Title Case a Sentence

Hello,

So I'm beginning to understand things a little bit more! :sparkles:

This one is beginning to annoy me though. It's just returning "I'm a little tea pot" which is about as annoying as when you order a pot of tea and it has just one cup's worth in it. :tea:

Thanks in advance!

**QUESTION**

Return the provided string with the first letter of each word capitalized. Make sure the rest of the word is in lower case.

For the purpose of this exercise, you should also capitalize connecting words like "the" and "of".

Remember to use Read-Search-Ask if you get stuck. Write your own code.

**MY CODE**

```

function toUpperCase(str) {

str = str.toLowerCase().split(" ");

for (var i = 0; i < str.length; i++) {
str[i] = str[i].charAt(0).toUpperCase() + str[i].slice(1);

return str.join (" ");
}
}

titleCase("I'm a little tea pot");
```

Start with the titleCase function and example string in the issue body, comparing the current output with the stated title-casing requirements. Verify that the completed behavior capitalizes every word, including connecting words, while lowercasing the remaining letters.

索引モデルが issue の本文から書いたものです。