Baseline Widely available
before()
㯠CharacterData
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ãªãã¸ã§ã¯ãã¾ãã¯æååãããã® CharacterData
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nodes
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HierarchyRequestError
DOMException
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CharacterData
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, DocumentType
, Element
, CharacterData
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ãã¼ããå®éã«ã¯ Text
ãã¼ãã§ããããã®è¦ªã Document
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ãã¼ãã®è¦ªã Document
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ã§ããããã®ä¸ã« 1 ã¤ä»¥ä¸ã® Element
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const h1TextNode = document.querySelector("h1").firstChild;
h1TextNode.before("h1# ");
h1TextNode.parentElement.childNodes;
// NodeList [#text "h1# ", #text "CharacterData.before()"]
h1TextNode.data;
// "CharacterData.before()"
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