Escape json using \" in javascript

Question

I have this input {"a":["b","c","d"]}

For whatever reason, I need output like this "{\"a\":[\"b\",\"c\",\"d\"]}"

Instead of this (using JSON.stringify()) '{"a":["b","c","d"]}'

I know I can write some replacements or something. Is there any native Javascript method to do this？

where is the input coming from, why do you need to display it in json form? just escape the text (search htmlentities in js) or place it in a <pre> tag — Lawrence Cherone
– Lawrence Cherone, Commented Apr 2, 2022 at 19:08

pilchard · Accepted Answer · 2022-04-02 20:02:15Z

1

The problem with using a custom replace is that you risk making the string invalid JSON. Instead you can simply stringify it twice, which will properly escape all special characters such that it can be reliably parsed back to a valid javascript object.

const input = { 'a': ['A string with "quotes"', "c", "d"] };

const string = JSON.stringify(JSON.stringify(input));
console.log(string);

const parsed = JSON.parse(JSON.parse(string));
console.log(parsed);

answered Apr 2, 2022 at 20:02

pilchard

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user8115627 · Accepted Answer · 2022-04-02 19:24:46Z

0

Try this one

const a = {"a":["b","c","d"]}
const output = JSON.stringify(a).replaceAll('"', '\\"')
console.log(output)

Hope this helps

answered Apr 2, 2022 at 19:24

user8115627

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