JavaScript Learning Tour (2) _ Basic knowledge

Chapter Three DOM

The DOM is the initials of the Document Object model.

Node

ELEMENT node: Is the atom of the DOM. For example: text paragraph element name p unordered list element name ul ... "NodeType property value is 1"

Text node: A text node is always contained inside an element node. "NodeType Property value is 3"

Attribute node: The attribute node is always placed in the start tag. For example: title= "A gentle Reminder" "NodeType property value is 2"



The getElementById () method returns an object



document.getElementById (ID) IDs must be placed in single or double quotes such as: document.getElementById ("purchases")



The getElementsByTagName () method returns an array of objects



getElementsByTagName (tag) tag must be (x) the name of the HTML tag and placed in double quotes such as: document.getElementsByTagName ("Li")







GetAttribute () method query properties are called by a specific object



Object.getattribute (attribute)



SetAttribute () method to set properties



Object.setattribute (Attribute,value)