Element classList property Web APIs MDN MDN Web Docs
The Element classList is a read only property that returns a live DOMTokenList collection of the class attributes of the element This can then be used to manipulate the class list Using classList is a convenient alternative to accessing an element s list of classes as a space delimited string via element className Value
HTML DOM Element classList Property W3Schools, Description The classList property returns the CSS classnames of an element The classList property returns a DOMTokenList See Also Syntax element classList Return Value Note The classList property is read only but you can use the methods listed below to add toggle or remove CSS classes from the list classList Properties and Methods
How to Check If an Element Contains a Class in JavaScript W3docs
The hasClass method checks whether any of the selected elements have a specified class name The method returns true if any of the selected elements has the specified class name Elements may have multiple classes assigned to them javascript element string function
Javascript Is there a way to add remove several classes in one single , 1 1 asked Jun 20 2012 at 8 54 Enrique Moreno Tent 24 3k 34 105 189 Add a comment 16 Answers Sorted by 634 elem classList add first elem classList add second elem classList add third is equal elem classList add first second third Share Follow answered Jan 21 2013 at 3 37 iwege 6 530 1 15 5 25
JavaScript classList Manipulating CSS properties of an Element
JavaScript classList Manipulating CSS properties of an Element, 1 Get the CSS classes of an element Suppose that you have a div element with two classes main and red div id content class main red JavaScript classList div Code language HTML XML xml The following code displays the class list of the div element in the Console window
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DOMTokenList contains method Web APIs MDN
DOMTokenList contains method Web APIs MDN The contains method of the DOMTokenList interface returns a boolean value true if the underlying list contains the given token otherwise false
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The DOMTokenList interface represents a set of space separated tokens Such a set is returned by Element classList or HTMLLinkElement relList and many others A DOMTokenList is indexed beginning with 0 as with JavaScript Array objects DOMTokenList is always case sensitive DOMTokenList Web APIs MDN MDN Web Docs. In this method you pass the className to the contains method of the classList property of the element If the element contains the className the method returns true Otherwise it returns false For example suppose you have the following div element with two classes secondary and info With each click classList toggle will add the CSS class if it does not exist in the classList array and return true If the CSS class exists the method will remove the class and return false label index js const anotherClass myText classList toggle newSize console log anotherClass true class was added
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