DOM(Document Object Model) is a programming API for HTML and XML doc. The Document object has various properties that refer to other objects which allow access to and modification of document content.
These are some typical DOM properties: The command that can be used in XML DOM is as follows: Set objParser = CreateObject( “Microsoft.XMLDOM” ) The program that is used to represent the structure of the DOM: <html> <head> <title>DOM Tutorial</title> </head> <body> <h1>DOM Lesson one</h1> <p>Hello world! </p> </body> </html> <title>DOM </title>, element node <title> The code that shows the relationship is as follows: <html> <head> <title>DOM </title> </head> <body> <h1>DOM </h1> <p>Hello world!</p> </body> </html> The DOM property that exists in HTML: x.innerHTML – this stores the text value of x used to display it on the x axis. x.nodeName – this stores the node name of x on the x axis of the node. x.nodeValue – this provides the value of x for the node that is being used. HTML DOM provides methods to simplify the tasks and the methods are as follows: x.getElementById(id) – this allow the getting of the element that is associated with a specified id. x.getElementsByTagName(name) – this gets all the elements using the tag name that is associated with it. x.appendChild(node) – this inserts a child node to x and append the child node at the end of the tree. x.removeChild(node) – this removes a child node from x and remove from the tree area also. The example of it is shown below by using the <p> element properties as: <html> <body> <p id=”intro”>Hello World!</p> <script type=”text/javascript”> txt=document.getElementById(“intro”).innerHTML; document.write(“<p>Hello world: ” + txt + “</p>”); </script> </body> </html> HTML DOM uses getElementById method in the JavaScript form to access the element’s id and make changes accordingly. There are properties like childNodes and nodeValue used to get the content using an element. <html> <body> <p id=”intro”>Hello World!</p> <script type=”text/javascript”> txt=document.getElementById(“intro”).childNodes[0].nodeValue; document.write(“<p>The text from the intro paragraph: ” + txt + “</p>”); </script> </body> </html> The use of innerHTML property being used by applying the learning method that is useful and easily understandable by the tree structure of DOM. Node is used in HTML DOM as an object that points to the other element in the tree and gets generated by the root node. Nodes in an object form have some methods and properties that allow the accessing of the JavaScript to be used for modification. The node properties include the following things: The example that allows the change is as follows: <html> <body> <script type=”text/javascript”> document.body.bgColor=”green”; </script> </body> </html> The example is shown below that is used to change the HTML element values: New Update HTML DOM Interview Questions and Answers The HTML DOM (Document Object Model) is a programming interface provided by browsers that allows developers to interact with HTML documents dynamically. It represents the structure of an HTML page as a tree-like structure of objects, where each HTML element is represented as an object with properties and methods. You can access an HTML element using JavaScript by using various methods like getElementById, getElementsByClassName, getElementsByTagName, querySelector, and querySelectorAll. querySelector returns the first element that matches the specified CSS selector, while querySelectorAll returns a NodeList containing all elements that match the specified CSS selector. You can modify the content of an HTML element using JavaScript by accessing the element and then using properties like innerHTML, innerText, or textContent to change the content. You can add an event listener to an HTML element using the addEventListener method. For example: const button = document.getElementById(‘myButton’); button.addEventListener(‘click’, function() { // Your event handling code here }); Event propagation, also known as event bubbling and event capturing, refers to the order in which events are triggered and processed in the DOM hierarchy. During event bubbling, the event is first triggered on the target element and then propagates up the DOM tree to the root element. During event capturing, the event is triggered at the root element and then propagates down to the target element. You can stop event propagation in the DOM using the stopPropagation() method of the Event object. Calling this method within an event listener prevents the event from propagating further up or down the DOM tree. In event handling, the this keyword refers to the element that triggered the event. It provides a way to access the current HTML element within the event handler function. window.onload fires when the entire page, including its resources like images and stylesheets, has loaded, while document.onload fires when the DOM content (HTML structure) has finished loading. You can create and append an HTML element to the DOM using the createElement method to create the element, and then use the appendChild method to append it to another existing element. You can change the CSS style of an HTML element using JavaScript by accessing the element’s style property and modifying its individual CSS properties. For example: const element = document.getElementById(‘myElement’); element.style.color = ‘red’; Event delegation is a technique where you attach a single event listener to a parent element instead of attaching individual listeners to multiple child elements. The event is then handled based on the target element that triggered it, using the event.target property. You can remove an HTML element from the DOM using the remove() method or by accessing its parent element and using the removeChild() method. The data- attribute in HTML allows you to store custom data with an element. It is often used to store additional information related to the element, which can be accessed and manipulated using JavaScript. You can dynamically create and load a script element in the DOM using the createElement method to create the script element, setting its src attribute to the script URL, and then appending it to the head or body element using the appendChild method. This is often used to load external scripts asynchronously.What is the main function of DOM?
What are the HTML DOM Properties?
What are the levels involved in DOM?
What is the use or function of XML DOM?
What is the use or function of HTML DOM?
What is the use of DOM in W3C standards?
Write a program that shows the use of DOM?
What are the errors made while processing the DOM?
What is the purpose of HTML DOM Node Tree?
How does the relationship exist between the node, child and siblings in node-tree?
Explain through program the relationship that exists between the root and other nodes present in node-tree?
What is the programming interface used for DOM or HTML documents?
What are the methods involved in HTML DOM?
What are the properties of HTML DOM involved in the system?
Write a program that uses Methods and properties of HTML DOM?
What are the different properties of Nodes?
Write a program to change an HTML element?
Write a program to change the HTML element using events?
<html><body><input type="button" onclick="document.body.bgColor='green';"value="Change background color" /></body></html>What are the functionalities performed by onload() and onUpload()?
What do you know about HTML DOM?
How can you access an HTML element using JavaScript?
What is the difference between querySelector and querySelectorAll?
How can you modify the content of an HTML element using JavaScript?
How do you add an event listener to an HTML element?
What is event propagation in the DOM?
How do you stop event propagation in the DOM?
What is the this keyword in event handling?
What is the difference between window.onload and document.onload?
How do you create and append an HTML element to the DOM using JavaScript?
How can you change the CSS style of an HTML element using JavaScript?
What is event delegation in the DOM?
How can you remove an HTML element from the DOM using JavaScript?
What is the purpose of the data- attribute in HTML?
How can you dynamically create and load a script element in the DOM using JavaScript?
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