ɔ̃ does not exist in JavaScript

Question

I was doing a simple program in JS to get a list of keyCodes for all french phoneme symbols in the International Phonetic Alphabet, and I realised that key like ɔ̃ are actually considered as ɔ and ~.

My code:

var s = "iuyaɑãoɔɔ̃eεɛ̃øœœ̃əfvszʃʒlrpbmtdnkgɲjwɲ"
for (let i = 0; i < s.length; i++) {
    console.log(s.charCodeAt(i))
}
console.log(s.length)

The excpected output is a list of keycodes for each of the characters in the String. So is there any charset that has tilde accents in it?

Answer 1

It really doesn't seem like there really is a way to have a character ɔ̃ without any library... One simple solution will be to simply check to next character if there ever is a ɔ, and if it is a ~, then I will know this means ɔ̃. Thanks everyone for the answers and comments!