remove undefined, empty string, empty array key values in Object

removenested.js

            function deepCopy(obj) {
                if (typeof obj !== 'object' || obj === null) {
                    return obj; // Return primitive values and null as is
                }

                const copy = Array.isArray(obj) ? [] : {};

                for (let key in obj) {
                    copy[key] = deepCopy(obj[key]);
                }

                return copy;
            }

            function loopNestedObjectsAndRemoveEmpty(obj) {
                for (let key in obj) {
                    if (Object.prototype.toString.call(obj[key]) === '[object Object]' && obj[key] !== null) {
                        loopNestedObjectsAndRemoveEmpty(obj[key]);
                    } else {
                        if (Object.prototype.toString.call(obj[key]) === '[object Array]' && obj[key].length === 0) {
                            delete obj[key];
                        } else if (obj[key] === '') {
                            delete obj[key];
                        }
                    }
                }
                return obj;
            }

            const obj1 = {
                hello: {
                    age: 45,
                    pass: '',
                    creek: '',
                    address: {
                        street: '12, jakdsf street',
                        city: '',
                        pincode: [],
                    },
                },
            };
            
            const retObj = loopNestedObjectsAndRemoveEmpty(deepCopy(obj1));
            console.log(retObj);
            console.log(obj1);