30-seconds-of-code/snippets/parseCookie.md

parseCookie

Parse an HTTP Cookie header string and return an object of all cookie name-value pairs.

Use String.split(';') to separate key-value pairs from each other. Use Array.map() and String.split('=') to separate keys from values in each pair. Use Array.reduce() and decodeURIComponent() to create an object with all key-value pairs.

const parseCookie = str =>
  str.split(';').map(v => v.split('=')).reduce((acc,v) => {acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim()); return acc},{});

parseCookie('foo=bar; equation=E%3Dmc%5E2'); // { foo: 'bar', equation: 'E=mc^2' }