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best-effort-json-parser	90,239	236	47.6 kB	2	23 days ago	BSD-2-Clause

best-effort-json-parser

Parse incomplete JSON text in best-effort manner. Useful for partial JSON responses, broken network packages, or LLM responses exceeding tokens.

Minified Package Size Minified and Gzipped Package Size npm Package Downloads

Features

Typescript support
Isomorphic package: works in Node.js and browsers

Installation

npm install best-effort-json-parser

You can also install best-effort-json-parser with pnpm, yarn, or slnpm

Usage Example

import { parse } from 'best-effort-json-parser'

let data = parse(`[1, 2, {"a": "apple`)
console.log(data) // [1, 2, { a: 'apple' }]

Error Logging

By default, the parser logs errors to console.error. You can control error logging behavior:

import {
  disableErrorLogging,
  enableErrorLogging,
  setErrorLogger,
} from 'best-effort-json-parser'

// Disable error logging completely
disableErrorLogging()

// Re-enable error logging (default behavior)
enableErrorLogging()

// Set a custom error logger
setErrorLogger((message, data) => {
  // Your custom logging logic here
  console.log('Custom error:', message, data)

  // Common destinations for error data:
  // - Database storage for analysis
  // - File system logging
  // - Third-party services (Sentry, LogRocket, etc.)
  // - Monitoring and alerting systems
})

Typescript Signature

// Main parse function
function parse(s: string | undefined | null): any

// Parse namespace with additional properties
namespace parse {
  lastParseReminding: string | undefined
  onExtraToken: (text: string, data: any, reminding: string) => void | undefined
}

// Error logging functions
function setErrorLogger(logger: (message: string, data?: any) => void): void
function disableErrorLogging(): void
function enableErrorLogging(): void

More examples see parse.spec.ts

License

This is free and open-source software (FOSS) with BSD-2-Clause License