discourse/app/assets/javascripts/pretty-text/guid.js.es6

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/*eslint no-bitwise:0 */
// http://stackoverflow.com/a/8809472/17174
export default function() {
let d = new Date().getTime();
if (window.performance && typeof window.performance.now === "function") {
d += performance.now(); //use high-precision timer if available
}
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
const r = (d + Math.random() * 16) % 16 | 0;
d = Math.floor(d/16);
return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
};