äœ¿çšïŒCDNã䜿çšããŠéçã¢ã»ããããŠãŒã¶ãŒã®è¿ãã«ãã£ãã·ã¥ããŸãã
- ã³ãŒãã®æå°åãšé£èªåïŒã³ãŒããæå°åã»é£èªåããŠãã¡ã€ã«ãµã€ãºãåæžããã»ãã¥ãªãã£ãåäžãããŸãã
- ç»åããã®ä»ã®ãªãœãŒã¹ã®é å»¶èªã¿èŸŒã¿ïŒç»åããã®ä»ã®ãªãœãŒã¹ãé å»¶èªã¿èŸŒã¿ããŠãåæããŒãžã®èªã¿èŸŒã¿æéãæ¹åããŸãã
- JavaScriptã³ãŒãã®æé©åïŒäžèŠãªã«ãŒããé¿ããå¹ççãªã¢ã«ãŽãªãºã ã䜿çšããé »ç¹ã«äœ¿çšãããããŒã¿ããã£ãã·ã¥ããããšã§JavaScriptã³ãŒããæé©åããŸãã
- éåæèªã¿èŸŒã¿ã®äœ¿çšïŒJavaScriptãã¡ã€ã«ãéåæã§èªã¿èŸŒã¿ãããŒãžã®ã¬ã³ããªã³ã°ããããã¯ããªãããã«ããŸãã
- éèŠã§ãªããªãœãŒã¹ã®èªã¿èŸŒã¿ã®é å»¶ïŒããŒãžã®èªã¿èŸŒã¿ãå®äºããåŸãŸã§ãéèŠã§ãªããªãœãŒã¹ã®èªã¿èŸŒã¿ãé å»¶ãããŸãã
- é床ãªDOMæäœã®åé¿ïŒDOMæäœã¯ããã©ãŒãã³ã¹ã®ããã«ããã¯ã«ãªãå¯èœæ§ããããããæå°éã«æããŸãã
- ã³ãŒãã®ãããã¡ã€ãªã³ã°ïŒãããã¡ã€ãªã³ã°ããŒã«ã䜿çšããŠãã³ãŒãã®ããã©ãŒãã³ã¹ããã«ããã¯ãç¹å®ããŸãã
äŸïŒå€æ°ã®ç»åãåºåã衚瀺ãããã¥ãŒã¹ãµã€ããèããŠã¿ãŸããããç»åã®é å»¶èªã¿èŸŒã¿ãå®è£ ããããšã§ãæåã«ãŠãŒã¶ãŒã®ãã¥ãŒããŒãã«è¡šç€ºãããŠããç»åã®ã¿ãèªã¿èŸŒãŸããŸãããŠãŒã¶ãŒãããŒãžãäžã«ã¹ã¯ããŒã«ãããšã远å ã®ç»åããªã³ããã³ãã§èªã¿èŸŒãŸããŸããããã«ãããç¹ã«åž¯åå¹ ãéãããŠããã¢ãã€ã«ããã€ã¹ã®ãŠãŒã¶ãŒã«ãšã£ãŠãåæããŒãžã®èªã¿èŸŒã¿æéãå€§å¹ ã«ççž®ããããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãåäžããŸãã
ããã©ãŒãã³ã¹ç£èŠã«ãããã°ããŒãã«ãªèæ ®äºé
ã°ããŒãã«ãªãªãŒãã£ãšã³ã¹åãã«ããã©ãŒãã³ã¹ãç£èŠããå Žåããããã¯ãŒã¯ã®é å»¶ãããã€ã¹ã®å€æ§æ§ãå°åå·®ãªã©ã®èŠå ãèæ ®ããããšãéèŠã§ãã
- ãããã¯ãŒã¯ã®é å»¶ïŒå°ççãªå Žæãç°ãªããŠãŒã¶ãŒã¯ãç°ãªãã¬ãã«ã®ãããã¯ãŒã¯é å»¶ãçµéšããå¯èœæ§ããããŸããCDNã䜿çšããŠã³ã³ãã³ãããŠãŒã¶ãŒã®è¿ãã«ãã£ãã·ã¥ããäœåž¯åå¹ æ¥ç¶åãã«ã¢ããªã±ãŒã·ã§ã³ãæé©åããŸãã
- ããã€ã¹ã®å€æ§æ§ïŒãŠãŒã¶ãŒã¯ãã¹ããŒããã©ã³ãã¿ãã¬ããããã¹ã¯ããããªã©ãããŸããŸãªããã€ã¹ããã¢ããªã±ãŒã·ã§ã³ã«ã¢ã¯ã»ã¹ããå¯èœæ§ããããŸããããŸããŸãªç»é¢ãµã€ãºãšããã€ã¹æ©èœã«åãããŠã¢ããªã±ãŒã·ã§ã³ãæé©åããŸãã
- å°åå·®ïŒå°åã«ãã£ãŠããã©ãŒãã³ã¹ã®æåŸ å€ã奜ã¿ãç°ãªãå ŽåããããŸããç°ãªãå°åã®ãŠãŒã¶ãŒã®ç¹å®ã®ããŒãºã«åãããŠã¢ããªã±ãŒã·ã§ã³ãã«ã¹ã¿ãã€ãºããããšãæ€èšããŠãã ãããäŸãã°ãããŒã«ã©ã€ãºãããã³ã³ãã³ãã䜿çšãããŠãŒã¶ãŒã€ã³ã¿ãŒãã§ãŒã¹ãçŸå°ã®èšèªãæåçæ £ç¿ã«é©åãããŸãã
- ã¿ã€ã ãŸãŒã³ïŒããã©ãŒãã³ã¹ããŒã¿ãåæããéã¯ãã¿ã€ã ãŸãŒã³ã«æ³šæããŠãã ãããç£èŠããŒã«ãããŒã¿ãäžè²«ããã¿ã€ã ãŸãŒã³ã§è¡šç€ºããããã«èšå®ãããŠããããšã確èªããŠãã ããã
çµè«
å ç¢ãªJavaScriptããã©ãŒãã³ã¹ç£èŠã€ã³ãã©ã¹ãã©ã¯ãã£ã¯ãåªãããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãæäŸããããžãã¹ã®æåãéæããããã«äžå¯æ¬ ã§ãããã®ã¬ã€ãã§æŠèª¬ããæŠç¥ãšãã¹ããã©ã¯ãã£ã¹ãå®è£ ããããšã§ãããã©ãŒãã³ã¹ã®åé¡ãç©æ¥µçã«ç¹å®ã»è§£æ±ºããé床ãšä¿¡é Œæ§ã®ããã«ã¢ããªã±ãŒã·ã§ã³ãæé©åããäžçäžã®ã©ãã«ããŠããŠãŒã¶ãŒãããžãã£ããªäœéšãã§ããããã«ä¿èšŒã§ããŸãã
å æ¬çãªããã©ãŒãã³ã¹ç£èŠãœãªã¥ãŒã·ã§ã³ãžã®æè³ãšãã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ãç¶ç¶çã«ç£èŠããããšã¯ããã幞ããªãŠãŒã¶ãŒãã³ã³ããŒãžã§ã³ã®å¢å ããããŠããžãã¹ææã®åäžãšãã圢ã§å©çãããããç¶ç¶çãªããã»ã¹ã§ãã