How to use forEach on inline array when using typescript?

I am doing something like the below in my TS project:

['components.d.ts', '.eslintrc.js'].forEach(fileName => {
  console.log(fileName)
})

This is valid JS code and TS should infer fileName as string and allow me to loop over it. However, I am getting error saying:

Element implicitly has an 'any' type because expression of type '".eslintrc.js"' can't be used to index type 'void'.
  Property '.eslintrc.js' does not exist on type 'void'

Unsafe call of an `any` typed value. eslint(@typescript-eslint/no-unsafe-call)

Left side of comma operator is unused and has no side effects. ts(2695)

My tsconfig:

{
    "compilerOptions": {

        "target": "ESNext",
        "module": "ESNext",
        "moduleResolution": "node",
        "baseUrl": "./",
        "paths": {
            "@/*": [
                "src/*"
            ],
            "@templates/*": [
                "src/templates/*"
            ],
        },
        "resolveJsonModule": true,
        "esModuleInterop": true,
        "forceConsistentCasingInFileNames": true,
        "strict": true,
        "noImplicitAny": true,
        "strictNullChecks": true,
        "strictFunctionTypes": true,
        "strictBindCallApply": true,
        "strictPropertyInitialization": true,
        "noImplicitThis": true,
        "noFallthroughCasesInSwitch": true,
        "noImplicitOverride": true,
        "skipLibCheck": true
    },
    "exclude": [
        "./node_modules",
    ],
    "include": [
        "src/**/*"
    ]
}

Thanks

>Solution :

You probably have a method call in the previous line which doesn’t end with a ;. Something like this:

console.log()

['components.d.ts', '.eslintrc.js'].forEach(fileName => {
  console.log(fileName)
})

In this case, a semicolon is NOT inserted automatically. So, it ends up being

console.log()['components.d.ts', '.eslintrc.js']

or just

console.log()['.eslintrc.js']

because of the comma operator. This explains the error you are getting:

‘.eslintrc.js’ does not exist on type ‘void’

If you add a ; at the end of the previous line, the error should go way. Here’s a link to the TS Payground which reproduces the error

Further reading:

• ES6 Array destructuring weirdness
• What are the rules for JavaScript’s automatic semicolon insertion (ASI)?