JSFiddle - React, Tailwind, and code Playground
JavaScript
const DateAliasPrefix = 'date';
const getDateFromAlias = (alias) => {
const date = alias.replace(DateAliasPrefix, '');
const year = date.slice(0, 4);
const month = date.slice(4, 6);
const day = date.slice(6);
return `${year}-${month}-${day}`
};
console.log(getDateFromAlias('date20201112'))