WCAGãªã©ã®åœéçãªã¢ã¯ã»ã·ããªãã£åºæºãžã®æºæ ã確å®ã«ããããã³ããšã³ãã®ã¢ã¯ã»ã·ããªãã£ãã¹ããèªååããããã®å æ¬çãªã¬ã€ããå®è·µçãªæŠç¥ãããŒã«ã玹ä»ããŸãã
ããã³ããšã³ãã®ã¢ã¯ã»ã·ããªãã£èªååïŒãã¹ããšã³ã³ãã©ã€ã¢ã³ã¹æ€èšŒ
仿¥ã®ããžã¿ã«ç°å¢ã«ãããŠãé害ãæã€äººã ãå«ã誰ãããŠã§ããµã€ãããŠã§ãã¢ããªã±ãŒã·ã§ã³ã«ã¢ã¯ã»ã¹ã§ããããã«ããããšã¯ãåãªããã¹ããã©ã¯ãã£ã¹ã§ã¯ãªãããã°ãã°æ³çãªèŠä»¶ã§ããããŸããWebã¢ã¯ã»ã·ããªãã£ã¯ãå æ¬æ§ã確ä¿ãããŠãŒã¶ãŒå±€ãæ¡å€§ããäŒæ¥ã®ç€ŸäŒç責任ã瀺ãäžã§éåžžã«éèŠã§ãããã®èšäºã§ã¯ãããã³ããšã³ãã®ã¢ã¯ã»ã·ããªãã£èªååã«é¢ããå æ¬çãªã¬ã€ããæäŸããåœéåºæºãæºããããã®ãã¹ãææ³ãšã³ã³ãã©ã€ã¢ã³ã¹æ€èšŒã«çŠç¹ãåœãŠãŸãã
ãªãããã³ããšã³ãã®ã¢ã¯ã»ã·ããªãã£ãã¹ããèªååããã®ãïŒ
æåã«ããã¢ã¯ã»ã·ããªãã£ãã¹ããéèŠã§ãããæéããããããã¥ãŒãã³ãšã©ãŒãçºçãããããšããæ¬ ç¹ããããŸããèªååã«ã¯ãããã€ãã®éèŠãªå©ç¹ããããŸãïŒ
- å¹çæ§ïŒ èªåãã¹ãã¯è¿ éãã€ç¹°ãè¿ãå®è¡ã§ããç¶ç¶çã€ã³ãã°ã¬ãŒã·ã§ã³ãšç¶ç¶çããªããªãŒïŒCI/CDïŒãã€ãã©ã€ã³ãå¯èœã«ããŸãã
- äžè²«æ§ïŒ èªåãã¹ãã¯ãã¢ã¯ã»ã·ããªãã£åºæºã«å¯Ÿããäžè²«ããè©äŸ¡ãä¿èšŒããæœåšçãªåé¡ãèŠèœãšããªã¹ã¯ãäœæžããŸãã
- æ©æçºèŠïŒ éçºã©ã€ããµã€ã¯ã«ã®æ©ã段éã§ã¢ã¯ã»ã·ããªãã£ã®åé¡ãç¹å®ããããšã§ãä¿®æ£ã³ã¹ããšåŽåãå€§å¹ ã«åæžã§ããŸãã
- ã¹ã±ãŒã©ããªãã£ïŒ èªåãã¹ãã¯ãå€§èŠæš¡ã§è€éãªãŠã§ãã¢ããªã±ãŒã·ã§ã³ã«ã容æã«å¯Ÿå¿ã§ããŸãã
- è²»çšå¯Ÿå¹æïŒ åææè³ã¯å¿ èŠã§ãããèªåãã¹ãã¯æçµçã«ã¢ã¯ã»ã·ããªãã£ã®ä¿®æ£ãæ³çã³ã³ãã©ã€ã¢ã³ã¹ã«é¢é£ããé·æçãªã³ã¹ããåæžããŸãã
åœéçãªã¢ã¯ã»ã·ããªãã£åºæºã®çè§£ïŒWCAGãšãã®å ãž
ãŠã§ãã³ã³ãã³ãã»ã¢ã¯ã»ã·ããªãã£ã»ã¬ã€ãã©ã€ã³ïŒWCAGïŒã¯ãWebã¢ã¯ã»ã·ããªãã£ã«é¢ããåœéçã«èªããããæšæºã§ããWCAGã¯äžé£ã®æååºæºãæäŸããAãAAãAAAã®3ã€ã®é©åã¬ãã«ã«åé¡ãããŠããŸããã»ãšãã©ã®çµç¹ã¯ãWCAG 2.1 AAãžã®æºæ ãç®æããŠããŸããããã¯ãå®çšçã§åºãåãå ¥ããããŠããã¢ã¯ã»ã·ããªãã£ã¬ãã«ã ããã§ãã
