---
title: "How to add CSS on html using JavaScript?"
description: "How to add CSS on html using JavaScript?"
author: "Ravi Vishwakarma"
published: 2021-07-19
canonical: https://answers.mindstick.com/qa/93764/how-to-add-css-on-html-using-javascript
category: "web application"
tags: ["javascript", "html5", "css cascading style sheets"]
reading_time: 1 minute
---
# How to add CSS on html using JavaScript?
How to [add](https://yourviews.mindstick.com/story/4883/5-signs-you-need-to-add-more-protein-to-your-diet) [CSS](https://www.mindstick.com/forum/514/background-gradient-ie7-css-problem) on [html](https://www.mindstick.com/articles/12368/why-are-html-themes-the-first-selection-of-designers) using [JavaScript](https://www.mindstick.com/articles/1530/design-a-simple-stylish-calculator-using-html-css-and-javascript)?
## Answers
### Answer by Ethan Karla
## In JavaScript, we can add css through style attribute or setAttribute function.
```
Style Attribute
```
```
Syntax
element.style.style-property=value;
```
```
example
Hello World!
```
**setAttribute()**
```
Syntax
element.setAttribute(attributename, attributevalue);
```
```
example
Hello World
Click the button to add a class attribute with the value of 'democlass' to the h1 element.