guardz/dist/stringify.js

A simple and lightweight TypeScript type guard library for runtime type validation.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.stringify = stringify;
/**
 * Converts a JavaScript value to a formatted JSON string.
 *
 * @param value - The value to convert to a JSON string.
 * @returns A formatted JSON string or the string 'undefined' if the value is undefined.
 */
function stringify(value) {
    if (value === undefined) {
        return 'undefined';
    }
    if (value instanceof Date) {
        return isNaN(value.getTime()) ? 'Invalid Date' : value.toISOString();
    }
    if (typeof value === 'function') {
        return 'function';
    }
    if (value instanceof Error) {
        return 'Error';
    }
    if (typeof value === 'number' && isNaN(value)) {
        return 'NaN';
    }
    if (value === Infinity) {
        return 'Infinity';
    }
    if (value === -Infinity) {
        return '-Infinity';
    }
    return JSON.stringify(value, null, 2);
}