@microsoft/microsoft-graph-client/lib/es/src/ValidatePolyFilling.js

/**
 * -------------------------------------------------------------------------------------------
 * Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.
 * See License in the project root for license information.
 * -------------------------------------------------------------------------------------------
 */
/**
 * @constant
 * @function
 * Validates availability of Promise and fetch in global context
 * @returns The true in case the Promise and fetch available, otherwise throws error
 */
export const validatePolyFilling = () => {
    if (typeof Promise === "undefined" && typeof fetch === "undefined") {
        const error = new Error("Library cannot function without Promise and fetch. So, please provide polyfill for them.");
        error.name = "PolyFillNotAvailable";
        throw error;
    }
    else if (typeof Promise === "undefined") {
        const error = new Error("Library cannot function without Promise. So, please provide polyfill for it.");
        error.name = "PolyFillNotAvailable";
        throw error;
    }
    else if (typeof fetch === "undefined") {
        const error = new Error("Library cannot function without fetch. So, please provide polyfill for it.");
        error.name = "PolyFillNotAvailable";
        throw error;
    }
    return true;
};
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