Fixing Precision Loss with Large Numbers & BigInt in JSON.parse()

## The JavaScript 64-Bit Integer Problem

In JavaScript, all numbers are double-precision floats (IEEE 754). The maximum safe integer is `Number.MAX_SAFE_INTEGER` (`9007199254740991` or `2^53 - 1`).

When a database or microservice (written in Java, Go, or Rust) returns a 64-bit integer ID like `9223372036854775807`, standard `JSON.parse()` silently rounds the last digits:

const raw = '{"id": 9223372036854775807}';
console.log(JSON.parse(raw).id); 
// Output: 9223372036854776000 (WRONG ID due to float precision loss!)

Solution 1: Return 64-bit IDs as Strings from API

The cleanest industry fix is to format 64-bit database IDs as strings in your backend API JSON responses:

{
  "id": "9223372036854775807"
}

Solution 2: Use json-bigint Parser Library

If you cannot alter the backend API source code, use `json-bigint` in Node.js:

const parsed = JSONbig.parse('{"id": 9223372036854775807}'); console.log(parsed.id); // "9223372036854775807" (Preserved string!) ```

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