@naturalcycles/js-lib/dist/string/safeJsonStringify.js

Standard library for universal (browser + Node.js) javascript

/**
 * JSON.stringify that avoids circular references, prints them as [Circular ~]
 *
 * Based on: https://github.com/moll/json-stringify-safe/
 */
export function _safeJsonStringify(obj, replacer, spaces, cycleReplacer) {
    try {
        // Try native first (as it's ~3 times faster)
        return JSON.stringify(obj, replacer, spaces);
    }
    catch {
        // Native failed - resort to the "safe" serializer
        return JSON.stringify(obj, serializer(replacer, cycleReplacer), spaces);
    }
}
/* eslint-disable @typescript-eslint/no-unused-expressions, no-bitwise, no-implicit-coercion */
function serializer(replacer, cycleReplacer) {
    const stack = [];
    const keys = [];
    cycleReplacer ??= (_key, value) => {
        if (stack[0] === value)
            return '[Circular ~]';
        return '[Circular ~.' + keys.slice(0, stack.indexOf(value)).join('.') + ']';
    };
    return function (key, value) {
        if (stack.length > 0) {
            const thisPos = stack.indexOf(this);
            ~thisPos ? stack.splice(thisPos + 1) : stack.push(this);
            ~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key);
            if (~stack.indexOf(value)) {
                value = cycleReplacer.call(this, key, value);
            }
        }
        else {
            stack.push(value);
        }
        return replacer == null ? value : replacer.call(this, key, value);
    };
}