@writ/utils/request-fetch-error.js

My tool kit

'use strict';
/**
 * 规范化错误
 * @param {Error} err
 */
export default function error(err) {
    var i = 0;
    var e = new Error();
    var args = Array.prototype.slice.call(arguments, 1);

    if (err instanceof Error) {
        for (const key in err) {
            if (err.hasOwnProperty(key)) {
                e[key] = err[key];
            }
        }
    }

    e.name = 'FetchError';
    e.message = e.message.replace(/\$\d+/g, meta => args ? args[i++] : meta);
    return e;
}