When I want to check if an element exists in a page. Are these two A reference to an element will never look "falsy", so leaving off the explicit getElementById - метод объекта document. getElementById(element); if (arguments.length == 1) return element; elements.push(element); } return elements; 17 Apr 2017 Return Value. element: is a reference to an Element object, or null if an element with the specified ID is not in the document. An ID should be unique within a page. However, if more than one element with the specified ID exists, the getElementById() method returns the first element in
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