JavaScript HTML DOM
With the HTML DOM, JavaScript can access and change all the elements of an HTML document. When a web page is loaded, the browser creates a Document Object Model of the page. The HTML DOM is a standard object model and programming interface for HTML. It defines:
- The HTML elements as objects
- The propertiesof all HTML elements
- The methodsto access all HTML elements
- The eventsfor all HTML elements
In other words: The HTML DOM is a standard for how to get, change, add, or delete HTML elements.
The HTML DOM model is constructed as a tree of Objects:
With the object model, JavaScript gets all the power it needs to create dynamic HTML:
- JavaScript can change all the HTML elements in the page
- JavaScript can change all the HTML attributes in the page
- JavaScript can change all the CSS styles in the page
- JavaScript can remove existing HTML elements and attributes
- JavaScript can add new HTML elements and attributes
- JavaScript can react to all existing HTML events in the page
- JavaScript can create new HTML events in the page
JavaScript - HTML DOM Methods
HTML DOM methods are actions you can perform (on HTML Elements).
HTML DOM properties are values (of HTML Elements) that you can set or change.
The DOM Programming Interface
The HTML DOM can be accessed with JavaScript (and with other programming languages).
In the DOM, all HTML elements are defined as objects.
The programming interface is the properties and methods of each object.
A property is a value that you can get or set (like changing the content of an HTML element).
A method is an action you can do (like add or deleting an HTML element).
