How to make JavaScript ignore escape characters in object's field

Question

The javascript file that would be imported:

let objek = {
    "subjek": "10mat",
    "10mat1": {
        "id": "10mat1",
        "noPertanyaan": 1,
        "pertanyaan": "",
        "jawaban": {
            "a": "$ b - a < x - y < a - b  $",
            "b": "$ a - b < x - y < b - a  $",
            "c": "$ \frac {1}{2}\\ (b-a) < x - y < \frac {1}{2}\\ (a-b) $",
            "d": "$ \frac {1}{2}\\ (a-b) < x - y < \frac {1}{2}\\ (b-a) $"
        },
        "kunci": "c"
    },
    "10mat2": {
        "id": "10mat2",
        "noPertanyaan": 2,
        "pertanyaan": "",
        "jawaban": {
            "a": "$ 2 [\leq x \leq 3 $",
            "b": "$ -1 \leq x \leq 2 $",
            "c": "$ x \leq{2}\ \text{atau}\ x \geq{3}\ $",
            "d": "$ x \leq{-1}\ \text{atau}\ x \geq{2}\ $"
        },
        "kunci": "e"
    }
}

module.exports = objek

When I import this file, and I JSON.stringify and JSON.parse it, $ -1 \leq x \leq 2 $ becomes $ -1 leq x leq 2 $ , how can I fix this / make the JSON parser ignore the escape characters intended for a TeX syntax?

I tried to turn \ into \\ and also tried using .raw but both don't work. I used a JS file instead of JSON because JSON wouldn't accept invalid escape characters but JS does, at least its what it seems. Like I said above, it simply ruins the TeX syntax when it's imported, even before it gets stringified and parsed.

I'm trying to write mathematical equations with MathJax so that it wouldn't be hard to display TeX on HTML, but as it turns out, I'm bombarded by problems on escape characters instead.

Doesn't work. Can you elaborate on how you managed to get it working? — Andre Christoga Pramaditya, Apr 30 '20 at 05:24
OK, take a look at this https://codepen.io/magicjack/pen/dyYzqqW?editors=0111 — Jack Ting, Apr 30 '20 at 06:32
I checked the codepen and it did work. Though I then tried to replicate it in my code (nodejs) and it doesn't work. Any idea on how one could fix this in NodeJS? Thanks tho — Andre Christoga Pramaditya, Apr 30 '20 at 07:29
Do you have read this? https://stackoverflow.com/questions/22465978/how-to-escape-characters-in-nodejs — Jack Ting, Apr 30 '20 at 08:02
Hi again, yeah I've read the stackoverflow entry you've commented but it didn't help. I'm not sure where I can put a sandbox of NodeJS so I put it in a gist instead (https://gist.github.com/drepram/54592e976f51aa6d9cfd3f65ac8bce10). Right now I'm thinking about letting it be a \\ and just parsing at FE, but perhaps there's a better way? — Andre Christoga Pramaditya, May 02 '20 at 06:51
I built one on "repl.it" https://repl.it/@MagicJack/Escape-Character, and that is still right for what I had recommended. — Jack Ting, May 03 '20 at 17:53

How to make JavaScript ignore escape characters in object's field

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