next/dist/lib/coalesced-function.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.withCoalescedInvoke = withCoalescedInvoke;
const globalInvokeCache = new Map();
function withCoalescedInvoke(func) {
    return async function(key, args) {
        const entry = globalInvokeCache.get(key);
        if (entry) {
            return entry.then((res)=>({
                    isOrigin: false,
                    value: res.value
                })
            );
        }
        async function __wrapper() {
            return await func.apply(undefined, args);
        }
        const future = __wrapper().then((res)=>{
            globalInvokeCache.delete(key);
            return {
                isOrigin: true,
                value: res
            };
        }).catch((err)=>{
            globalInvokeCache.delete(key);
            return Promise.reject(err);
        });
        globalInvokeCache.set(key, future);
        return future;
    };
}

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