The Document Object Model (DOM)

What is DOM manipulation?

DOM manipulation is the process of changing the structure, style, or content of a web page using the DOM API.

What does DOM stand for?

Document Object Model

What is the difference between the HTML and the DOM?

HTML is a markup language used to describe the structure of a web page, while the DOM is a programming interface used to access and manipulate the structure of a web page.

What is the DOM?

The DOM is a programming interface for web documents. It represents the page so that programs can change the document structure, style, and content.

Why is the DOM like a tree?

The DOM is like a family tree. Just like a family tree it shows how different family members are related to each other, the DOM shows how different parts of a web page are related to each other. In a family tree, grandparents are at the top and their children and grandchildren are below them, forming a branching structure. Similarly, in the DOM, the main HTML tag is at the top, and the nested HTML elements are below it, forming a branching structure that represents the structure of the web page.

Is a DOM node the same as an HTML element?

No, a DOM node is not the same as an HTML element. A DOM node is an object in the DOM tree that can represent an HTML element, attribute, or text content, while an HTML element is a tag in the HTML source code that represents an element in the DOM tree.

What is the appendChild() method used for?

The appendChild() method is used to add a new child node to an element in the DOM tree.

What is the purpose of the nextSibling property in JavaScript? Options: A) To retrieve the next element after an element. B) To retrieve the previous element before an element. C) To retrieve the parent element of an element.

Option A The nextSibling property in JavaScript is used to retrieve the next element after an element.

What is the purpose of the parentNode property in JavaScript? Options: A) To retrieve the parent element of an element. B) To retrieve the child elements of an element. C) To retrieve or change the HTML content of an element.

Option A The parentNode property in JavaScript is used to retrieve the parent element of an element.

What is the purpose of the removeAttribute method in JavaScript? Options: A) To remove an attribute from an element. B) To add a new attribute to an element. C) To retrieve the value of a specified attribute on an element.

Option A The removeAttribute method in JavaScript is used to remove an attribute from an element.

What is the purpose of the style property in JavaScript? Options: A) To retrieve or change the CSS style of an element. B) To retrieve or change the HTML content of an element. C) To retrieve the text content of an HTML element.

Option A The style property in JavaScript is used to retrieve or change the CSS style of an element.

What is the purpose of the appendChild method in JavaScript? Options: A) To remove an element from the DOM. B) To add a new element to the end of an existing element's child nodes. C) To add a new element to the beginning of an existing element's child nodes.

Option B The appendChild method in JavaScript is used to add a new element to the end of an existing element's child nodes.

What is the purpose of the createElement method in JavaScript? Options: A) To retrieve an element from the DOM. B) To create a new element in the DOM. C) To remove an element from the DOM.

Option B The createElement method in JavaScript is used to create a new element in the DOM.

What is the purpose of the getElementById method in the DOM? Options: A) To create a new element in the DOM. B) To retrieve an element from the DOM by its ID attribute. C) To remove an element from the DOM.

Option B The getElementById method in the DOM is used to retrieve an element from the DOM by its ID attribute.

What is the purpose of the setAttribute method in JavaScript? Options: A) To remove an attribute from an element. B) To add a new attribute to an element. C) To retrieve the value of a specified attribute on an element.

Option B The setAttribute method in JavaScript is used to add a new attribute to an element.

What is a DOM node in JavaScript? Options: A) A method used to manipulate strings in JavaScript. B) A programming interface for web browsers that allows JavaScript to access and manipulate the content and structure of a web page. C) An element in a web page that can be accessed and manipulated with JavaScript.

Option C A DOM node in JavaScript is an element in a web page that can be accessed and manipulated with JavaScript.

What is a child node in the DOM? Options: A) A method used to manipulate strings in JavaScript. B) An element in the DOM that has one or more parent nodes. C) An element in a web page that can be accessed and manipulated with JavaScript and is nested inside another element.

Option C In the DOM, a child node is an element in a web page that can be accessed and manipulated with JavaScript and is nested inside another element.

What is a parent node in the DOM? Options: A) An element in a web page that can be accessed and manipulated with JavaScript. B) A method used to manipulate strings in JavaScript. C) An element in the DOM that has one or more child nodes.

Option C In the DOM, a parent node is an element that has one or more child nodes.

What is the Document Object Model (DOM) in JavaScript? Options: A) A programming language used to create dynamic, interactive web pages. B) A method used to manipulate strings in JavaScript. C) A programming interface for web browsers that allows JavaScript to access and manipulate the content and structure of a web page.

Option C The Document Object Model (DOM) in JavaScript is a programming interface for web browsers that allows JavaScript to access and manipulate the content and structure of a web page.

What is the purpose of the getAttribute method in JavaScript? Options: A) To retrieve the CSS style of an element. B) To retrieve the HTML content of an element. C) To retrieve the value of a specified attribute on an element.

Option C The getAttribute method in JavaScript is used to retrieve the value of a specified attribute on an element.

What is the purpose of the innerHTML property in JavaScript? Options: A) To retrieve the text content of an HTML element. B) To change the text content of an HTML element. C) To retrieve or change the HTML content of an element.

