typescript-immutable-helper/dist/deepFreeze.js

Helpers for handling immutable objects with typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * freezes an object recursively
 * @param {T} object object child freeze
 * @returns {T} frozen object
 */
function deepFreeze(object) {
    Object.freeze(object);
    // skip deep freezing of non objects and functions
    if (typeof object !== 'object') {
        return object;
    }
    Object.getOwnPropertyNames(object)
        .filter(function (prop) { return object[prop] !== null && !Object.isFrozen(object[prop]); })
        .forEach(function (prop) { return deepFreeze(object[prop]); });
    return object;
}
exports.deepFreeze = deepFreeze;
/**
 * checks if object is deep frozen with {@link deepFreeze]
 * @param object
 * @returns {boolean}
 */
function isDeepFrozen(object) {
    if (Object.isFrozen(object)) {
        // skip deep testing of non objects and functions
        if (typeof object !== 'object') {
            return true;
        }
        return Object.getOwnPropertyNames(object)
            // only objects, no functions
            .filter(function (prop) { return object[prop] !== null && typeof object === 'object'; })
            .every(function (prop) { return isDeepFrozen(object[prop]); });
    }
    else {
        return false;
    }
}
exports.isDeepFrozen = isDeepFrozen;
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