@apollo/client/utilities/internal/dealias.js

A fully-featured caching GraphQL client.

import { Kind } from "graphql";
// Note: this is a shallow dealias function. We might consider a future
// improvement of dealiasing all nested data. Until that need arises, we can
// keep this simple.
export function dealias(fieldValue, selectionSet) {
    if (!fieldValue) {
        return fieldValue;
    }
    const data = { ...fieldValue };
    for (const selection of selectionSet.selections) {
        if (selection.kind === Kind.FIELD && selection.alias) {
            data[selection.name.value] = fieldValue[selection.alias.value];
            delete data[selection.alias.value];
        }
    }
    return data;
}
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