Error with eslint@2.3.0: Cannot find module 'estraverse-fb'

[ryym]

### [Edit by hzoo] - if you are experiencing this error, pin to ESLint 2.2.2.

babel-eslint@5.x.x is for mainly for eslint 1, which is why there's a babel-eslint@6 beta for ESLint 2.

[Edit by hzoo]: If you are using ESLint 2, use babel-eslint@6.x.x

---

Hi,

When I use babel-eslint with eslint@2.3.0, the following error is thrown. But when I use eslint@2.2.0, the error doesn't occur.

Error: Cannot find module 'estraverse-fb'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)

I created a sample repository to reproduce this error. To reproduce, please checkout this repository and run npm install && npm test.

Environment:

• babel-eslint@5.0.0
• eslint@2.3.0

[unindented]

Related: eslint/eslint#5476

[hzoo]

ESLint@2.3.0 removed estraverse-fb and also changed how VisitorKeys are used, which babel-eslint patches to support flow, etc so we'll need to wait for an update.

For now, you'll have to pin to 2.2.x

[hzoo]

Going to just error "Pin to ESLint 2.2.2" so the error is clearer, until this is fixed.

https://github.com/babel/babel-eslint/releases/tag/v6.0.0-beta.5

[aegyed91]

Instead of installing an older eslint version you can just npm i --save-dev estraverse-fb and remove it once the issue fixed.

[hzoo]

@tsm91 I don't recommend installing estraverse-fb because that just masks other potential errors. You should either stick with an older eslint version or just update to the latest babel-eslint

[hzoo]

@zerkms Ok I think i'l release a patch for babel-eslint@5 to use eslint 1.

[aegyed91]

@hzoo i havent noticed any, yet

[hzoo]

If it works for you then great; but I remember finding issues - although it's the nature of the tool (depends on the rules you use and the code you write)

[hzoo]

Ok went ahead and made babel-eslint@5.0.1 to have a ESLint 1 peerDependency, and I moved babel-eslint@6 out of beta for ESLint 2!

[aegyed91]

with these rules it works

in my case it broke with an older version, because of an airbnb/base arrow function related rule

[whatevernot]

FWIW, I ran into the "Cannot find module 'estraverse-fb'" issue in a project I'm working on. Change to:

devDependencies:
"babel-eslint": "^4.1.8" --->
"babel-eslint": "^6.0.0"

did the trick for me.