word to proper case js code example

Example: javascript string proper case

function toTitleCase(str) {
  return str.replace(
    /\w\S*/g,
    function(txt) {
      return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    }
  );
}
// example
toTitleCase("the pains and gains of self study");
// "The Pains And Gains Of Self Study"