JS: set pseudo element content :before OR :active

JS-setPseudoElementContent.js

/*
 * github.com/devzom / Jakub Zomerfeld
 *  * (c) 15 / 10 / 2020
 * Function for setting an pseudo element property :after / :before
 */
// 
// ES6<
function setPseudoElementContent(selector, value) {    
    document.styleSheets[0].addRule(selector, 'content: "' + value + '";');
}

setPseudoElContent('.class::before', 'write text here');

// 
// 
// ES6 
const setPseudoElementContent = (selector, value) => {
    document.styleSheets[0].addRule(selector, `content: "${value}";`);
}
setPseudoElContent('.class::after', 'write text here');