Element: ariaPosInSet ããããã£
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ariaPosInSet 㯠Element ã¤ã³ã¿ã¼ãã§ã¤ã¹ã®ããããã£ã§ãç¾å¨ã®ãªã¹ãã¢ã¤ãã ã¾ãã¯ããªã¼ã¢ã¤ãã ã®éåã«ãããè¦ç´ ã®çªå·ã¾ãã¯ä½ç½®ãå®ç¾©ãã aria-posinset 屿§ã®å¤ãåæ ãã¾ãã
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ãã®ä¾ã§ã¯ãIDã article2 ã®è¦ç´ ã® aria-posinset 屿§ã¯ "2" ã«è¨å®ããã¦ãã¾ããariaPosInSet ã使ç¨ãã¦ãå¤ã "3" ã«æ´æ°ãã¾ãã
html
<article id="article1" aria-posinset="1">â¦</article>
<article id="article2" aria-posinset="2">â¦</article>
js
let el = document.getElementById("article2");
console.log(el.ariaPosInSet); // "2"
el.ariaPosInSet = "3";
console.log(el.ariaPosInSet); // "3"
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