Eslint No-unused-var用于装饰工厂

Question

Thanks for browsing my question.
I met some eslint errors after using decorator like this

@decorate({ title: 'head' })
class Test {
  @decorate(item => ({ age: item.age }))
  method(){
    return ;
  }
}
export default Test;

.eslintrc config :

{
  "parser": "babel-eslint",
  "rules": {
    "no-unused-vars": 2
  }
}

pacakges version

"babel-eslint": "6.0.3",
"eslint": "^2.8.0"

eslint error message

Cannot read property 'type' of undefined
TypeError: Cannot read property 'type' of undefined
  at collectUnusedVariables (/Users/Documents/support_decorator/node_modules/eslint/lib/rules/no-unused-vars.js:184:44)

Looks like this line causes problem. And used ES5 common anonymous function, errors still exist.

@decorate(item => ({ age: item.age })) 

What should i do? Upgrade eslint and babel-eslint to specific version or just close "no-unused-vars" rule?

Answer 1

eslint v6.0.4中已修复此问题 ，只需升级即可。