WAI-ARIAを活用したJavaScriptによるDOM操作

by Masayuki Maekawa

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8"*"3*"Λ׆༻ͨ͠ +BWB4DSJQUʹΑΔ%0.ૢ࡞ લ઒ণ޾

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8"*"3*" Θ͔Γ΍͍͢ʮ8"*"3*"ʯ࢓༷ղઆॻ  େ౻װ  IUUQTXXXBNB[PODPKQEQ#9,/7.

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rΘ͔Γ΍͍͢ʮ8"*"3*"ʯ࢓༷ղઆॻ l΢ΣϒΞϓϦέʔγϣϯʹ͓͚Δ༷ʑͳΞΫη γϏϦςΟ্ͷ໰୊Λղܾ͢ΔͨΊʹ༻ҙ͞Ε ͨͷ͕8"*"3*"Ͱ͢ɻ8"*"3*"͸)5.-ͷ࢓ ༷ͷҰ෦ͱͯ͠૊Έࠐ·Ε͓ͯΓɺ)5.-Ͱ࡞ ΒΕͨ΢ΣϒϖʔδͰ͋Ε͹͙͢ʹͰ΋࢖͍࢝ ΊΔ͜ͱ͕Ͱ͖·͢ɻz

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8"*"3*" w SPMFଐੑ w BSJB99999ଐੑ

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SPMFଐੑ ྫ͑͹ʝʝ

hoge
huga

͸ɺʮϦετʯΛϚʔΫΞοϓ͍ͯ͠·͕͢ɺ͜ͷ৔ ߹ʮVMʯ͸ʮSPMFlMJTUzʯɺʮMJʯ͸ʮSPMFlMJTUJUFNzʯ Λ͍࣋ͬͯΔ͜ͱʹͳΓ·͢ɻ

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SPMFଐੑ ͱ͜Ζ͕ɺॾࣄ৘ʹΑΓʝʝ

hoge

huga

ͳΜͯϚʔΫΞοϓʹͳͬͯ͠·ͬͨ৔߹ɻ  ʢ͋͘·Ͱ΋ۃ୺ͳྫͰ͢Αʣ  SPMFଐੑΛར༻ͯ͠ʝʝ

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SPMFଐੑ ͜ͷΑ͏ͳϚʔΫΞοϓͰҙຯͷ্ॻ͖͕ՄೳͰ͢

hoge

huga

ͱ͍͏ܗͰSPMFଐੑΛར༻ͯ͠ҙຯ෇͚ͷ্ॻ͖͕Մ ೳͰ͢ɻ7PJDF0WFSΛར༻ͯ͠6TFS"HFOU͕ͲͷΑ͏ʹ ೝࣝ͢Δ͔ࢼͯ͠Έ·͠ΐ͏ɻ

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σϞ

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SPMFଐੑ ౰વϦετ͚ͩͰ͸ͳ͘ɺ΄͔ͷ༷ʑͳSPMF͕༻ҙ͞ Ε͍ͯ·͢ɻྫ͑͹ʝʝ w OBWJHBUJPOˠOBW w NBJOˠNBJO w QSFTFOUBUJPOˠEJWTQBO ͳͲͳͲͳͲʝʝ

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SPMFଐੑ SPMFଐੑ͸ࠓճͷओ୊Ͱ͸ͳ͍ͷͰ͕͢ɺ΢ΣϒΞϓ ϦέʔγϣϯͰ͓ͦΒͨ͘͘͞Μग़ͯ͘Δ͍ͭ͜ʝʝ w CVUUPO ʹ͍ͭͯ͸ܰ͘σϞ͠·͢

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SPMFଐੑ ొ࿥͢Δ  ొ࿥͢Δ  ొ࿥͢Δ  ొ࿥͢Δ  ొ࿥͢Δ ͦΕͧΕͲͷΑ͏ʹ6"ʹѻΘΕΔ͔ʁ

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एׯԣಓͰ͕͢ʝ

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͜ͷσϞɺ  7PJDF0WFS੾ͬͨΒʝʝ

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UBCJOEFYlz  ʮΩʔϘʔυૢ࡞ʯͷཁ

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UBCJOEFYlz w ͜ͷࢦఆΛ͓ͯ͘͠ͱɺ)5.-ͷهड़ͷॱ൪ͰUBC ΩʔʹΑΔϑΥʔΧεΛ౰ͯͯ͘ΕΔɻ w TQBOͳͲͰૢ࡞Λ෇͚͍ͨ৔߹͸UBCJOEFYΛࢦఆ͠ ͭͭɺPOLFZQSFTTͷΠϕϯτΛऔΔ w ͦͷ৔߹LFZDPEF FOUFS ͳͲͰ൑ఆ

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SPMFଐੑ طଘͷʮ)5.-λάʯͷҙຯΛΑΓৄࡉʹͨ͠΋ͷ΋ ͋Γ·͢ɻྫ͑͹ʝʝ w TFBSDIˠݕࡧػೳͷ͋ΔྖҬ w EJSFDUPSZˠ੩తͳ໨࣍ͳͲ w UPPMCBSˠπʔϧόʔ ͳͲͳͲͳͲʝʝ

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ʝʝͱઆ໌͠΍͘͢  ਐΊ·͕ͨ͠ʝʝ

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SPMFଐੑ w ϥϯυϚʔΫϩʔϧ w จॻߏ଄ϩʔϧ w ΢ΟδΣοτϩʔϧ w ந৅ϩʔϧʢ࢖͍·ͤΜ͕ʣ ͱ͍ͬͨମܥతͳ෼ྨ͕͋Γ·͢ɻ

