Split String in Half By Word

Question

I\'m in a situation where I\'d like to take a string and split it in half, respecting words so that this string here doesn\'t get split into this str

Answer 1

I wanted to leave this as a comment but do not have enough rep points. The top solution right now fails pretty easily because it does not check for "-1" when using the indexOf method. See this fiddle:

http://jsfiddle.net/7RNBu/7/

var s = "This is a long strinjjjjjjjjjjjjjjjjg";
var middle = Math.floor(s.length / 2);
var before = s.lastIndexOf(' ', middle);
var after = s.indexOf(' ', middle + 1);

if (middle - before < after - middle) {
    middle = before;
} else {
    middle = after;
}

var s1 = s.substr(0, middle);
var s2 = s.substr(middle + 1);