JavaScript – DOM Collection item() Method
The collection item() method returns the element at a specified index in an HTMLCollection, which is an array-like list of HTML elements.
JavaScript – DOM Collection length Property
The Collection length property returns the number of elements in an HTMLCollection, which is an array-like list of HTML elements.
JavaScript – DOM Collection namedItem() Method
The collection namedItem() method returns a named element from an HTMLCollection, which is an array-like list of HTML elements.