Baseline Widely available
HTMLFormElement.length
ã¯èªã¿åãå°ç¨ã®ããããã£ã§ã <form>
è¦ç´ ã«å«ã¾ããã³ã³ããã¼ã«ã®æ°ãè¿ãã¾ãã
ãã©ã¼ã ã®ã³ã³ããã¼ã«ã®ä¸è¦§ã«ã¯ elements
ããããã£ã使ç¨ãã¦ã¢ã¯ã»ã¹ãããã¨ãã§ãã¾ãã
ãã㯠<form>
è¦ç´ ã®åå«ã§ããè¦ç´ ãããã³ form
ããããã£ã使ç¨ãã¦ãã©ã¼ã ã®ã¡ã³ãã¼ã«ãªã£ãè¦ç´ ã®ä¸¡æ¹ãå«ã¾ãã¾ãã
ãã®ããããã£ã§æ±ãããè¦ç´ ã¯ã <button>
, <fieldset>
, <input>
ï¼ãã ãã "image" åã®ãã®ã¯ãæ´å²çãªçç±ã«ãã£ã¦é¤å¤ããã¾ãï¼ã<object>
, <output>
, <select>
, <textarea>
ã§ãã
æ°å¤ã§ãã
ä¾if (document.getElementById("form1").length > 1) {
// è¤æ°ã®ãã©ã¼ã ã³ã³ããã¼ã«ãããå ´å
}
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