WCAG以å€ã«ããåœãå°åã«ãã£ãŠã¯ç¬èªã®ã¢ã¯ã»ã·ããªãã£é¢é£æ³èŠãååšããŸããäŸïŒ
- ã»ã¯ã·ã§ã³508ïŒç±³åœïŒïŒ é£éŠæ©é¢ã®é»åæ å ±æè¡ãé害ãæã€äººã ã«ãã¢ã¯ã»ã¹å¯èœã§ããããšã矩åä»ããŠããŸããç±³åœã®ã¢ã¯ã»ã·ããªãã£èŠä»¶ã®åºæºãšèŠãªãããããšãå€ãã§ãã
- ãªã³ã¿ãªãªå·é害è ã¢ã¯ã»ã·ããªãã£æ³ïŒAODAïŒïŒã«ããïŒïŒ ãªã³ã¿ãªãªå·ã®ãã¹ãŠã®çµç¹ã«ããŠã§ããµã€ããã¢ã¯ã»ã·ãã«ã«ããããšã矩åä»ããŠããŸãã
- 欧å·ã¢ã¯ã»ã·ããªãã£æ³ïŒEAAïŒïŒæ¬§å·é£åïŒïŒ EUå çåœå šäœã§ããŠã§ããµã€ããã¢ãã€ã«ã¢ããªã±ãŒã·ã§ã³ãå«ãå¹ åºã補åããµãŒãã¹ã«å¯Ÿããã¢ã¯ã»ã·ããªãã£èŠä»¶ãå®ããŠããŸãã
- é害è å·®å¥çŠæ¢æ³ïŒDDAïŒïŒãªãŒã¹ãã©ãªã¢ïŒïŒ ããžã¿ã«é åãå«ããé害ãæã€äººã ã«å¯Ÿããå·®å¥ãçŠæ¢ããŠããŸãã
- æ¥æ¬ç£æ¥èŠæ ŒïŒJISïŒX 8341-3ïŒæ¥æ¬ïŒïŒ WCAGãšå¯æ¥ã«é£æºããŠãããWebã³ã³ãã³ãã®ã¢ã¯ã»ã·ããªãã£ã«é¢ããæ¥æ¬ã®èŠæ Œã§ãã
ãããã®åºæºãçè§£ããããšã¯ãå æ¬çã§æºæ ããWebãšã¯ã¹ããªãšã³ã¹ãæ§ç¯ããããã«äžå¯æ¬ ã§ããã¿ãŒã²ãããªãŒãã£ãšã³ã¹ãšåœŒããå± äœããå°åããåºæºã®éžæã«å€§ãã圱é¿ããŸãã
ããã³ããšã³ãã®ã¢ã¯ã»ã·ããªãã£ãã¹ããèªååããããã®æŠç¥
广çãªã¢ã¯ã»ã·ããªãã£èªååã«ã¯ãéçºã©ã€ããµã€ã¯ã«ã®ããŸããŸãªæ®µéã«ãã¹ããçµ±åããå€è§çãªã¢ãããŒããå¿ èŠã§ãã
1. éçè§£æïŒãªã³ãã£ã³ã°ïŒ
ãªã³ã¿ãŒãšãåŒã°ããéçè§£æããŒã«ã¯ãã³ãŒããå®è¡ããã«åæããŸããã³ãŒãã®ãã¿ãŒã³ãèšå®ã«åºã¥ããŠãæœåšçãªã¢ã¯ã»ã·ããªãã£ã®åé¡ãç¹å®ã§ããŸãããããã®ããŒã«ã¯éåžžãéçºç°å¢ãCI/CDãã€ãã©ã€ã³ã«çµ±åãããŸãã
ããŒã«äŸïŒ
- eslint-plugin-jsx-a11yïŒ Reactã¢ããªã±ãŒã·ã§ã³ã§äººæ°ã®ESLintãã©ã°ã€ã³ã§ãJSXã³ãŒãã«ãããã¢ã¯ã»ã·ããªãã£ã®ãã¹ããã©ã¯ãã£ã¹ã匷å¶ããŸãã`img`ã¿ã°ã®`alt`屿§ã®æ¬ èœãäžååãªè²ã®ã³ã³ãã©ã¹ããARIA屿§ã®äžé©åãªäœ¿çšãªã©ã®åé¡ããã§ãã¯ããŸãã
