Search results
15 sie 2024 · Classes allow CSS and JavaScript to select and access specific elements via the class selectors or functions like the document.getElementsByClassName().
25 lip 2024 · Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are unique to classes. For more examples and explanations, see the Using classes guide.
One way to play around with classes without frameworks/libraries would be using the property Element.className, which "gets and sets the value of the class attribute of the specified element." (from the MDN documentation).
In general, you should consider using classes when you want to create objects that store their own internal data and expose a lot of behavior. Take built-in JavaScript classes as examples: The Map and Set classes store a collection of elements and allow you to access them by key using get(), set(), has(), etc.
The HTML class attribute specifies one or more class names for an element; Classes are used by CSS and JavaScript to select and access specific elements; The class attribute can be used on any HTML element; The class name is case sensitive; Different HTML elements can point to the same class name
29 wrz 2022 · JavaScript can modify both classes and style properties. We should always prefer CSS classes to style. The latter should only be used if classes “can’t handle it”. For example, style is acceptable if we calculate coordinates of an element dynamically and want to set them from JavaScript, like this:
The Set object lets you store unique values of any type, whether primitive values or object references. If an iterable object is passed, all of its elements will be added to the new Set. null is treated as undefined. Set objects are collections of values, you can iterate its elements in insertion order.
