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JavaScript is a programming language that runs on web pages. It can bring rich dynamic effects and interactivity to websites. Today, we will discuss what JavaScript can do natively.
JavaScript can operate HTML and CSS through the DOM (Document Object Model). You can change the element's style, content, attributes, etc. Through JavaScript, we can make certain elements change during user interaction, such as changing color, size, position, transparency, etc., adding or removing elements, and modifying the class of elements.
JavaScript can also help us process form data. We can use form events in JavaScript to verify the validity of user input and ensure that the user's input meets specific requirements. At the same time, JavaScript can also override native HTML form validation. Additionally, you can use JavaScript's Ajax technology to submit and process form data asynchronously without having to reload the page.
Through JavaScript, we can also use cookies to store user data. A cookie is a small text file that is stored on the user's computer. They are widely used to remember a user's preferences, such as their username, password, language settings, and more. JavaScript can easily read and create cookies and send them to the server.
On top of HTML and CSS, JavaScript can create richer animation effects. You can use functions such as setTimeout()
, setInterval()
and requestAnimationFrame()
in JavaScript to control the speed and time of animation, while using ## of CSS3 #transform,
transition and other attributes to create various types of animation effects.
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