Create javascript API object by giving the paths to the value without creating object

namespaced-api-creator.js

/**
 * 
 * @param obj Target object
 * @param pathToFunc path string e.g. "foo.bar.baz"
 * @param value value to place at this path
 */
function addFunction(obj, pathToFunc, value) {
    const properties = pathToFunc.split('.');
    
    function addProperty(obj, i=0) {
        const isLastProperty = i+1 === properties.length;
        const currentProperty = properties[i];

        if(!isLastProperty) {
            let nextObj = obj[currentProperty];
            if(!nextObj) {
                nextObj = {}
                obj[currentProperty] = nextObj;
            }
            addProperty(nextObj, i+1);
        }
        else {
            obj[currentProperty] = value;
        }
    }
    addProperty(obj);
}

const api = {};
addFunction(api, 'my.nice.api.doStuff', () => console.log('woohoo!'));
addFunction(api, 'my.nice.api.doMoreStuff', () => console.log('woohoo! ...again!'));
addFunction(api, 'my.nice.api.doEvenMoreStuff', () => console.log('even more woohoo!'));

api.my.nice.api.doStuff();
api.my.nice.api.doMoreStuff();
api.my.nice.api.doEvenMoreStuff();