https://www.w3schools.com › jsref › met_element_setattribute.asp

Add a class attribute to an element: element.setAttribute("class", "democlass"); Before: The Element Object. After: The Element Object. Try it Yourself » More examples below. Description. The setAttribute() method sets a new value to an attribute. If the attribute does not exist, it is created first. See Also: The getAttribute () Method.

https://developer.mozilla.org › fr › docs › Web › API › Element › setAttribute

La méthode setAttribute(), rattachée à l'interface Element, ajoute un nouvel attribut ou change la valeur d'un attribut existant en utilisant la valeur fournie. Si l'attribut existe déjà, la valeur est mise à jour ; sinon, un nouvel attribut est ajouté avec le nom et la valeur spécifiés.

https://developer.mozilla.org › en-US › docs › Web › API › Element › setAttribute

The setAttribute() method of the Element interface sets the value of an attribute on the specified element. If the attribute already exists, the value is updated; otherwise a new attribute is added with the specified name and value.

https://stackoverflow.com › questions › 35190633

I have a div element and would like to append new style attributes to it. I have tried to do it like this: element.setAttribute('style', 'property: value'); And it works, but if that element already had styles applied, they will all get overwritten. Lets say I have this situation: HTML: <div id="styled"></div> JavaScript:

https://fr.cyberaxe.org › article › how-to-add-attribute-to-dom-element-in-javascript

JavaScript fournit la méthode setAttribute pour ajouter un attribut à l'élément DOM. La méthode ajoute et met à jour les valeurs d'attribut.

https://developer.mozilla.org › en-US › docs › Web › API › Element › setAttributeNode

The setAttributeNode() method of the Element interface adds a new Attr node to the specified element. If you don't need to work with the attribute node (such as cloning from another element) before adding it, you can use the setAttribute() method instead. Syntax. js. setAttributeNode(attribute) Parameters. attribute.

https://www.javascripttutorial.net › dom › attributes › set-the-value-of-an-attribute

To set a value of an attribute on an element, you use the setAttribute () method: element.setAttribute(name,value);Code language:CSS(css) For example, to set the title attribute of the anchor element, you use the following code:

https://javascript.info › dom-attributes-and-properties

We can add a method as well: document. body.sayTagName = function() { alert(this. tagName); }; . document. body.sayTagName(); We can also modify built-in prototypes like Element.prototype and add new methods to all elements: Element. prototype.sayHi = function() { alert(`Hello, I'm ${this.tagName}`); }; . document. documentElement.sayHi(); .