Capitalize first letter of sentences CSS

Question

I want to capitalize the first letter of sentences, and also the first letter after commas if possible. I want to add the code in here:

Answer 1

If you need to capitalize the first letter in contenteditable container you can't use the css property

#myContentEditableDiv:first-letter {
    text-transform: capitalize;
}

because when you try to delete a letter automatically you will delete all the text contained in the contenteditable.

Try instead the example provided by sakhunzai in https://stackoverflow.com/a/7242079/6411398 for a working solution.