Accessible な実装を求めたら大変だった

by Yuichi Sugiyama

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Accessibleͳ  ࣮૷ΛٻΊͨΒ  େมͩͬͨ

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Who am I ‱ਿࢁ ༞Ұɹ@oogFranz ‱࢓ࣄ಺༰ •ϓϩάϥϚ •εΫϥϜϚελʔ •δϟζϕʔγετʢMASHݭָஂʣ

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Who am I ‱ਿࢁ ༞Ұɹ@oogFranz ‱࢓ࣄ಺༰ •ϓϩάϥϚ •εΫϥϜϚελʔ •δϟζϕʔγετʢMASHݭָஂʣ

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ϓϩάϥϚͷཱͪҐஔ • →HTMLͷ૊Έཱͯ͸σβΠφʔ • PG͸ԿΛ͢Δ͔ʁ • →Accessibleͳεςʔτͷ࣮૷ / / A

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• →HTMLͷ૊Έཱͯ͸σβΠφʔ • PG͸ԿΛ͢Δ͔ʁ • →Accessibleͳεςʔτͷ࣮૷ A D G / I / ϓϩάϥϚͷཱͪҐஔ

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PGͷཱͪҐஔ • →HTMLͷ૊Έཱͯ͸σβΠφʔ • PG͸ԿΛ͢Δ͔ʁ • →Accessibleͳεςʔτͷ࣮૷ A D G / I / ૢ࡞ՄೳͰݎ࿚ͳ6*ͷ࣮૷Λ୲౰

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࣮ྫ • ఱؾ༧ใͰશࠃ130Ҏ্ͷ஍ҬΛબ΂ΔπϦʔ

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࣮ྫ • ఱؾ༧ใͰશࠃ130Ҏ্ͷ஍ҬΛબ΂Δπ Ϧʔ ΞΫηγϏϦςΟରԠͰ ૝ఆ޻਺ͷഒɺ࣮૷ʹ͔͔ͬͯ͠·ͬͨ

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ͳʹʹ͕͔͔͔࣌ؒͬͨ • ΩʔϘʔυରԠ • State ͱ View ͷ࿈ಈ • ಈ࡞֬ೝͷ೉͠͞ ͜͏Ͱ͖ͯͨΒΑ͔ͬͨɺΛڞ༗͠·͢ʂ

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ΩʔϘʔυରԠ

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ΩʔϘʔυରԠ ಈ͖ΛҰͭҰ࣮ͭ૷

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ΩʔϘʔυରԠ ಈ͖ΛҰͭҰ࣮ͭ૷ Ωʔ਺ºૢ࡞ύʔπ෼࣮૷ ࣮૷ίετ͕Ұؾʹ;͘ΒΉɻɻɻ

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͜͏Ͱ͖ͯͨΒΑ͔ͬͨ • ΩʔϘʔυͰͲ͏ಈ͔ͤΔ΂͖͔ɺ  Λ͋Β͔͡Ί೺Ѳ͢Δ  https://www.w3.org/WAI/GL/wiki/ Using_ARIA_trees • ΑΓγϯϓϧͳUI͸ͳ͍͔ͷ௥ٻ

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State ͱ Viewͷ࿈ಈ

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State ͱ Viewͷ࿈ಈ

4UBUFʹ࿈ಈͯ͠7JFX༻ʹDMBTTΛ੾Γସ͑

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͜͏Ͱ͖ͯͨΒΑ͔ͬͨ • State ͱ View = ϓϩάϥϚʔ ͱ σβΠφʔ • σβΠφʔͱ࣮૷Λҙࣝͨ͠Viewͷ࡞੒ • aria-expandedΛCSSηϨΫλʹ࢖͏  ex.) li[aria-expanded=“true”]

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ಈ࡞֬ೝͷ೉͠͞ • ͏·͘ಈ͔ͳ͍࣌ʹԿͷ໰୊ͳͷ͔Θ͔Βͳ͍ • HTML͕ؒҧ͍ͬͯΔʁ • ϒϥ΢β͕ରԠ͍ͯ͠ͳ͍ʁ • ࢧԉٕज़͕ະରԠʁ • NVDA + ChromeͰಈ͚͘ͲVoiceOver + Safari  ͩͱಡΈ্͛ΒΕͳ͍ͱ͔͟Βʢٯ΋·ͨવΓʣ

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͜͏Ͱ͖ͯͨΒΑ͔ͬͨ • W3Cͷ࣮૷ྫͰ·ͣಈ࡞νΣοΫ • ϒϥ΢β/ࢧԉٕज़ͷ໰୊Λ͸΍ΊʹΩϟον͢Δ • ΘΓ͖Γେࣄ

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·ͱΊ • ϦονͳUI͸༻๏༻ྔΛकͬͯ࢖͏ • ΩʔϘʔυରԠ͸೦ೖΓʹ • σβΠφʔͱΑΓ࿈ܞ͍ͯͧ͘͠ • ΘΓ͖Γେࣄ