Traverse an array of objects using recursion

FlatBooks.js

let isObjectEmpty = (obj) => {
    return Object.keys(obj).length === 0;
};

let isPrimitive = (element) => {
    return (typeof element === 'object') ? element === null : typeof element !== 'function';
};

function TraverseRecursiveArray (myarray, pos, obj){

    if (!Array.isArray(myarray) || myarray.length <= 0) return [];
    
    let hasPropArray = false;
    let posSubArray = 0;
    let resultObj = {};
    let output = [];   
    if (pos === undefined) pos = 0;     
    
    if (typeof myarray[pos] === 'object' && !(isObjectEmpty(myarray[pos]))){
        let data = myarray[pos];
        for (var property in data) {
            if (data.hasOwnProperty(property)) {
                if (isPrimitive(data[property]))
                    resultObj[property] = data[property];
                else 
                    if (Array.isArray(data[property])){
                        hasPropArray = true;
                        // First recursive call to process a property array.
                        output.push(...TraverseRecursiveArray(data[property], posSubArray++, resultObj)); 
                    };
            };
        };
        
        if (!hasPropArray)
        output.push(Object.assign({},obj,resultObj));
    }
    
    if (pos < myarray.length-1)
        //Second recursive call to process next item in current array.
        output.push(...TraverseRecursiveArray(myarray,pos+1, obj));
    
    return output;    
};