@adobe/uxp-optimized/common/memoize.js

Library of react components optimized for Adobe's Unified Extensibility Platform

"use strict";
/*
Copyright 2019 Adobe
All Rights Reserved.

NOTICE: Adobe permits you to use, modify, and distribute this file in
accordance with the terms of the Adobe license agreement accompanying
it. If you have received this file from a source other than Adobe,
then your use, modification, or distribution of it requires the prior
written permission of Adobe.
*/
Object.defineProperty(exports, "__esModule", { value: true });
function memoize(fn) {
    const symbol = Symbol();
    const cache = new WeakMap();
    return (input) => {
        const e = Object.isExtensible(input);
        let value = e ? input[symbol] : cache.get(input);
        if (value === undefined) {
            value = fn(input);
            if (e) {
                input[symbol] = value;
            }
            else {
                cache.set(input, value);
            }
        }
        return value;
    };
}
exports.default = memoize;