nice-space-before-function-paren.md

nice-space-before-function-paren

The rule nice-space-before-function-paren enforces consistent spacing before the opening parenthesis in a function definition.

This is similar to using the predefined rule space-before-function-paren with settings ["error", { anonymous: "always", named: "never", asyncArrow: "always" }]. The main difference lies in the way line breaks are treated. While the predefined rule space-before-function-paren considers line breaks as regular spacing characters, and disallows them before the opening parenthesis in a regular named function definition, the Origin₁ rule nice-space-before-function-paren always allows newlines, also when they are surrounded by regular whitespaces.

Examples

Examples of incorrect code for this rule

/* eslint @origin-1/nice-space-before-function-paren: "error" */

function foo ()
{
    // ...
}

var bar =
function()
{
    // ...
};

class Foo
{
    constructor ()
    {
        // ...
    }
}

var foo =
{
    bar ()
    {
        // ...
    }
};

var foo = async(a) => await a

Examples of correct code for this rule

/* eslint @origin-1/nice-space-before-function-paren: "error" */

function foo(arg1, arg2)
{
    // ...
}

function foo2
(arg1, arg2)
{
    // ...
}

var bar =
function ()
{
    // ...
};

class Foo
{
    constructor()
    {
        // ...
    }
}

class Foo2
{
    constructor
    ()
    {
        // ...
    }
}

var foo =
{
    bar()
    {
        // ...
    }
};

var foo2 =
{
    bar
    ()
    {
        // ...
    }
};

var foo = async (a) => await a

Superseded core ESLint rules

• space-before-function-paren