Dom structure
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Dom structure Dom structure Presentation Transcript

  • Dom Structure Arun .R. Menon +919846629020
  • Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
  • DOM-DOCCUMENT OBJECT MODEL  A W3C (World Wide Web Consortium) standard. Defines a standard for accessing documents. Platform that allows programs and scripts to dynamically access and update the content, structure, and style of a document. The W3C DOM standard :3 different parts: Core DOM - standard model for all document types XML DOM - standard model for XML documents HTML DOM - standard model for HTML documents
  • DOM views HTML documents as a tree structure. All browsers are following DOM and because of this the JavaScript code will work on all the browsers in the same way.
  • DOM PROGRAMMING INTERFACE The HTML DOM can be accessed with JavaScript All HTML elements are defined as objects. Programming interface: properties and methods of object. property : value that you can get or set. changing the content of an HTML element method : an action you can do add or deleting an HTML element.
  • EXAMPLE <html> <body> <p >WELCOME TO BAABTRA</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = "Hello World!"; </script> </body> </html> getElementById: method access element using its id innerHTML: property to get the content of an element
  • METHODS USED TO FIND AN ELEMENT • document.getElementById() • document.getElementByTagName() • document.getElementByClassName()
  • METHODS USED FOR CHANGING AN ELEMENT • Element.innerHTML= • Element.attribute= • Element.setAttribute(attribute.value) •
  • METHODS FORADDING AND DELETING ELEMENTS • document.createElement() • document.removeChild() • document.removeChild() • document.appendChild() • document.replaceChild() • document.write(text)
  • METHOD FOR ADDING EVENT HANDLERS document.getElementById(id).onclick=function(){code}
  • Code Output Program to validate customer registration form. If any field left blank corresponding label must be turned red and form should not get submitted.
  • THANK YOU...
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