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RienNeVaPlus/object.querySelector.ts

Created September 20, 2022 02:19
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A querySelector utility to fetch values from an object by providing a path string. `querySelector({a:[{b:3]}, 'a[0].b') === 3`
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object.querySelector.ts
const querySelectorRegex = /(?<=\[)(?!")[^\]]+|(?<=\[")[^"]+|[^."[\]]+/g
export function objectQuerySelector(obj: any, path: string){
const match = path.match(objectQueryRegex)
return match ? match.reduce((res, prop) => res[prop], obj) : undefined
}
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Example:

const obj = {a: [ {b: true} ]}
const value = querySelector(obj, 'a[0].b') // true

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