When creating an element and assigning it an ID, you have to insert the element into the document tree with Node. Note that the id parameter is case-sensitive, so document.getElementById("Main") will return null instead of the element because "M" and "m" are different for the purposes of this method.Įlements not in the document are not searched by getElementById(). If there is no element with the given id, this function returns null. getElementById ( "test1" ) // throw error // Uncaught TypeError: parentDOM.getElementById is not a function getElementById ( "parent-id" ) const test1 = parentDOM. It returns the first element within the document that matches the given selector. It is a method to select the element in JavaScript using CSS selectors. Document hello word1 hello word2 hello word3 hello word4 const parentDOM = document. Another way Javascript get element by id is by using the querySelector method.
selectedStyleSheetSet Non-standard Deprecated.preferredStyleSheetSet Non-standard Deprecated.lastStyleSheetSet Non-standard Deprecated.
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