The class name can be used by CSS and JavaScript to perform certain tasks for elements with the specified class name. The class attribute can be used on any HTML element.

The class attribute specifies one or more classnames for an element.The class attribute is mostly used to point to a class in a style sheet. Add the following JavaScript in the head section.

Felix's code works well by using spaces as the delimiter.Fails to account for nested instances of a class name. Using .className property: This property is used to add a class name to the selected element.

your coworkers to find and share information. The document.getElementById() method is used to return the element in the document with the “id” attribute and the “className” attribute can be used to change/append the class of the element.If you like GeeksforGeeks and would like to contribute, you can also write an article using Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. 1. class attribute identifies an element in HTML document. The class attribute can be used on any HTML element. as examples - the real strings are all different.

"Using plain JavaScript (not jQuery)" 2.
The class attribute is mostly used to point to a class in a style sheet.

As this does not work together with the switch statement, you could achieve the same effect with this code:Since he wants to use switch(), I'm surprised no one has put this forth yet:Here is a little snippet If you’re trying to check wether element contains a class, without using jQuery.This accounts for the fact that element might contain multiple class names separated by space.You can also assign this function to element prototype.This is a little old, but maybe someone will find my solution helpfull:I know there a lot of answers but most of these are for additional functions and additional classes.

Class in html: The class is an attribute which specifies one or more class names for an HTML element. All code inside the class construct is automatically in strict mode. The constructor method is called each time the class object is initialized.Create an object called "mycar" based on the Car class:The constructor method is special, it is where you initialize properties, it

as a parameter:A class created with a class inheritance inherits all the methods from W3Schools is optimized for learning, testing, and training.



A class is a type of function, but instead of using the keyword function to initiate it, we use the keyword class , and the properties are assigned inside a constructor() method. These are for the internal interface. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

Script to Change the Class Attribute.

You would need to loop through all the elements with that class name and change them to the new name: CSS:.winner { background-color: white; } .winnerBlue { background-color: blue; } W3Schools is optimized for learning, testing, and training. Description HTML class attribute . Stack Overflow for Teams is a private, secure spot for you and

The class name can be used by CSS and JavaScript to perform certain tasks for elements with the specified class name. A JavaScript class is a type of function. Using plain JavaScript (not jQuery), Is there any way to check if an element ...there's no longer an exact match, so I get the default output of nothing (This works on all current browsers and there are polyfills to support older browsers too. A class definition sets enumerable flag to false for all methods in the "prototype".

The other answers are much more robust but this certainly has it's use cases.Alternatively if you are compiling with babel you can simply use: to HTML elements with a specified class.If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

These methods operate exactly with what’s written in HTML.

you could just use /^class_name_you_are_searching_for$/.test(myElement.className)I wrote that too fast. On top of your current class in your .css file, you could add another class in there, and then just switch the HTML elements to belong to that new class. In JavaScript, there are two types of object fields (properties and methods): Public: accessible from anywhere. @Felix Kling: that did it, thanks so much! another class:Create a class named "Model" which will inherit the methods from the "Car" Classes are declared with the class keyword.
If the specified attribute already exists, only the value is set/changed. and this just adds to my stack. Stack Overflow works best with JavaScript enabled a class 1.

By using our site, you The class is an attribute which specifies one or more class names for an HTML element. Just to not overcomplicate my regular expression it would be /\s*class_name_you_are_searching_for\s*/.test(myElement.className)@pqsk - i write my own libraries for future use. Attributes may consist of name/value pairs, and a few of the most common attributes are class and style. However, it can also be used by a JavaScript (via the HTML DOM) to make changes to HTML elements with a specified class. Felix's trick of adding spaces to flank the className and the string you're searching for is the right approach to determining whether the elements has the class or not.To have different behaviour according to the class, you may use function references, or functions, within a map:I would Poly fill the classList functionality and use the new syntax.