ts_temp/is/empty.js

import isNil from './nil';
import isArray from './array';
import isString from './string';
import isObject from './object';
/**
 * Checks if `test` is empty.
 *
 * @param {*} test The value to check.
 * @returns {boolean} Returns `true` if `test` is empty, else `false`.
 * @example
 *
 * isEmpty([]); // => true
 * isEmpty(null); // => true
 * isEmpty({}); // => true
 * isEmpty(''); // => true
 * isEmpty('test'); // => false
 * isEmpty({ a: 5 }); // => false
 * isEmpty([1]); // => false
 */
export default (test) => {
    switch (true) {
        case isNil(test):
            return true;
        case isString(test):
            return test === '';
        case isArray(test):
            return test.length === 0;
        case isObject(test):
            return Object.keys(test).length === 0;
    }
    return false;
};