order preserving javascript JSON serde via giving and passing Map

lib.rs

use serde_json::Value;
use serde_wasm_bindgen;
use wasm_bindgen::prelude::*;

#[wasm_bindgen]
pub fn parse_json(string: JsValue) -> Result<JsValue, JsValue> {
  let string: String = string
    .as_string()
    .ok_or_else(|| JsValue::from_str("Expected a string"))?;

  let string: Value = serde_json::from_str(&string)
    .map_err(|e| JsValue::from_str(&format!("Failed to parse JSON: {}", e)))?;

  let js_value = serde_wasm_bindgen::to_value(&string).map_err(|e| {
    JsValue::from_str(&format!("Failed to serialize to JsValue: {e}"))
  })?;

  Ok(js_value)
}

#[wasm_bindgen]
pub fn stringify_json(value: JsValue) -> Result<JsValue, JsValue> {
  let value: Value = serde_wasm_bindgen::from_value(value)
    .map_err(|e| JsValue::from_str(&format!("Failed to deserialize from JsValue: {e}")))?;

  let string = serde_json::to_string_pretty(&value)
    .map_err(|e| JsValue::from_str(&format!("Failed to serialize to JSON: {e}")))?;

  Ok(JsValue::from_str(&string))
}