Registry / devops / axios-case-converter

axios-case-converter

library1.1.1jsnpmunverified

Axios middleware that automatically transforms object keys between snake_case and camelCase in HTTP requests and responses. Current stable version is 1.1.1. It uses Axios interceptors to convert outgoing request data, params, and headers to snake_case/Header-Case, and incoming response data and headers back to camelCase. Built on top of the 'change-case' library. Requires Axios >=1.0.0 as a peer dependency. Differentiates from similar libraries by also handling URL params and headers, and offering fine-grained options like preservedKeys, ignoreHeaders, and caseFunctions for overriding transformation behavior. Ships TypeScript declarations.

devops

npm install axios-case-converter

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · AXIOS-CASE-CONVERT

axios-case-converter

devopsjavascriptv1.1.1

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

applyCaseMiddleware

✓ import applyCaseMiddleware from 'axios-case-converter'

✗ const applyCaseMiddleware = require('axios-case-converter')

Package ships both ESM and CJS; default export only. Use named import only if using TypeScript with esModuleInterop.

applyCaseMiddleware (default)

✓ import applyCaseMiddleware from 'axios-case-converter'

✗ import { applyCaseMiddleware } from 'axios-case-converter'

The function is a default export, not a named export. Named import will result in undefined.

TypeScript types

✓ import type { Options } from 'axios-case-converter'

✗ import { Options } from 'axios-case-converter'

Options type is exported as an interface; use type import to avoid runtime inclusion.

Creates an Axios instance with automatic camelCase/snake_case conversion for requests and responses.

import applyCaseMiddleware from 'axios-case-converter'; import axios from 'axios'; // Create axios instance with case conversion const client = applyCaseMiddleware(axios.create({ baseURL: 'https://api.example.com' })); async function fetchData() { try { const { data } = await client.post('/users', { fullName: 'John Doe', emailAddress: 'john@example.com' }); // outgoing: { full_name: 'John Doe', email_address: 'john@example.com' } // incoming response keys become camelCase console.log(data); } catch (error) { console.error(error); } } fetchData();

Debug

Known issues

breakingVersion 1.x requires Axios >=1.0.0; version 0.x required Axios <=0.27.x.

fix

Upgrade axios to version >=1.0.0 and <2.0.0.

affects: >=1.0.0

deprecatedInternet Explorer polyfills for Object.entries and FormData.entries may not be needed in modern environments.

fix

Polyfill only if targeting IE. For modern browsers, no action needed.

affects: >=0.0.0

gotchaFunction passed to preservedKeys receives the snake_case key, not the camelCase key.

fix

Check against snake_case strings when using preservedKeys as a function.

affects: >=0.0.0

gotchaHeaders are converted to Header-Case (e.g., user-agent -> User-Agent) but incoming headers are converted back to camelCase. This may conflict with custom headers.

fix

Set ignoreHeaders: true if you need to preserve header casing.

affects: >=0.0.0

deprecatedThe caseOptions.stripRegexp default includes '[]' characters; this is non-standard and may cause unexpected transformations.

fix

Override caseOptions.stripRegexp to match standard change-case behavior if needed.

affects: >=0.0.0

Errors

Common errors & fixes

TypeError: applyCaseMiddleware is not a function

Named import instead of default import

fix

Use: import applyCaseMiddleware from 'axios-case-converter'

Error: Cannot find module 'axios'

Axios is a peer dependency and not installed.

fix

Run: npm install axios

Upgrade

Version history

1.1.1latest on npm

Audit

Dependencies

axiosrequiredpeer dependency; the library wraps an Axios instance

Agent activity

7 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/mpyw/axios-interceptor-change-case ↗

packageaxios-case-converter ↗

homepagehttps://github.com/mpyw/axios-interceptor-change-case#readme ↗