no‐number

Avoid using numbers at the end of variable or function names.

Rule Details

Examples of incorrect code for this rule:

const foo1 = 1;
const bar2 = 2;

function baz3() {
  return 3;
}

Examples of correct code for this rule:

const foo = 1;
const bar = 2;

function baz() {
  return 3;
}

Options

You can pass an allow option to specify a list of variable or function names that are allowed to have numbers at the end. By default, the rule allows s3 and v4 as they are common in the JavaScript world. (e.g. s3 for AWS S3, v4 for UUID v4)

{
  "clean-code/no-number": ["error", {
    "allow": ["s3", "v4"]
  }]
}

You can pass an allowRegex option to specify a list of regular expressions that are allowed to have numbers at the end.

{
  "clean-code/no-number": [
    "error",
    {
      "allowRegex": [
        "^foo[0-9]+$",
        "S3$"
      ]
    }
  ]
}

You can pass an extensions option to specify a list of file extensions that will be checked. By default, the rule checks .js, .jsx, .ts, and .tsx files.

{
  "clean-code/no-number": ["error", {
    "extensions": [".js", ".jsx", ".ts", ".tsx"]
  }]
}