Jquery Interview Question and Answers
Jquery Interview Question and Answers: jQuery is a fast, small, and feature-rich JavaScript library that simplifies HTML document traversing, event handling, and animating. It is a free and open-source software that is widely used by web developers to create dynamic and interactive web pages.
Jquery Interview Question and Answers: jQuery provides a set of powerful tools and functions that make it easier to manipulate the Document Object Model (DOM), handle events, create animations, and make AJAX requests. With jQuery, web developers can write less code and achieve more functionality and interactivity with their web pages. It is a popular choice for building responsive and mobile-friendly websites, and it has a large and active community that contributes to its development and support, Here we are Providing Important Jquery Interview Question and Answers
Jquery Interview Question and Answers;
Q1: What is jQuery and what are its advantages?
A: jQuery is a fast, small, and feature-rich JavaScript library that simplifies HTML document traversing, event handling, and animating. Its advantages are that it provides a simple, cross-browser way to access and manipulate the DOM, it has a large number of built-in functions that can be used to manipulate and animate web pages, it is easy to learn and use, and it has a large and active community that provides support and plugins.
Q2: How do you include jQuery in a web page?
A: To include jQuery in a web page, you can download the jQuery library from the official jQuery website, or you can use a CDN to include the library from a remote server. Once you have the jQuery library, you can include it in your web page by adding a script tag to the head section of your HTML document and specifying the path to the jQuery library file.
Q3: How do you select an element in jQuery?
A: To select an element in jQuery, you can use the jQuery function, which is a shorthand for the jQuery constructor. You can use a CSS selector to select the element, and then you can apply jQuery methods to manipulate the selected element. For example, to select all the paragraphs in a web page, you can use the following code: $(‘p’).
Q4: What is the difference between document.ready() and window.load()?
A: The document.ready() function is called as soon as the DOM is ready, which means that it is called before all the images and other resources have finished loading. The window.load() function is called when all the resources, including images, have finished loading. This means that the document.ready() function is faster than the window.load() function, but it may not be suitable for tasks that require all the resources to be loaded.
Q5: What is chaining in jQuery?
A: Chaining is a technique in jQuery where multiple methods can be chained together to manipulate a single element or a group of elements. Chaining is achieved by returning the current jQuery object from one method, which can then be passed to another method. Chaining can make code more readable and efficient by reducing the number of lines of code needed to accomplish a task. For example, the following code uses chaining to set the background color and font size of all the paragraphs in a web page: $(‘p’).css(‘background-color’, ‘yellow’).css(‘font-size’, ’20px’).
Q6: What is the difference between prop() and attr() in jQuery?
A: The prop() method is used to get or set the value of a property of an element, such as a checkbox or a radio button. The attr() method is used to get or set the value of an attribute of an element, such as the href attribute of a link. The main difference between prop() and attr() is that prop() returns the current value of a property, while attr() returns the current value of an attribute. Additionally, some properties, such as checked and selected, have a different behavior than attributes, and should be accessed using the prop() method.
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