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20 lines
653 B
JavaScript
20 lines
653 B
JavaScript
/**
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* This function transforms a JS object `ObjMap<Promise<T>>` into
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* a `Promise<ObjMap<T>>`
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*
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* This is akin to bluebird's `Promise.props`, but implemented only using
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* `Promise.all` so it will work with any implementation of ES6 promises.
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*/
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export default function promiseForObject(object) {
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var keys = Object.keys(object);
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var valuesAndPromises = keys.map(function (name) {
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return object[name];
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});
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return Promise.all(valuesAndPromises).then(function (values) {
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return values.reduce(function (resolvedObject, value, i) {
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resolvedObject[keys[i]] = value;
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return resolvedObject;
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}, Object.create(null));
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});
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}
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