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Vue resource plugin to convert request json keys to snake_case and response json keys to camelCase
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Module attaches interceptors to vue instance which process request and responses to convert keys on JSON objects to camelCase for responses and snake_case for requests.

Your vue instance should have vue-resource plugin installed and connected.


Very often popular backends use snake case as their default code style, while camel case is usually used in javascript.

This module can be used to keep consistent code style on both backend and your vue frontend.


$ npm i vue-resource-case-converter

Then in your code:

const Vue = require('vue');
const VueResource = require('vue-resource');
const VueResourceCaseConverter = require('vue-resource-case-converter');


If you are still using older version of vue-resource (0.*) then use 1.* version of case converter.

Version 2.* does not work with 0.* version of vue-resource, because it has some breaking changes.


A number of configuration options are supported, which can be set either globally or on a URL-by-URL basis.

  • convert (boolean): Whether to convert JSON keys between cases. Defaults to true.
  • underscoreNumbers (boolean): Whether to treat numbers as the start of a new word within the key. For example, if true, fooBar2 converts to foo_bar_2; otherwise, fooBar2 converts to foo_bar2. Defaults to false.
  • responseUrlFilter (function): If provided, customizes behavior by URL. The function takes a URL as the first argument, and should return either a boolean or an object. A boolean indicates simply whether or not to make case conversions, and allows you to turn off case conversion for particular APIs or URLs. An object return value should mirror the global options and allows you to override convert and underscoreNumbers on a URL basis. Defaults to null.
  • requestUrlFilter (function): Same as responseUrlFilter, but for resquests.

For example:

Vue.use(VueResourceCaseConverter, {
  convert: false,  // e.g., to turn off by default, and enable by URL
  underscoreNumbers: false,
  responseUrlFilter(url) {
    if (/api\/v2/.test(url)) {
      return {
        convert: true
  requestUrlFilter(url) {
    if (/api\/v2/.test(url)) {
      return {
        convert: true


This plugin was inspired by this angular.js version.

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