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SPMFଐੑ w શ෦Ͱछྨ w ༷ʑͳҙຯ෇͚ w ͲͷΑ͏ʹ6"ʹ͕ೝࣝͯ͠ಈ࡞͢ΔΑ͏ʹظ଴͞Ε ͍ͯΔ͔ɺ࣮ࡍͲ͏ͳͷ͔ʁ ۷Γ͕͍ͷ͋ΔྖҬͰ͢

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Θ͔Γ΍͍͢ʮ8"*"3*"ʯ࢓༷ղઆॻ  େ౻װ  IUUQBN[OUPH%TI8ˡΞϑΟ஫ҙ

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ίʔσΟϯά8FCΞΫηγϏϦςΟ  ϔΠυϯɾϐΧϦϯάஶଠాྑయɺҏݪྗ໵༁  IUUQBN[OUPG%21WˡΞϑΟ஫ҙ

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ηογϣϯ͸  ϦΫΤετ͋Ε͹  اը͠·͢

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BSJB99999ଐੑ w ࠓճͷςʔϚʹͱͯ΋ؔΘͬͯ͘Δଐੑ w SPMFଐੑ΋ؔΘͬͯ͸͍·͕͢ w ͦΕͧΕͷཁૉʹରͯ͠ɺεςʔτ΍ϓϩύςΟΛ ෇͚͍ͯ͘ଐੑ w +BWB4DSJQUͳͲͰૢ࡞ɾมߋ͢Δର৅ͱͯ͠ར༻ w $44΋૊Έ߹ΘͤΔͱͳ͓ྑ͔͠ͱ

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ྫ͑͹ʝʝ

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දࣔඇදࣔͷ੾Γସ͑ w bIPHF` UPHHMF w DMBTTlJTWJTJCMFz w DMBTTlJTIJEEFOz ͳͲͳͲɺ༷ʑͳϧʔϧͰ΍ͬͯ·ͤΜ͔ʁ

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BSJBIJEEFOଐੑ w ࢓༷ͱͯ͠ଘࡏ͍ͯ͠·͢ w BSJBIJEEFOlUSVFzBSJBIJEEFOlGBMTFz /* CSS */  [aria-hidden=“true”]{display: none} //JavaScript(jQuery)  $(‘#hoge’).attr(‘aria-hidden’,true);

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σϞ

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    toggle   

  show/hidden 

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BSJBDPOUSPMTଐੑ w τϦΨʔͷૢ࡞ର৅ͷཁૉͷJEΛࢦఆ w +BWB4DSJQUͰૢ࡞ର৅ͷϙΠϯλΛऔಘͰ͖Δ

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͔͜͜Β͍Ζ͍Ζ  ঺հ͠·͕͢ʝʝ

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ΞΫηγϏϦςΟʹ  ৄ͍͠ਓʹΑ͘ݴΘΕΔ  ͓ݴ༿͕͋Γ·͢

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#PPUTUSBQͱ͔ͷํ͕  ΑͬΆͲͪΌΜͱͯ͠Δ

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Ͳ͏͍͏ҙຯʁ w ޽ͷʢྫ͑͹ʣK2VFSZϥΠϒϥϦͱ͔ରԠ͕·ͪ· ͪͰཁ݅Λຬ͍ͨͯ͠Δ΋ͷ͔݁ߏ͋΍͍͠΋ͷ΋ ଟ͍ w ϓϩμΫτͱͯ͠੒ཱ͍ͯ͠Δ#PPUTUSBQ΍ 'PVOEBUJPOͳͲ͸΍͸ΓҰఆͷج४Λຬ͍ͨͯ͠Δ w Ͱ͸ΦϨΦϨղऍΑΓ͸Ұ୴ͦ͏͍ͬͨ΋ͷΛࢀর ͯ͠Έ·͠ΐ͏

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ࠓճ͸1BZ1BMۘ੡ͷ#PPUTUSBQ"DDFTTJCJMJUZ1MVHJOΛ ྫʹ͢͢ΊͯΈ·͢ IUUQQBZQBMHJUIVCJPCPPUTUSBQBDDFTTJCJMJUZ QMVHJOEFNPIUNM

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1VMMEPXO

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Dropdown

Action

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BSJBFYQBOEFE w ͦͷཁૉࣗମɺ·ͨ͸ૢ࡞͍ͯ͠Δཁૉ͕ʮల։ ऩೲ͞Ε͍ͯΔ͔ʯΛUSVFGBMTFͰࣔ͢

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BSJBMBCFMMFECZ w ֘౰ͷཁૉͷϥϕϧͱͳ͍ͬͯΔཁૉͷJEΛࢦఆ Dropdown

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/* CSS */    [aria-expanded="false"] + ul{  display: none;  }  //JavaScript(jQuery)  $('#hoge').attr(  'aria-expanded',  $(‘#hoge’).attr('aria-expanded') !== 'true'  ); 

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·ͩ·͍ͩͬͺ͍  ͋Γ·͢Α

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Θ͔Γ΍͍͢ʮ8"*"3*"ʯ࢓༷ղઆॻ  େ౻װ  IUUQBN[OUPH%TI8ˡΞϑΟ஫ҙ

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ίʔσΟϯά8FCΞΫηγϏϦςΟ  ϔΠυϯɾϐΧϦϯάஶଠాྑయɺҏݪྗ໵༁  IUUQBN[OUPG%21WˡΞϑΟ஫ҙ

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·ͱΊ w 8"*"3*"ͷSPMFBSJB99999͸)5.-ͷҙຯΛิ ॿڧԽΛ͢Δ࢓༷ w DMBTT΍EBUB99999ͷಠࣗϧʔϧΑΓ͸ڞ௨Խ͠ ΍͍͢ w ଐੑηϨΫλͷ࢖͍ํ͕؊ʢK2VFSZRVFSZ4FMFDUPS ͳͲʣ