@mark01/express-utils/lib/util/catch-unknown.js

npm package that contains utilities for express.js

function isObject(value) {
    return typeof value === 'object' && value != null;
}
function getObjectMessage(obj) {
    if (typeof obj.message === 'string') {
        return obj.message;
    }
    if (obj.toString !== Object.prototype.toString) {
        return obj.toString();
    }
    try {
        return JSON.stringify(obj);
    }
    catch {
        return String(obj);
    }
}
export function isError(err) {
    return (isObject(err) &&
        typeof err.name === 'string' &&
        typeof err.message === 'string' &&
        (!('stack' in err) || typeof err.stack === 'string'));
}
export function asError(err) {
    if (isError(err))
        return err;
    const error = new Error(isObject(err) ? getObjectMessage(err) : String(err));
    if (isObject(err) && err.constructor && err.constructor.name !== 'Object') {
        error.name = err.constructor.name;
    }
    else if (!isObject(err)) {
        error.name = typeof err;
    }
    else {
        error.name = 'Object';
    }
    return error;
}