Name: Clean Object by Values
Rating: 4.3 (1888 reviews)
Author: nombrekeff

Clean Object by Values

Keff - Mar 24 '20 -

Function to remove specific values from an object (including nested values), by default only null values are removed, but an array of values to remove can be passed as second argument:

function cleanObject(obj, valueToClean = [null]) {
    if (!isObject(obj)) { // isObject defined below
        throw new Error('"obj" argument must be of type "object"');
    }

    const cleanObj = {};
    let filter = valueToClean;

    for (let key in obj) {
        const objValue = obj[key];

        if (Array.isArray(valueToClean)) {
            filter = val => valueToClean.includes(val);
        } else if (typeof valueToClean !== 'function') {
            filter = val => val === valueToClean;
        }

        if (isObject(objValue)) {
            cleanObj[key] = cleanObject(objValue, filter);
        } else if (!filter(objValue)) {
            cleanObj[key] = objValue;
        }
    }
    return cleanObj;
}

isObject function from: Is value an object

function isObject(val){
  return (
    val != null && 
    typeof val === 'object' && 
    Array.isArray(val) === false
  );
}

Usage:

const clean = cleanObject({ name: 'Manolo', email: null, tags: null });
// > { name: 'Manolo' }

const clean = cleanObject({ name: 'Manolo', email: null, tags: [] }, [null, []]);
// > { name: 'Manolo' }