space-before-function-paren.md

Enforces consistent spacing before function parenthesis (space-before-function-paren)

When formatting a function, whitespace is allowed between the function name or function keyword and the opening parenthesis. Named functions also require a space between the function keyword and the function name, but anonymous functions require no whitespace. For example:

function withoutSpace(x) {
  // ...
}

function withSpace (x) {
  // ...
}

var anonymousWithoutSpace = function() {};

var anonymousWithSpace = function () {};

Style guides may require a space after the function keyword for anonymous functions, while others specify no whitespace. Similarly, the space after a function name may or may not be required.

Rule Details

This rule extends the base eslint/space-before-function-paren rule. It supports all options and features of the base rule. This version adds support for generic type parameters on function calls.

How to use

{
  // note you must disable the base rule as it can report incorrect errors
  "space-before-function-paren": "off",
  "@typescript-eslint/space-before-function-paren": ["error"]
}

Options

See eslint/space-before-function-paren options.

^{Taken with ❤️ from ESLint core}