Option C The innerHTML property in JavaScript is used to retrieve or change the HTML content of an element.

What is the purpose of the removeChild method in JavaScript? Options: A) To retrieve an element from the DOM. B) To create a new element in the DOM. C) To remove an element from the DOM.

Option C The removeChild method in JavaScript is used to remove an element from the DOM.

What is the difference between document.getElementById() and document.querySelector()?

document.getElementById() is a method used to select an element with a specific ID attribute, while document.querySelector() is a method used to select an element with a specific CSS selector.

What is the difference between getElementsByTagName() and getElementsByClassName() in the DOM?

getElementsByTagName() is a method used to select all elements in the DOM with a specific tag name, while getElementsByClassName() is a method used to select all elements in the DOM with a specific class name.

What is the difference between innerHTML and textContent?

innerHTML is a property that gets or sets the HTML content inside an element, including any HTML tags, while textContent is a property that gets or sets the text content inside an element, excluding any HTML tags.

How do you access an element in the DOM using JavaScript?

You can access an element in the DOM using JavaScript by using the document.getElementById() method or the document.querySelector() method.

How do you find an element in the DOM tree that doesn't have an ID?

You can find an element in the DOM tree that doesn't have an ID by using the document.querySelector() method.

How do you remove an element from the DOM using JavaScript?

You can remove an element from the DOM using JavaScript by using the element.parentNode.removeChild(element) method.

What is a parent node in the DOM?

A parent node is like a big container that holds other smaller containers. In an HTML web page, the biggest container is usually the <html> tag and the smaller containers are other HTML tags that are nested inside it. For example, the <head> tag and the <body> tag are both child nodes of the <html> tag, which is their parent node.

What is a text node in the DOM?

A text node is a type of node in the DOM tree that represents text content within an element.

What is a CSS selector?

A CSS selector is a pattern used to select one or more elements in the DOM based on their tag name, ID, class, attributes, or position.

What is a DOM tree?

A DOM tree is a hierarchical structure that represents the elements, attributes, and text content of a web page as a collection of nodes.

What is a child node in the DOM?

A child node is like a smaller container that is nested inside a bigger container. In an HTML web page, the smaller containers are usually HTML tags like <p>, <h1>, <img>, and so on. Each of these tags contains content like text, images, and links, and they are nested inside larger tags like the body tag or other container tags.

What is a node in the DOM?

A node is an object in the DOM tree that represents an element, attribute, or text content.

What is the difference between a parent node and a child node in the DOM tree?

A parent node is an element that contains other elements or nodes, while a child node is an element or node that is contained within a parent element.

What is the children property used for in the DOM?

The children property is used to get a collection of child elements of an element in the DOM tree.

What is the cloneNode() method used for in the DOM?

The cloneNode() method is used to create a copy of an element in the DOM tree, including its children and attributes.

What is the createElement() method used for?

The createElement() method is used to create a new HTML element in the DOM tree.

What is the createTextNode() method used for in the DOM?

The createTextNode() method is used to create a new text node in the DOM tree.

What is returned from the document.querySelectorAll() method?

The document.querySelectorAll() method returns a NodeList of all elements in the DOM tree that match a specific CSS selector. A NodeList is an 'array-like' index-based collection of nodes in the DOM tree that we can loop through like it was an array"

What is the firstChild property used for in the DOM?

The firstChild property is used to get or set the first child node of an element in the DOM.

What is the getAttributeNode() method used for in the DOM?

The getAttributeNode() method is used to get the attribute node of an attribute on an element in the DOM tree.

What is the innerText property used for in the DOM?

The innerText property is used to get or set the text content of an element in the DOM, excluding any HTML tags or elements.

How can you identify a parent and child node in the DOM?

You can identify a parent node in the DOM by looking for the larger container that holds other smaller containers. In an HTML web page, the top parent node is usually the HTML tag, and the child nodes are the tags that are nested inside it. You can identify a child node by looking for the smaller container that is nested inside a larger container. By understanding how the HTML tags are nested inside each other, you can identify which tags are parent and child nodes.

What is the nextSibling property used for in the DOM?

The nextSibling property is used to get or set the next sibling node of an element in the DOM.

What is the nodeName property used for in the DOM?

The nodeName property is used to get the name of the current node in the DOM, such as "DIV", "SPAN", or "TEXT".

What is the nodeType property used for in the DOM?

The nodeType property is used to get the type of the current node in the DOM, such as 1 (element node), 3 (text node), or 8 (comment node).

What is the previousSibling property used for in the DOM?

The previousSibling property is used to get or set the previous sibling node of an element in the DOM.

What is the removeAttributeNode() method used for in the DOM?

The removeAttributeNode() method is used to remove an attribute node from an element in the DOM tree.

What is the removeChild() method used for in the DOM?

The removeChild() method is used to remove a child node from an element in the DOM tree.

What is the setAttribute() method used for?

The setAttribute() method is used to add or change an attribute on an element in the DOM tree.

What is the setAttributeNode() method used for in the DOM?

The setAttributeNode() method is used to add or change an attribute node on an element in the DOM tree.

What is the style property used for in the DOM?

The style property is used to get or set the CSS style properties of an element in the DOM.