Can't overwrite "strict" rule

I have the following files:

// foo.js
function foo() {
  return 42;
}

foo();

---
extends: airbnb/base
rules:
  strict: [2, "global"]

Running eslint foo.js returns successfully, even though foo.js has no "use strict"; directive. If I change to extends: eslint:recommended, it complains because of the lack of "use strict"; (as expected).

I tried to overwrite another rule, so I changed the files to:

// foo.js
function foo() {
  return 42;
}

// Remove the call to foo();
// foo();

---
extends: airbnb/base
rules:
  no-unused-vars: 0

And it worked. I was able to overwrite no-unused-vars.

I’m running eslint@1.10.3 and eslint-config-airbnb@5.0.0 with Node v5.5.0 and npm v3.6.0.

[Starefossen]

Sorry for this way to late reply 😦

The problem I had was to force the use of "use strict"; using the "strict": [2, "global"] rule. This did not have any effect and ESLint said that "use strict"; was not necessary when using ES6 modules.

However this was in a Node.js project and my models are not ES6 modules and I wanted them all to have strict mode enabled and I was able to force it by setting "sourceType": "script" in parserOptions like this:

{                                                                    
    "extends": "airbnb-base",                                        
    "env": {                                                         
      "node": true                                                   
    },                                                               
    "parserOptions": {                                               
      "ecmaVersion": 6,                                              
      "sourceType": "script",                                        
      "ecmaFeatures": {                                              
        "modules": false                                             
      }                                                              
    },                                                               
    "rules": {                                                       
      "strict": [2, "global"]
    }                                                                
}                                                                    

[blakedietz]

@Starefossen you’re solution works. I had the exact same use case for linting an AWS Lambda project. Thanks!