- HTMLHintïŒ HTMLã®éçè§£æããŒã«ã§ãHTMLæšæºããã¹ããã©ã¯ãã£ã¹ã«åºã¥ããŠã¢ã¯ã»ã·ããªãã£éåãç¹å®ã§ããŸãã
- axe-lintïŒ axe-coreã¢ã¯ã»ã·ããªãã£ãã¹ããšã³ãžã³ãããŒã¹ã«ãããªã³ã¿ãŒã§ãã³ãŒãã£ã³ã°äžã«ãšãã£ã¿å ã§çŽæ¥ãã£ãŒãããã¯ãæäŸããŸãã
䜿çšäŸïŒeslint-plugin-jsx-a11yïŒïŒ
次ã®Reactã³ãŒããèããŠã¿ãŸãããïŒ
<img src="logo.png" />
eslint-plugin-jsx-a11yã¯ã`alt`屿§ãæ¬ èœããŠãããããããããšã©ãŒãšããŠãã©ã°ä»ãããŸããæ£ããã³ãŒãã¯æ¬¡ã®ããã«ãªããŸãïŒ
<img src="logo.png" alt="Company Logo" />
2. ãããã¬ã¹ãã©ãŠã¶ã«ããUIèªåãã¹ã
UIèªåãã¹ãã¯ããŠã§ããã©ãŠã¶å ã§ãŠãŒã¶ãŒã®æäœãã·ãã¥ã¬ãŒãããŠã¢ã¯ã»ã·ããªãã£ã®åé¡ãç¹å®ãããã®ã§ããChromeãFirefoxã®ãããªãããã¬ã¹ãã©ãŠã¶ã䜿çšãããšãã°ã©ãã£ã«ã«ãŠãŒã¶ãŒã€ã³ã¿ãŒãã§ãŒã¹ãªãã§ãããã®ãã¹ããå®è¡ã§ãããããCI/CDç°å¢ã«é©ããŠããŸãã
ããŒã«ïŒ
- axe-coreïŒ Deque Systemsã«ãã£ãŠéçºããããªãŒãã³ãœãŒã¹ã®ã¢ã¯ã»ã·ããªãã£ãã¹ããšã³ãžã³ã§ããWCAGããã®ä»ã®ã¢ã¯ã»ã·ããªãã£åºæºã«åºã¥ããå æ¬çãªã«ãŒã«ã»ãããæäŸããŸãã
- CypressïŒ axe-coreãšã·ãŒã ã¬ã¹ã«çµ±åã§ãã人æ°ã®JavaScriptãã¹ããã¬ãŒã ã¯ãŒã¯ã§ããã¢ã¯ã»ã·ããªãã£éåããã§ãã¯ãããšã³ãããŒãšã³ãã®ãã¹ããèšè¿°ã§ããŸãã
- Selenium WebDriverïŒ axe-coreãä»ã®ã¢ã¯ã»ã·ããªãã£ãã¹ãã©ã€ãã©ãªãšçµã¿åãããããšãã§ãããåºã䜿çšãããŠããããäžã€ã®ãã¹ããã¬ãŒã ã¯ãŒã¯ã§ããè€æ°ã®ãã©ãŠã¶ãããã°ã©ãã³ã°èšèªããµããŒãããŠããŸãã
- PlaywrightïŒ Microsoftãéçºãããã¢ãã³ãªWebã¢ããªåãã®ä¿¡é Œæ§ã®é«ããšã³ãããŒãšã³ããã¹ãçšãã¬ãŒã ã¯ãŒã¯ã§ããPlaywrightã¯ChromiumãFirefoxãWebKitããµããŒãããŠããŸãã
䜿çšäŸïŒCypressãšaxe-coreïŒïŒ
ãã®Cypressãã¹ãã¯ãaxe-coreã䜿çšããŠWebããŒãžã®ã¢ã¯ã»ã·ããªãã£ããã§ãã¯ããŸãïŒ
