TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them

Question

What does the following error mean, and how should I fix it?

$ npm test

> location-autosuggest@3.0.0 test /Users/mishamoroshko/location-autosuggest
> mocha test --compilers js:babel/register



  compareKeys()
    should return -1
      1) when first key is different


  0 passing (301ms)
  1 failing

  1) compareKeys() should return -1 when first key is different:
     TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them
      at Context.<anonymous> (compare-keys/compare-keys.test.js:3:16)

Here are the relevant parts:

compare-keys/compare-keys.test.js

1. 'use strict';
2. 
3. import { expect } from 'chai';

package.json

"scripts": {
   "test": "mocha test --compilers js:babel/register"
}

.babelrc

{
  "stage": 0
}

mocha.opts

I don't have one.

Versions

babel: 5.5.1
mocha: 2.2.5
chai: 3.0.0

Similar question stackoverflow.com/a/29130322/1909531 Here I found the solution exclude: /node_modules/ — Matthias M, Jan 10 '16 at 13:34
My answer for same question https://stackoverflow.com/a/44666529/1114926 — Green, Jun 21 '17 at 19:58

krampstudio · Answer 1 · 2015-06-05T10:54:10.253

1

Since ES5, in strict mode, you cannot use some properties of arguments like callee, etc. See for example the disclaimer on MDN on the callee page :

The 5th edition of ECMAScript (ES5) forbids use of arguments.callee() in strict mode. Avoid using arguments.callee() by either giving function expressions a name or use a function declaration where a function must call itself.

chai may use one of these properties.

edited Jun 05 '15 at 10:54

answered Jun 05 '15 at 10:47

krampstudio

3,519
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Isn't babel ignores `node_modules` by default? See: http://babeljs.io/docs/usage/require/#usage – Misha Moroshko Jun 05 '15 at 11:06
I guess it's not babel but the bundle itself that contains a top level 'use strict' and the library that use the denied property – krampstudio Jun 05 '15 at 11:30

score -2 · Answer 2 · answered Jun 05 '15 at 11:26

-2

I updated babel to 5.5.3 and it fixed the issue.

answered Jun 05 '15 at 11:26

Misha Moroshko

166,356
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I have this same problem but that didnt seem to fix it for me. I have babel@5.5.3 mocha@2.2.5 any ideas? – Mike Fielden Jun 11 '15 at 15:59

TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them

2 Answers2

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