get css from js code example

Example 1: access css property using javascript

const element = document.querySelector('.element')
const style = getComputedStyle(element)

Example 2: css in js

JSS is an authoring tool for CSS which allows you to use JavaScript to describe styles in a declarative, conflict-free and reusable way. It can compile in the browser, server-side or at build time in Node.

JSS is framework agnostic. It consists of multiple packages: the core, plugins, framework integrations and others.