String.prototype.capitalize = function (allWords) {
            return (allWords) ? // if all words
                this.split(' ').map(word => word.capitalize()).join(' ') : //break down phrase to words then  recursive calls until capitalizing all words
                this.charAt(0).toUpperCase() + this.slice(1); // if allWords is undefined , capitalize only the first word , mean the first char of the whole string
        }
        let string = 'lorem ipsum'.capitalize(true);