@newdash/newdash/isEmpty.js

javascript/typescript utility library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.isEmpty = void 0;
const baseKeys_1 = __importDefault(require("./.internal/baseKeys"));
const getTag_1 = __importDefault(require("./.internal/getTag"));
const isPrototype_1 = __importDefault(require("./.internal/isPrototype"));
const isArguments_1 = __importDefault(require("./isArguments"));
const isArrayLike_1 = __importDefault(require("./isArrayLike"));
const isBuffer_1 = __importDefault(require("./isBuffer"));
const isTypedArray_1 = __importDefault(require("./isTypedArray"));
/**
 * Used to check objects for own properties.
 * @ignore
 */
const hasOwnProperty = Object.prototype.hasOwnProperty;
/**
 * @ignore
 */
const mapTag = "[object Map]";
/**
 * @ignore
 */
const setTag = "[object Set]";
/**
 * @ignore
 * @internal
 * @private
 */
const isArray = Array.isArray;
/**
 * Checks if `value` is an empty object, collection, map, or set.
 *
 * Objects are considered empty if they have no own enumerable string keyed
 * properties.
 *
 * Array-like values such as `arguments` objects, arrays, buffers, strings, or
 * jQuery-like collections are considered empty if they have a `length` of `0`.
 * Similarly, maps and sets are considered empty if they have a `size` of `0`.
 *
 * heavy operation
 *
 * @since 5.5.0
 * @category Lang
 * @param value The value to check.
 * @returns Returns `true` if `value` is empty, else `false`.
 * @example
 *
 * ```js
 * isEmpty(null)
 * // => true
 *
 * isEmpty(true)
 * // => true
 *
 * isEmpty(1)
 * // => true
 *
 * isEmpty([1, 2, 3])
 * // => false
 *
 * isEmpty('abc')
 * // => false
 *
 * isEmpty({ 'a': 1 })
 * // => false
 * ```
 */
function isEmpty(value) {
    if (value == null) {
        return true;
    }
    if ((0, isArrayLike_1.default)(value) &&
        (isArray(value) || typeof value == "string" || typeof value["splice"] == "function" ||
            (0, isBuffer_1.default)(value) || (0, isTypedArray_1.default)(value) || (0, isArguments_1.default)(value))) {
        return !value.length;
    }
    const tag = (0, getTag_1.default)(value);
    if (tag == mapTag || tag == setTag) {
        return !value.size;
    }
    if ((0, isPrototype_1.default)(value)) {
        return !(0, baseKeys_1.default)(value).length;
    }
    for (const key in value) {
        if (hasOwnProperty.call(value, key)) {
            return false;
        }
    }
    return true;
}
exports.isEmpty = isEmpty;
exports.default = isEmpty;