describe('Accessibility Test', () => {
it('Checks for WCAG AA violations', () => {
cy.visit('https://www.example.com');
cy.injectAxe();
cy.checkA11y(null, { // Optional context and options
runOnly: {
type: 'tag',
values: ['wcag2a', 'wcag2aa']
}
});
});
});
ãã®ãã¹ãã¯ä»¥äžã®ããšãè¡ããŸãïŒ
- æå®ãããURLã«ã¢ã¯ã»ã¹ããŸãã
- axe-coreã©ã€ãã©ãªãããŒãžã«æ¿å ¥ããŸãã
- WCAG 2.1ã®Aããã³AAåºæºã«åºã¥ããŠã¢ã¯ã»ã·ããªãã£ãã¹ããå®è¡ããŸãã
- éåãèŠã€ãã£ãå Žåããã¹ãã倱æãããŸãã
3. åçã¢ã¯ã»ã·ããªãã£åæ
åçã¢ã¯ã»ã·ããªãã£åæããŒã«ã¯ãå®è¡äžã®WebããŒãžã®ã¢ã¯ã»ã·ããªãã£ãåæããŸããéçè§£æãUIèªåãã¹ãã§ã¯æããã«ãªããªãããã©ãŒã«ã¹ç®¡çã®åé¡ããã¢ã¯ã»ã·ããªãã£ã®éå£ãšãªãåçãªã³ã³ãã³ãæŽæ°ãªã©ã®åé¡ãæ€åºã§ããŸãã
ããŒã«ïŒ
- axe DevToolsïŒ WebããŒãžãé²èŠ§ã»æäœããªãããªã¢ã«ã¿ã€ã ã§ã¢ã¯ã»ã·ããªãã£ã®ãã£ãŒãããã¯ãæäŸãããã©ãŠã¶æ¡åŒµæ©èœããã³ã³ãã³ãã©ã€ã³ããŒã«ã§ãã
- WAVE (Web Accessibility Evaluation Tool)ïŒ ãã©ãŠã¶å ã§çŽæ¥ã¢ã¯ã»ã·ããªãã£ã®åé¡ã«é¢ããèŠèŠçãªãã£ãŒãããã¯ãæäŸãããã©ãŠã¶æ¡åŒµæ©èœã§ããWebAIMã«ãã£ãŠéçºã»ç¶æãããŠããŸãã
- Siteimprove Accessibility CheckerïŒ èªåãã¹ããšæåãã¹ãã®äž¡æ¹ã®æ©èœãæäŸããå æ¬çãªã¢ã¯ã»ã·ããªãã£ãã¹ããã©ãããã©ãŒã ã§ãã
䜿çšäŸïŒaxe DevToolsïŒïŒ
Chromeã§axe DevToolsã䜿çšãããšããã©ãŠã¶ã®éçºè ããŒã«ããã«ã§çŽæ¥WebããŒãžãæ€æ»ããã¢ã¯ã»ã·ããªãã£éåãç¹å®ã§ããŸãããã®ããŒã«ã¯ãDOMå ã®å Žæãä¿®æ£ã®æšå¥šäºé ãªã©ãåéåã«é¢ããè©³çŽ°ãªæ å ±ãæäŸããŸãã
4. ã¢ã¯ã»ã·ããªãã£ã®ããã®ããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ã
ããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ãã¯ãUIãžã®å€æŽãæå³ããªãã¢ã¯ã»ã·ããªãã£ã®åé¡ãåŒãèµ·ãããªãããšãä¿èšŒããŸããããã¯ãã³ãŒãã®ãªãã¡ã¯ã¿ãªã³ã°ãUIã³ã³ããŒãã³ãã®æŽæ°æã«ç¹ã«éèŠã§ãã
