set multiple attributes css javascript

Set Multiple Attributes in CSS using JavaScript

When it comes to styling web pages, CSS is undoubtedly the king. It allows you to control almost every aspect of the appearance of your website. However, sometimes you may want to change multiple attributes of an element at once. In such cases, setting the attributes one by one can be a tedious task. Luckily, JavaScript comes to the rescue.

Using the style Property

The easiest way to set multiple CSS properties using JavaScript is by using the style property of the element. This property is an object that contains all the CSS properties of the element. You can set or modify these properties by assigning values to them.

const element = document.querySelector('#my-element'); = 'red'; = 'white'; = '16px';

In the above example, we are selecting an element with the ID my-element and setting its background color to red, text color to white, and font size to 16 pixels. Notice how we are accessing the style property of the element and setting its properties using dot notation.

Using the setAttribute Method

If you want to set CSS properties that are not part of the style property, you can use the setAttribute method. This method allows you to set any attribute of an element, including CSS properties.

const element = document.querySelector('#my-element');
element.setAttribute('class', 'my-class');
element.setAttribute('data-attribute', 'some-value');
element.setAttribute('style', 'background-color: red; color: white; font-size: 16px;');

In the above example, we are setting the class, data-attribute, and style attributes of an element. Notice how we are passing the CSS styles as a string to the style attribute.

Using the CSS Object

If you want to set multiple CSS properties using JavaScript but don't want to modify the element's style property, you can use the CSS object. This object allows you to create a CSS style rule and apply it to an element.

const element = document.querySelector('#my-element');
const css = new CSSStyleDeclaration();
css.backgroundColor = 'red';
css.color = 'white';
css.fontSize = '16px'; = css.cssText;

In the above example, we are creating a new CSSStyleDeclaration object and setting its properties. We then set the cssText property of the element's style object to the cssText property of our CSSStyleDeclaration object.


Setting multiple CSS properties using JavaScript is a useful technique that can save you a lot of time and effort. Whether you prefer using the style property, the setAttribute method, or the CSS object, make sure to choose the method that best suits your needs and style.

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