Nov 28, 2016 · To add an additional class to an element: To add a class to an element, without removing/affecting existing values, append a space and the new classname, like so: document.getElementById("MyElement").className += " MyClass"; To change all classes for an element: To replace all existing classes with one or more new classes, set the className ...

3 ways to add a class to a DOM element in JavaScript. There are multiple ways of doing this. I will show you three ways to add classes and clarify some benefits of each way. You can use any given method to add a class to your element, another way to check for, change or remove them.

May 12, 2020 · "document.getElementsByClassName('form-control')" that gives you a node list of all the inputs with that class, and in your case you need just the first so it should be let element = document.getElementsByClassName('form-control')[0], or you can use the .querySelector() example let element = document.querySelector(".form-control"), note that .querySelector() …

Aug 17, 2016 · When an element already has a class name defined, its influence on the element is tied to its position in the string of class names. Later classes override earlier ones, if there is a conflict. Adding a class to an element ought to move the class name to the sharp end of the list, if it exists already.

Feb 8, 2012 · I have a jsp page in which rows of a table are added dynamically. Here I am using a different java script than the one in my previous question. Here I could add elements into table columns, but I could not apply style class which is already defined in …

Add class to first child using javascript. 1. How add class to parent element. 2. Add class to parent ...

Aug 9, 2016 · Here's a different approach for many DOM elements with the same class name by selecting path key in the eventListener object. Add an event listener to the immediate parent class wrapping all the child elements with the same class and get the path by selecting the first key in the event object. E.g say you want to edit table cells of a table

May 14, 2013 · .current_class {background-color:green}; And this is the javascript code used to add the class to the td: var cell = $("#timetable_table").find("tr").eq(current+1).find("td").eq(date.getDay()); I know cell is the correct td because i can cell.text("foo") and the correct cell is modified, but when i do: …

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).

Aug 19, 2019 · It does not add the class: document.getElementsByTagName('nav')[0].firstChild.className = "current" It should return the first child of the nav element which is an <a> which does not happen.