ããŒã«ïŒ
- PercyïŒ UIã®ã¹ãããã·ã§ããããã£ããã£ããç°ãªããã«ãéã§æ¯èŒããŠèŠèŠçãªãªã°ã¬ãã·ã§ã³ãæ€åºããããžã¥ã¢ã«ã¬ãã¥ãŒãã©ãããã©ãŒã ã§ãã
- ApplitoolsïŒ AIã䜿çšããŠãã¢ã¯ã»ã·ããªãã£ã®åé¡ã瀺ãå¯èœæ§ã®ãã埮åŠãªèŠèŠçå·®ç°ãç¹å®ãããããäžã€ã®ããžã¥ã¢ã«ãã¹ããã©ãããã©ãŒã ã§ãã
- BackstopJSïŒ ç¡æã§ãªãŒãã³ãœãŒã¹ã®ããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ãããŒã«ã§ãã
ã¢ã¯ã»ã·ããªãã£ãã¹ããšã®çµ±åïŒ
ããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ãã¯äž»ã«èŠèŠçãªå€æŽã«çŠç¹ãåœãŠãŠããŸãããaxe-coreãä»ã®ã¢ã¯ã»ã·ããªãã£ãã¹ãã©ã€ãã©ãªãããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ãã®ã¯ãŒã¯ãããŒã«çµã¿èŸŒãããšã§ãã¢ã¯ã»ã·ããªãã£ãã¹ããšçµ±åã§ããŸããããã«ãããåããžã¥ã¢ã«ã¹ãããã·ã§ããã®ã¢ã¯ã»ã·ããªãã£ãèªåçã«ãã§ãã¯ããå°å ¥ãããå¯èœæ§ã®ããéåãç¹å®ã§ããŸãã
ã¢ã¯ã»ã·ããªãã£ãã¡ãŒã¹ããªCI/CDãã€ãã©ã€ã³ã®æ§ç¯
ã¢ã¯ã»ã·ããªãã£ãã¹ããCI/CDãã€ãã©ã€ã³ã«çµ±åããããšã¯ãç¶ç¶çãªã¢ã¯ã»ã·ããªãã£ã確ä¿ããããã«äžå¯æ¬ ã§ãã以äžã«æšå¥šãããã¯ãŒã¯ãããŒã瀺ããŸãïŒ
- ã³ãŒãã®ãªã³ãã£ã³ã°ïŒ éçºããã»ã¹ã®æ©ã段éã§æœåšçãªã¢ã¯ã»ã·ããªãã£ã®åé¡ãç¹å®ãããããã³ãããããšã«éçè§£æããŒã«ïŒäŸïŒeslint-plugin-jsx-a11yïŒãå®è¡ããŸãã
- åäœãã¹ãïŒ åã ã®ã³ã³ããŒãã³ããã¢ã¯ã»ã·ãã«ã§ããããšã確èªãããããåäœãã¹ãã«ã¢ã¯ã»ã·ããªãã£ãã§ãã¯ãçµ±åããŸãã
- UIèªåãã¹ãïŒ WCAGéåããã§ãã¯ããããããã«ãããšã«ãããã¬ã¹ãã©ãŠã¶ãšaxe-coreã䜿çšããŠUIèªåãã¹ããå®è¡ããŸãã
- ããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãã¹ãïŒ UIã®ããžã¥ã¢ã«ã¹ãããã·ã§ããããã£ããã£ããç°ãªããã«ãéã§æ¯èŒããŠãã¢ã¯ã»ã·ããªãã£ã®åé¡ã瀺ãå¯èœæ§ã®ããããžã¥ã¢ã«ãªã°ã¬ãã·ã§ã³ãæ€åºããŸãã
