JSFiddle - React, Tailwind, and code Playground

JavaScript

var description = "asdjipasd https://www.google.de/?client=safari#q=google+params&gfe_rd=cr\n\nsdasiojdas asijsadasd";

var sanitized = description.split(/\n/)[0];
var matched = /https/.exec(sanitized).index;
console.log(description.substring(matched, sanitized.length));