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parseCookie javascript Code Snippet in 2024

browserstringintermediate

Last Updated: 4 November 2024

Parses an HTTP Cookie header string, returning an object of all cookie name-value pairs.

  • Use String.prototype.split(';') to separate key-value pairs from each other.
  • Use Array.prototype.map() and String.prototype.split('=') to separate keys from values in each pair.
  • Use Array.prototype.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' }

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