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Convert URL parameters to object

Written byPhuoc Nguyen
Created
01 Feb, 2021
Last updated
13 Oct, 2021
Category
Misc
JavaScript version
getUrlParams.js
const getUrlParams = (query) =>
Array.from(new URLSearchParams(query)).reduce(
(p, [k, v]) => Object.assign({}, p, { [k]: p[k] ? (Array.isArray(p[k]) ? p[k] : [p[k]]).concat(v) : v }),
{}
);
TypeScript version
getUrlParams.ts
const getUrlParams = (query: string): Record<string, string> => (
Array.from(new URLSearchParams(query)).reduce((p, [k, v]) => Object.assign({}, p, { [k]: p[k] ? (Array.isArray(p[k]) ? p[k] : [p[k]]).concat(v) : v }), {} as Record<string, string>)
);
Examples
examples.js
getUrlParams(location.search); // Get the parameters of the current URL

getUrlParams('foo=Foo&bar=Bar'); // { foo: "Foo", bar: "Bar" }

// Duplicate key
getUrlParams('foo=Foo&foo=Fuzz&bar=Bar'); // { foo: ["Foo", "Fuzz"], bar: "Bar" }

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