Write css code in javascript

Javascript Set CSS Set CSS styles with javascript

2. Global styles

 var style = document.createElement('style'); style.innerHTML = ` #target < color: blueviolet; >`; document.head.appendChild(style); 

3. CSSOM insertRule

 var style = document.createElement('style'); document.head.appendChild(style); style.sheet.insertRule('#target '); 

While it might look similar to the 2nd option, it’s definitely different.
As you can see in Chrome devtools, tag is empty, but the style (darkseagreen color) is applied to the element. Also the color can’t be changed via devtools because Chrome doesn’t allow editing dynamic CSS styles. Actually such behavior was the motivation to write this post. A popular CSS-in-JS library Styled Components use this feature to inject styles in production mode because of performance. This feature might be undesirable in specific projects or environments and some folks complain about it in the project’s issues.

4. Constructable Stylesheets (July 2019 update)

// Create our shared stylesheet: const sheet = new CSSStyleSheet(); sheet.replaceSync('#target '); // Apply the stylesheet to a document: document.adoptedStyleSheets = [sheet]; 

More details are here.
This option is only valid for Chrome, so use with caution. Do you know other options to add styles with javascript? What is your preferred option these days? Thanks for reading!

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CSS Write CSS with JS: Dynamic Style Manipulation and Best Practices

Learn how to write CSS with JavaScript for more flexibility and dynamic style manipulation. Explore CSSStyleSheet object, CSS-in-JS, and vanilla JavaScript with tips and best practices for organizing and changing CSS.

• Creating CSSStyleSheet object with JavaScript
• Adding CSS with JavaScript using new style node
• CSS styles in JavaScript (setting and getting)
• Using CSS-in-JS
• Dynamic style manipulation with JavaScript
• Tips and best practices for manipulating CSS with JavaScript
• Other simple CSS code examples with JavaScript
• Conclusion
• Can I write CSS-in-JS?
• How to add CSS style using JavaScript?
• Can you mix CSS and JavaScript?
• How to target CSS in JavaScript?

CSS and JavaScript are two essential technologies for web development. While CSS is used for styling web pages, JavaScript is used for adding interactivity and dynamic behavior to web pages. Writing CSS with JavaScript can offer more flexibility and Dynamic style manipulation . In this article, we will explore different ways to manipulate css with javascript , including CSSStyleSheet object, CSS-in-JS, and vanilla JavaScript.

Creating CSSStyleSheet object with JavaScript

CSSStyleSheet object can be created from JavaScript using document.createElement(‘style’) and document.head.appendChild() . CSS rules can be added to CSSStyleSheet object using insertRule() method. Here is an example code:

const style = document.createElement('style') document.head.appendChild(style) const sheet = style.sheet sheet.insertRule('body < background-color: blue; >', 0) 

Adding CSS with JavaScript using new style node

A new style node can be created with document.createElement(‘style’) and added to the document with document.head.appendChild() . CSS rules can be added to the style node using innerHTML property. Here is an example code:

const style = document.createElement('style') style.innerHTML = 'body < background-color: blue; >' document.head.appendChild(style) 

CSS styles in JavaScript (setting and getting)

How to set CSS properties and styles in JavaScript. Also how to get CSS.This video covers Duration: 6:38

Using CSS-in-JS

CSS-in-JS allows all CSS to be written in JavaScript, offering more flexibility and dynamic style manipulation. Popular CSS-in-JS frameworks include styled-components, emotion, and material-ui/styles. Here is an example code using styled-components:

import styled from 'styled-components'const StyledButton = styled.button` background-color: blue; color: white; `function MyComponent() < return ( 
Click me! 
 ) > 

Dynamic style manipulation with JavaScript

CSS properties can be changed with JavaScript by setting or returning one or more style properties for the selected elements using the css() method. CSS variables can be changed with JavaScript using setProperty() method. Here is an example code:

const element = document.querySelector('.my-element') element.style.backgroundColor = 'blue' element.style.setProperty('--my-var', 'red') 

Tips and best practices for manipulating CSS with JavaScript

best practices for organizing css include keeping it consistent, formatting readable CSS, commenting CSS, and creating logical sections. Tips for changing CSS using JavaScript include setting a class on the element and styling it with CSS, using the style property to inline set the style of an element, and using the setProperty() or setAttribute() method. Latest advancements in CSS include CSS Grid and CSS Flexbox. Common issues with CSS and JavaScript include browser compatibility and performance concerns. cheatsheets for css and javascript are available online to help with syntax and common use cases. Benefits of CSS-in-JS include easier maintenance and organization of styles, and the ability to extend design system styles into custom components.

Other simple CSS code examples with JavaScript

In Javascript , in particular, how to add css in js code example

In Javascript case in point, how to give css style in javascript code example

document.getElementById("myH1").style.color = "red";

In Javascript , for example, CSS on Javascript code sample

div.style.color = 'blue'; // adds the indicated style rulediv.style.cssText = 'color: blue; background: white'; // adds several style rulesdiv.setAttribute('style', 'color: blue; background: white'); // adds several style rules

In Javascript case in point, add css style by javascript code example

//Create a new stylesheet const sheet = new CSSStyleSheet(); //Add some CSS to the stylesheet sheet.replaceSync('#title '); // Apply the stylesheet to a document: document.adoptedStyleSheets = [sheet]; 

Conclusion

Writing CSS with JavaScript offers more flexibility and dynamic style manipulation. There are different ways to manipulate CSS with JavaScript, including CSSStyleSheet object, CSS-in-JS, and vanilla JavaScript. Best practices for organizing CSS and tips for changing CSS using JavaScript can help improve web development skills . By following these practices, developers can enhance their web development skills and create dynamic and professional-looking websites.

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