verror-0/lib/esm/werror.js

VError without dependencies on top of nodejs standart library

import { parseArgs } from './parse-args.js';
import { VError } from './verror.js';
/*
 * Like JavaScript's built-in Error class, but supports a "cause" argument which
 * is wrapped, not "folded in" as with VError.    Accepts a printf-style message.
 * The cause argument can be null.
 */
export class WError extends VError {
    constructor(...args) {
        const parsed = parseArgs({
            argv: args
        });
        const options = parsed.options;
        options.skipCauseMessage = true;
        options.name = options.name ?? 'WError';
        super(options, '%s', parsed.shortmessage);
    }
    toString() {
        let str = (this.hasOwnProperty('name') && this.name) || this.constructor.name || this.constructor.prototype.name;
        if (this.message)
            str += ': ' + this.message;
        if ('jse_cause' in this && this.jse_cause && this.jse_cause.message) {
            str += '; caused by ' + this.jse_cause.toString();
        }
        return str;
    }
}