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JavaScript HTML DOM Document

Posted: Fri Oct 27, 2023 9:07 am
by Guest
JavaScript HTML DOM Document


The HTML DOM document object is the owner of all other objects in your web page.

The HTML DOM Document Object
The document object represents your web page.
If you want to access any element in an HTML page, you always start with accessing the
document object.
Below are some examples of how you can use the document object to access and
manipulate HTML.

Finding HTML Elements


Method
Description


document.getElementById(id)
Find an element by element id


document.getElementsByTagName(name)
Find elements by tag name


document.getElementsByClassName(name)
Find elements by class name



Changing HTML Elements


Property
Description


element.innerHTML =  new html content
Change the inner HTML of an element


element.attribute = new value
Change the attribute value of an HTML element


element.style.property = new style
Change the style of an HTML element


Method
Description


element.setAttribute(attribute, value)
Change the attribute value of an HTML element



Adding and Deleting Elements


Method
Description


document.createElement(element)
Create an HTML element


document.removeChild(element)
Remove an HTML element


document.appendChild(element)
Add an HTML element


document.replaceChild(new, old)
Replace an HTML element


document.write(text)
Write into the HTML output stream









Adding Events Handlers


Method
Description


document.getElementById(id).onclick = function(){code}
Adding event handler code to an onclick event



Finding HTML Objects
The first HTML DOM Level 1 (1998), defined 11 HTML objects, object collections, and properties. These are still valid in HTML5.
Later, in HTML DOM Level 3, more objects, collections, and properties were added.


Property
Description
DOM


document.anchors
Returns all <a> elements that have a name attribute
1


document.applets
Deprecated
1


document.baseURI
Returns the absolute base URI of the document
3


document.body
Returns the <body> element
1


document.cookie
Returns the document's cookie
1


document.doctype
Returns the document's doctype
3


document.documentElement
Returns the <html> element
3


document.documentMode
Returns the mode used by the browser
3


document.documentURI
Returns the URI of the document
3


document.domain
Returns the domain name of the document server
1


document.domConfig
Obsolete.
3


document.embeds
Returns all <embed> elements
3


document.forms
Returns all <form> elements
1


document.head
Returns the <head> element
3


document.images
Returns all <img> elements
1


document.implementation
Returns the DOM implementation
3


document.inputEncoding
Returns the document's encoding (character set)
3


document.lastModified
Returns the date and time the document was updated
3


document.links
Returns all <area> and <a> elements that have a href attribute
1


document.readyState
Returns the (loading) status of the document
3


document.referrer
Returns the URI of the referrer (the linking document)
1


document.scripts
Returns all <script> elements
3


document.strictErrorChecking
Returns if error checking is enforced
3


document.title
Returns the <title> element
1


document.URL
Returns the complete URL of the document
1















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Reference: https://www.w3schools.com/js/js_htmldom_document.asp