1/* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 17class CheckEmptyUtil { 18 /** 19 * Check obj is empty. 20 * 21 * @param {object} obj 22 * @return {boolean} true(empty) 23 */ 24 isEmpty(obj: object | string): boolean { 25 return (typeof obj === 'undefined' || obj === null || obj === ''); 26 } 27 28 /** 29 * Check str is empty. 30 * 31 * @param {string} str 32 * @return {boolean} true(empty) 33 */ 34 checkStrIsEmpty(str: string): boolean { 35 return str.trim().length === 0; 36 } 37 38 /** 39 * Check array is empty. 40 * 41 * @param {Array}arr 42 * @return {boolean} true(empty) 43 */ 44 isEmptyArr(arr: Array<string>) { 45 return arr.length === 0; 46 } 47} 48 49export default new CheckEmptyUtil(); 50 51