Get rid of 'is defined but never used' in function parameter

Question

I am getting the error/warning from ESLint that 'd' is declared but never used, however I need this type declaration in function parameter to avoid subsequent TypeScript errors. Is there a way of solving this problem/warning except changing the rules in .eslintrc.json file for no-unused-vars?

Answer 1

In your .eslintrc.json add "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }] to "rules". Mine looks like this:

...
"rules": {
        "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
        "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
    },
...

Now you should be able to add an underscore to the start of your variable declarations and it should avoid the error message.

Ex:

const myFunc = (c, b) => {} would be const myFunc = (_c, _b) => {}

You can also take a look ate argsignorepattern in the ESLint documentation.

---

I believe if you are using the typescript you might also have to add "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }]"

Answer 2

i think this is the shortest answer

//.eslintrc.json

...
"rules": {
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": "error",
  },
...