IsAlmostPalindromeWrong

var isAlmostPalindrome = function(s) {

const str = s.replace(/[^A-Za-z0-9]/g, '').toLowerCase();

let leftPtr = str.length - 1;

let ptrArr = new Object();

let forwardsPalindrome = true;

let boolbackwardsPalindrome = true;

for (let i = 0; i < str.length; i++) {

let char = str[i];

let backChar = str[leftPtr];

if (char !== backChar) {

ptrArr[i] = char;

ptrArr[leftPtr] = backChar;

}

leftPtr--;

}

if (JSON.stringify(ptrArr) !== '{}') {

console.log(ptrArr);

for(let prop in ptrArr) {

//console.log(prop);

leftPtr = str.length - 1;

for (let i = 0; i < str.length; i++) {

let char = str[i];

let backChar = str[leftPtr];

//console.log("Char: " + char + " Back: " + backChar)

if (char !== backChar) {

//console.log("Char: " + char + " Back: " + backChar + " I: " + i + " LeftPointer: " + leftPtr)

console.log(" I: " + i + " Prop: " + prop)

if (i == prop) {

console.log(str);

let leftPtr2 = str.length - 1;

let halfStr = Math.floor(str.length / 2);

console.log("halfStr: " + halfStr);

for (let j = 0; j < str.length; j++) {

let char2 = str[j];

let backChar2 = str[leftPtr2];

console.log("Char: " + char2 + " Back: " + backChar2 + " J: " + j + " LeftPointer: " + leftPtr2)

if (j == i) {

console.log("j == i")

char2 = str[j+1];

if (char2 !== backChar2) {

console.log(" Char: " + char2 + " BackChar: " + backChar2 + " j: " + j + " I: " + i)

//return false;

forwardsPalindrome = false;

}

} else if (leftPtr2 == i) {

console.log("Left Pointer2 == i")

backChar2 = str[leftPtr2-1];

if (char2 !== backChar2) {

console.log(" Char: " + char2 + " BackChar: " + backChar2 + " Left Pointer2: " + leftPtr2 + " I: " + i)

//return false;

backwardsPalindrome = false;

}

}

if (i == halfStr || backChar2 == halfStr) {

if (forwardsPalindrome == false && backwardsPalindrome == false) {

return false;

}

}

/**/

leftPtr2--;

}

}

}

leftPtr--;

}

//return false;

}

}

return true;

}

//console.log(isAlmostPalindrome("A man!, a plan, a canal: Panada")) //false

//console.log(isAlmostPalindrome("A man!, a plan, a canal: Panama")) //true

//console.log(isAlmostPalindrome("race a car")) //true

//console.log(isAlmostPalindrome("abccdba")) //true

//console.log(isAlmostPalindrome("abcdefdba")) //false !

//console.log(isAlmostPalindrome("")) //true

//console.log(isAlmostPalindrome("a")) //true

console.log(isAlmostPalindrome("ab")) //true