Check if element has class javascript there is pseudo-element ::after between an input element and a button element. querySelector('. Use the querySelector() method to check if an element has a child with a specific id. The easiest way to check if an element contains a class is by using the classList property and contains() method. The previousElementSibling returns the previous sibling of an element or null if the element is the first one in the list. During the development of the web page, a developer uses many classes and sometimes assign similar classes to different elements which requires same styles in CSS. $("a. getElementById() and the likes, which limit you to a specific attribute of the DOM element in question. addEventListener('click', e => { e. contains('baz')); // output: true console. You can just bind a click event to all the items in a selector directly rather than looping through a set and binding them individually. contains ( "active" ); It's really as simple as that! Jan 3, 2021 · For example: const elem = document. For example please look at the below picture- The foreach loop is unnecessary. forEach(function(element){ // Do whatever you want with the current element being enumerated console. toggle(function In the 10 years since you've asked this question, jQuery has added almost exactly the . TEXT_NODE and Node. classList is a read-only property that returns a live DOMTokenList collection of the class attributes of the element. contains('non-existent')); // output: false Since, Element. you might done any other mistake. Feb 26, 2024 · How to check if element has class in JavaScript, JavaScript has class modern JavaScript answer on Code to go May 31, 2014 · reading through this 6yrs later and thought I'd also take a hack at it, also in the TIMTOWTDI vein:D, hoping it isn't incorrect 'JS etiquette'. To check if an HTML element has a class, you can use the Element. So, to check if C is a class, you need to check these two things - this is what the isClass() code above does. Nov 23, 2017 · So if it has no elements and text, but has a comment tag inside, the length will be > 0. By default, each element has a full set of CSS styles assigned to it, most of them is implicitly using the browser defaults and some of them is explicitly redefined in CSS stylesheets. Since there's another form on the page, I only want the Enter key to advance the form when one of Jun 13, 2013 · Is there any way in jQuery to check if any parent, grand-parent, great-grand-parent has a class. Don’t worry; we can check if an element contains a specific class. For example, given some HTML: Feb 25, 2016 · Trying to find a way to display a console. length; // Count how many there are // Loop over the collection matchingElements. In this proces To check if an element has a specific class in JavaScript, you can use theclassList property and its methods. log('Nope, the class is missing. – The nextElementSibling returns the next sibling of an element or null if the element is the last one in the list. parent'); parent. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 🙌 Here's how you can modify your code to use classList. Every DOM element has a classList property that exposes the classes applied to that element. srcElement. contains('awesome-class')) { console. I am trying do do a simple game, if you click on the right box, you will get a message that you won. class == 'car') var elHasClass = function(element, classToTest) { var pattern = new RegExp("(^| )" + classToTest + "( |$)"); return pattern. querySelect I'm writing a single-field form and want the Enter key to advance the form to the next input field. contact"). # Check if an element contains a class on click in React. Fortunately, JavaScript provides a handy method called classList. @Eric An element which has no parent node can't be connected to the document , that's right. log('Rock on! The element has the class. Feb 14, 2017 · Does the current element have a parent element? Yes: Continue with step 2; No: There are no solutions to the task, return a null value; Does the parent element of the current element have the required class? Yes: Return the parent element; No: Set the current element to its parent element and repeat step 1; Code: Apr 3, 2025 · The Element. js: Set the onClick prop on the element. className. If you want to get elements by class, the function will return an array (a collection of all elements in the document with the specified class name), so you will check as following : Oct 2, 2019 · Check if there is an active class in the li element after clicking it; if there is none then add active class and if it already there then return or do nothing; for number 1 I read this topic check-if-an-element-contains-a-class-in-javascript but I quite confused of how to check in a child Jul 31, 2020 · CSS has attribute selectors that allow selection of elements with certain attributes. contains('className') . getElementById("game_" + variable). classList property of a DOM Element. Apr 9, 2013 · Is there an easy way to tell if an HTML element has a specific class? For example: var element = document. Nov 25, 2022 · How to test if an element contains class in JavaScript in HTML - In JavaScript, we can check for particular class whether it is contained by an HTML element or not, in the HTML document. It filters the selector it's called on -- and it's faster than using $('. parent('. com Feb 3, 2024 · Here’s how you can check if an element has a class: // Grab your element const element = document. Since the function returns a boolean you can use exclamation point to negate the result. match"); let count = matchingElements. getElementById('something'); if (element. classList . log(elem. '); Apr 2, 2024 · To check if the element has a particular class, we can use the contains method. js. contains('foo')); // output: false console. See the example here, this would be true as all children