Title Case a Sentence Not Working

Tell us what’s happening:

How am I able to concatenate the words together?
It’s being individually lined.

Your code so far

function titleCase(str) {
    let myStr = str.toLowerCase().split(' ');
    let newStr = '';

    for(var x = 0; x < myStr.length; x++){
        newStr = myStr[x].charAt(0).toUpperCase() + myStr[x].slice(1);
    return newStr;

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

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User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36.

Link to the challenge:

You should look into the join method.

Also realize that your variable myStr is not a string, it’s an array of strings. I would advise making changes to each of those strings in the array - in the for loop. Then, after the for loop, you can join and return it.