- æåãã¹ãïŒ èªåã§æ€åºã§ããªãåé¡ãç¹å®ãããããã¢ã¯ã»ã·ããªãã£å°éå®¶ãé害ãæã€ãŠãŒã¶ãŒã«ããæåãã¹ãã§èªåãã¹ããè£å®ããŸãã
CI/CDèšå®äŸïŒGitHub ActionsïŒïŒ
name: Accessibility Testing
on:
push:
branches: [ main ]
pull_request:
branches: [ main ]
jobs:
accessibility:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Set up Node.js
uses: actions/setup-node@v3
with:
node-version: 16
- name: Install dependencies
run: npm install
- name: Run ESLint with accessibility checks
run: npm run lint # Assuming you have a lint script in your package.json
- name: Run Cypress with axe-core
run: npm run cypress:run # Assuming you have a cypress run script
ããŒãºã«åã£ãé©åãªããŒã«ã®éžæ
ããªãã®çµç¹ã«æé©ãªã¢ã¯ã»ã·ããªãã£ãã¹ãããŒã«ã¯ãç¹å®ã®ããŒãºãäºç®ãæè¡çå°éç¥èã«ãã£ãŠç°ãªããŸããéžæããéã«ã¯ã次ã®èŠçŽ ãèæ ®ããŠãã ããïŒ
- ã«ãã¬ããžïŒ æºæ ããå¿ èŠã®ããã¢ã¯ã»ã·ããªãã£åºæºïŒäŸïŒWCAGãã»ã¯ã·ã§ã³508ïŒãããŒã«ãã«ããŒããŠããŸããïŒ
- æ£ç¢ºæ§ïŒ ããŒã«ã¯ã¢ã¯ã»ã·ããªãã£ã®åé¡ãã©ã®çšåºŠæ£ç¢ºã«ç¹å®ããŸããïŒ
- 䜿ããããïŒ ããŒã«ã¯äœ¿ãããããéçºã¯ãŒã¯ãããŒã«çµ±åããããã§ããïŒ
- ã¬ããŒãæ©èœïŒ ããŒã«ã¯ã¢ã¯ã»ã·ããªãã£éåã«é¢ããæç¢ºã§å®è¡å¯èœãªã¬ããŒããæäŸããŸããïŒ
- ã³ã¹ãïŒ ã©ã€ã»ã³ã¹æããã¬ãŒãã³ã°ããµããŒããå«ããããŒã«ã®ã³ã¹ãã¯ãããã§ããïŒ
- ã³ãã¥ããã£ãµããŒãïŒ ãµããŒããã¬ã€ãã³ã¹ãæäŸã§ãããããŒã«ã®åŒ·åãªã³ãã¥ããã£ã¯ãããŸããïŒ
æé©ãªã¢ã¯ã»ã·ããªãã£ã«ãã¬ããžãéæããããã«ã¯ãç°ãªãããŒã«ãçµã¿åãããŠäœ¿çšããããšããã°ãã°æšå¥šãããŸããäŸãã°ãæ©æçºèŠã®ããã«éçè§£æããŒã«ã䜿çšããæ¬¡ã«axe-coreã«ããUIèªåãã¹ããè¡ããæåãã¹ãã§è£å®ãããšãã£ãæ¹æ³ã§ãã
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