globalPromiseRejectionCatcher.js

import { Alert } from "react-native";

export default function() {
    require("promise/setimmediate/rejection-tracking").enable({
        allRejections: true,
        onUnhandled: (id, error = {}) => {
            let message;
            let stack;

            const stringValue = Object.prototype.toString.call(error);

            if (stringValue === "[object Error]") {
                message = Error.prototype.toString.call(error);
                stack = error.stack;
            } else {
                message = require("pretty-format")(error);
            }

            const warning =
                `${`Possible Unhandled Promise Rejection (id: ${id}):\n` +
                `${message}\n`}${
                    stack == null ? "" : stack}`;

            Alert.alert(
                "PROMISE ERROR",
                warning,
                [{ text: "Ok" }]
            );
        },
        onHandled: () => {}
    });
}