25 lines
754 B
Markdown
25 lines
754 B
Markdown
---
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title: parseCookie
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tags: utility,string,intermediate
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---
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Parse an HTTP Cookie header string and return an object of all cookie name-value pairs.
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Use `String.prototype.split(';')` to separate key-value pairs from each other.
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Use `Array.prototype.map()` and `String.prototype.split('=')` to separate keys from values in each pair.
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Use `Array.prototype.reduce()` and `decodeURIComponent()` to create an object with all key-value pairs.
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```js
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const parseCookie = str =>
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str
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.split(';')
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.map(v => v.split('='))
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.reduce((acc, v) => {
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acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim());
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return acc;
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}, {});
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```
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```js
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parseCookie('foo=bar; equation=E%3Dmc%5E2'); // { foo: 'bar', equation: 'E=mc^2' }
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``` |