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Each HTML document that is loaded into the browser becomes the document object.
The Document object allows us to access all elements of an HTML page from within a script.
Tip: The Document object is part of the Window object and can be accessed through the Window.document property.
Document Object Collection| Collection | Description |
|---|---|
| All[] | Provides access to all HTML elements in a document. |
| Anchors[] | Returns a reference to all Anchor objects in the document. |
| Applets | Returns a reference to all Applet objects in the document. |
| Forms[] | Returns a reference to all Form objects in the document. |
| Images[] | Returns a reference to all the Image objects in the document. |
| Links[] | Returns a reference to all area and Link objects in the document. |
| Properties | Description |
|---|---|
| Body | Provides direct access to the <body> element. For a document that defines a frameset, this property refers to the outermost <frameset>. |
| Cookies | Sets or returns all cookies related to the current document. |
| Domain | Returns the domain name of the current document. |
| LastModified | Returns the date and time when the document was last modified. |
| Referrer | Returns the URL of the document loaded into the current document. |
| Title | Returns the title of the current document. |
| Url | Returns the URL of the current document. |
| Method | Description |
|---|---|
| Close () | Closes the output stream opened with the Document.open () method and displays the selected data. |
| getElementById () | Returns a reference to the first object that owns the specified ID. |
| Getelementsbyname () | Returns a collection of objects with the specified name. |
| getElementsByTagName () | Returns a collection of objects with the specified label name. |
| Open () | Open a stream to collect the output from any document.write () or Document.writeln () method. |
| Write () | Write an HTML expression or JavaScript code to the document. |
| Writeln () | is equivalent to the Write () method, unlike writing a newline character after each expression. |
The HTMLDocument interface extends the DOM Document interface, defining HTML-specific properties and methods.
Many properties and methods are Htmlcollection objects (which are actually read-only groups that can be indexed with arrays or names), where references to anchors, forms, links, and other scriptable elements are saved.
These collection properties are derived from the level 0 DOM. They have been replaced by document.getElementsByTagName (), but they are still often used because they are convenient.
The Write () method is worth noting that when a document is loaded and parsed, it allows a script to insert dynamically generated content into the document.
Note that in the Level 1 DOM, HTMLDocument defines a very useful method named getElementById (). In the Level 2 DOM, the method has been transferred to the Document interface, which is now inherited by HTMLDocument rather than defined by it.
HTML DOM Document
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