Baseline Widely available
insertData()
㯠CharacterData
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characterData.insertData(offset, data)
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offset
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data
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DOMException
offset ãè² ã®å¤ã§ããããå ¥ã£ã¦ãããã¼ã¿ã®é·ãããã大ããå ´åã«çºçãã¾ãã
<span>çµæ: </span>A string.
const span = document.querySelector("span");
const textnode = span.nextSibling;
textnode.insertData(2, "long ");
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