have the same class: Jul 30, 2015 · You could do something a little different to accomplish this. Depending on the result of the class check, we can perform different actions. It's great news that you don't need a library anymore to check if an element has a class or not because you can now simply do it with a call to May 13, 2014 · Building a website for a client but only for the mainpage I need to get a class on the main div for css purposes. child'). querySelectorAll(". This is the way, but I don`t think this will work. To get all siblings of an element, you can use a helper function that utilizes the nextElementSibling CSS Styles are key-value pairs, not just "tags". Then check the length on the array. – Felix Kling Nov 13, 2014 · I need an jQuery script that will see if any element has an specific class and do an action like change position. The classList. '); } else { console. e. ELEMENT_NODE. classList property to determine or check whether an element contains a class or Aug 1, 2018 · Ben Nadel demonstrates how to use the Element. To check if an element contains a class on click in React. If you need to check if an element contains a class on click, set the onClick prop on the element. Jan 5, 2016 · Hello this code gets tells me if current element has class. contains() method. – Nov 23, 2024 · Q: How do I check if an element has a class using plain JavaScript? A: You can use the classList. // The element does not have the 'myClass' class. For example: if you're looking for elements with "one" class, and your elements have "one two three" class, this function will not find them. Feb 13, 2020 · Use element. length == 0 Mar 7, 2012 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Apr 7, 2024 · If you need to add or remove a class on click, check out the following tutorial. I just tweaked a little bit that function since if the class specified in the parameter, is not present in the whole DOM, it fails when the recursion reaches the document object because is true that we control if the element has the parent node (in the last line, and when the document is the element the parent Nov 23, 2010 · The property you need is className, not class. May 10, 2013 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Feb 9, 2009 · Every class is internally just a function that creates instances of this class, plus a prototype property that's assigned to [[Prototype]] of newly created objects to make them behave like instances of this particular class. const isActive = button . remove('active'); }). log when a div is clicked. The querySelector method returns the first element that matches the provided selector or null if no element matches. I need the function to check if the element contains the classes that I am supplying it with. I have tested it. contains method to check for a class: // returns 'true' if the class exists, and 'false' if it doesn't. contains() method returns true if a class name is found else it returns false (if a class name is not found). Here's a step-by-step approach: 1. How to check class of multiple class elements in javascript, without jquery Problem is, it seems to be returning an array of all the classes that the element contains, which is not what I want. so you can access it using index. I'm ok with the function that Denys Séguret posted, it looks elegant and I like it. In the letter case, it also needs trimming, because the browser creates empty text nodes around comments. This covers pseudo-classes like ":hover" and ":active This does the trick: function findAncestor (el, cls) { while ((el = el. Feb 2, 2024 · In addition, selecting elements by class in JavaScript becomes a bit more tricky if they are tagged with multiple classes. getElementById('example'); console. e; Feb 22, 2024 · If you're looking for JavaScript has class or JavaScript hasclass then there's a high probability that you used to work with jQuery in the past. Not sure if this meets your needs though. classList . The classList Property. contains() method to check if an element has a class name or not. Also, an element can have many classes, so if you want to test if it has a particular class you need to do something like the following: Mar 10, 2022 · The same can’t be said for document. className) // notice the \b command for whole word 'myClass' Nov 3, 2023 · Now let‘s look at how to do it in JavaScript. Using classList is a convenient alternative to accessing an element's list of classes as a space-delimited string via element. body. Sep 20, 2010 · If you want to see if the target element has a parent which matches some selector use the . It's very simple with the condition IF. Feb 23, 2011 · I use a simple/minimal solution, one line, cross browser, and works with legacy browsers as well: /\bmyClass/. indexOf('thisClass') === 0 How do i also check if element or any of its parents have the class? Jan 21, 2024 · In order to do so, you might need a handful of utilities, such as checking if an element has a class, adding, removing or toggling a class. Check if HTML element has a class. classList Have you ever wondered how to check if an element has a class in JavaScript? Knowing whether an element has a specific class can be quite useful in many scenarios, such as manipulating the element’s appearance or behavior dynamically. Step 2. Aug 29, 2012 · This code doesn't work if element has more than one class. your-element'); // Check if the element has the class 'awesome-class' if (element. I have a markup structure that has left me doing this sort of thing in the code: $(elem). Asking for help, clarification, or responding to other answers. textContent); }); How to Check If an Element Contains a Class in JavaScript. For this I am trying to look for an active class on menu item for home, and if it has the active class, then add a different class to the main webpage's div. ztzw hdrvtpg kzgr vqo pnevi xqemi rwnh edtm peta pxxk uoja chiv uysr hpo qnfc