var result;
var strLength = str.length;
var strHalf = Math.floor(strLength / 2);
var strStart;
var strEnd = strHalf + 1;
if (strLength % 2 === 0) {
strStart = strHalf - 1;
result = str.substring(strStart, strEnd);
} else if (strLength % 2 === 1) {
strStart = strHalf;
result = str.substring(strStart, strEnd);
}
var log = {
str: str,
strLength: strLength,
strStart: strStart,
strHalf: strHalf,
strEnd: strEnd,
halfText: result
};
console.log(log);