Javascript Object Iteration with for loop

You wrote:

 wordObj[c]=+1;

With some formatting:

 wordObj[c] = +1;

You always assign +1 to the value, there is no increment here. Try

 wordObj[c] = (wordObj[c] || 0)+1;

And

var wordArray = word.split([, ]);

should be rather

var wordArray = word.split("");

function allUniqueCha(word) {
  var wordObj = {};
  var wordArray = word.split("");
  wordArray.forEach(function(c) {
    wordObj[c] = (wordObj[c] || 0) +1;
  });
  console.log(wordArray);
  console.log(wordObj);
}

allUniqueCha("Bubble")

When you do:

wordObj[c] = +1;

you are assigning the value +1 to the property. What you want to do is increment the value by 1, so:

wordObj[c] += 1;

However, initially wordObj[c] doesn't exist so you're trying to increment undefined, which will throw an error. So yo must test if the property exists and if not, create it an initialise it.

function allUniqueCha(word) {
  var wordObj = {};
  var wordArray = word.split([, ]);
  wordArray.forEach(function(c) {
    if (!wordObj.hasOwnProperty(c)){
      wordObj[c] = 0;
    }
    wordObj[c] += 1;
  });
  console.log(wordArray);
  console.log(wordObj);
}

allUniqueCha("Bubble")

You could also use reduce:

function allUniqueCha(word) {
  return word.split('').reduce(function(acc, c) {
    acc[c] = (acc[c] || 0) + 1;
    return acc;
  },{});
}

console.log(allUniqueCha("Bubble"));

This piggy backs on the train of thought in your initial post. Here is one way to solve the problem you are looking for.

function allUniqueCha(word){
  let wordArray = word.split([,]);
  return wordArray.reduce((result, element) => {
    result[element] = result[element] + 1 || 1;
    return result;
  }, {})
}