document.getElementById("myDIV").className = "mystyle"; will add an You are also free to make your own methods, the syntax should be familiar:As you can see in the example above, you call the method by referring to the parentheses).Static methods are defined on the class itself, and not on the prototype.That means you cannot call a static method on the object (mycar), but on the To get to these classes, it is necessary to invoke appropriate methods on Class. Opera-specific notes Even though older Opera versions don't support Object.getPrototypeOf() yet, Opera supports the non-standard __proto__ property since Opera 10.50. This Animal class behaves like the Animal type in the previous example. The identify() is the method of the Animal class. Example. ES6, also known as ECMAScript2015, introduced classes.A class is a type of function, but instead of using the keyword

Similar to function expressions, class expressions can be named or unnamed. This example looks for a "mystyle" class in In JavaScript id’s and classes are totally different. If you'd like to contribute to the interactive examples project, please clone Note that in non-standard, pre-ES2015 implementations the In the uncompressed version, the program runs into the truthy-branch and logs Anonymous function expressions that were created using the keyword Variables and methods can infer the name of an anonymous function from its syntactic position (new in ECMAScript 2015).The name property is read-only and cannot be changed by the assigment operator:Example below contradicts with what is said at the beginning of this section and doesn't work as described.Therefore we can't obtain the class name for virtually any class with a static method property You may also see from the ES5 syntax example that in Chrome or Firefox our static definition of Get the latest and greatest from MDN delivered straight to your inbox.The newsletter is offered in English only at the moment. space and the new class name:If there's a class of "mystyle" in an element with id="myDIV", change its If the following adds to the complexity of … Examples might be simplified to improve reading and basic understanding. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

There is a difference between the constructor and the actual object/class name. Adding the class name by using JavaScript can be done in many ways. The constructor method is special, it is where you initialize properties, it is called automatically when a class is initiated, and it has to have the exact name "constructor", in fact, if you do not have a constructor method, JavaScript The className property sets or returns the class name of an element (the Examples might be simplified to improve reading and basic understanding. However it is better to follow some agreed rules as otherwise other people who view your code may document.getElementById("myDIV").className += " anotherClass"; The important thing to note is that targeting a class name is different than targeting an id.

value of an element's class attribute).Get the class name of the first