Suggested Certification for jQuery

W3Schools jQuery Certificate, JS Institute Certifications

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Interview Questions and Answers

jQuery methods often return the jQuery object itself, allowing you to chain multiple methods together for more concise code. Example: `$(#myElement).addClass(highlight).fadeIn(slow)`

Use the `event.preventDefault()` method within the forms submit handler. Example: `$(form).submit(function(event) { event.preventDefault(); // Prevent form submission });`

Use the `.html()` method. Example: `$(#myElement).html(

New paragraph

)`

Use the `.val()` method. Example: `$(#myInput).val()`

Use the `.val()` method with a value argument. Example: `$(#myInput).val(New value)`

Use the `.click()` method. Example: `$(#myButton).click(function() { alert(Button clicked!); });`

Use the `$.ajax()` method. Example: `$.ajax({ url: myUrl, success: function(result){ console.log(result); } });`

`.append()` inserts content *inside* the selected element, as the *last child*. `.appendTo()` inserts the selected element *inside* another element, as the *last child*. The order of the element and content is reversed.

`.attr()` retrieves the attribute value as it appears in the HTML source. `.prop()` retrieves the current property value, which may be different if the attribute has been changed dynamically by JavaScript or user interaction (e.g., the `checked` property of a checkbox). Use `.prop()` for boolean attributes like `checked`, `disabled`, and `selected`.

Use the `.hide()` method. Example: `$(#myElement).hide()`

Use the `.show()` method. Example: `$(#myElement).show()`

Use the `.addClass()` method. Example: `$(#myElement).addClass(highlight)`

Use the `.removeClass()` method. Example: `$(#myElement).removeClass(highlight)`

Use the `.text()` method. Example: `$(#myElement).text(New text)`

jQuery simplifies common JavaScript tasks, making your code more concise and readable. It also provides cross-browser compatibility, helping ensure your website works consistently across different browsers.

You can include jQuery in your HTML page by either downloading the jQuery library and referencing it locally or by using a Content Delivery Network (CDN) link in your ``

jQuery selectors allow you to select and manipulate HTML elements. They are based on CSS selectors, making it easy to target specific elements on your page.

Use the `#` prefix followed by the ID of the element. Example: `$(#myElement)`

Use the `.` prefix followed by the class name of the element. Example: `$(.myClass)`

jQuery is a fast, small, and feature-rich JavaScript library. It simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.