How to define Titlecase using regex in Javascript?

Question

I have this Function:

 var titleCase = function(s) {
         return s.replace(/(\w)(\w*)/g, function(g0, g1, g2) {
              return g1.toUpperCase() + g2.toLowerCase();
         });
    }

If I call her by passing something she works right:

var teste = titleCase("apenas um teste"), //"Apenas Um Teste"
    teste2 = titleCase("oUTRO.tesTE");     //"Outro.Teste"

But when I have an upperChar in the middle of the text, it should keep it, but instead is ignoring it:

var teste3 = titleCase('testeControl'); //"Testecontrol"

Any suggestions for me to have on teste3 the result "TesteControl"?

It doesn’t matter if you break the teste2.

Answer 1

Just replace g2.toLowerCase() by just g2, so that there is no passage into the lower case characters of those in the middle of the word:

var titleCase = function(s) {
         return s.replace(/(\w)(\w*)/g, function(g0, g1, g2) {
              return g1.toUpperCase() + g2;
         });
    }

But as you said yourself, teste2 will no longer stick with the lowercase middle characters, thus getting broken.

jsfiddle of example