The document Variable

The `document` Variable

The document global variable has type Document. It has the following useful attribute:

document.documentElement - the root of the document hierarchy: the <html> tag and its contents.

The document variable is usually a HTMLDocument. Then it has the following additional attribute:

Any Document object has the following useful methods:

getElementById(id) - returns the HTML element whose id attribute is id. The entire document hierarchy is searched.
getElementsByTagName(tagName) - returns an array of HTML elements whose tag name is tagName. The entire document hierarchy is searched.
createElement(tagName) - creates an HTML element with tag tagName.
createTextNode(text) - creates a Text element with content text.