jsx-curly-newline.md

Enforce consistent linebreaks in curly braces in JSX attributes and expressions (react/jsx-curly-newline)

🔧 This rule is automatically fixable by the --fix CLI option.

Many style guides require or disallow newlines inside of jsx curly expressions.

Rule Details

This rule enforces consistent linebreaks inside of curlies of jsx curly expressions.

Rule Options

This rule accepts either an object option:

{
  multiline: "consistent" | "forbid" | "require", // default to 'consistent'
  singleline: "consistent" | "forbid" | "require", // default to 'consistent'
}

Option multiline takes effect when the jsx expression inside the curlies occupies multiple lines.

Option singleline takes effect when the jsx expression inside the curlies occupies a single line.

• consistent enforces either both curly braces have a line break directly inside them, or no line breaks are present.
• forbid disallows linebreaks directly inside curly braces.
• require enforces the presence of linebreaks directly inside curlies.

or a string option:

• consistent (default) is an alias for { multiline: "consistent", singleline: "consistent" }.
• never is an alias for { multiline: "forbid", singleline: "forbid" }

or an

consistent (default)

Examples of incorrect code for this rule, when configured with consistent or { multiline: "consistent", singleline: "consistent" }:

<div>
  { foo
  }
</div>

<div>
  {
    foo }
</div>

<div>
  { foo &&
    foo.bar
  }
</div>

Examples of correct code for this rule:

<div>
  { foo }
</div>

<div>
  {
    foo
  }
</div>

never

Examples of incorrect code for this rule, when configured with never or { multiline: "forbid", singleline: "forbid" }:

<div>
  {
    foo &&
    foo.bar
  }
</div>

<div>
  {
    foo
  }
</div>

<div>
  { foo
  }
</div>

Examples of correct code for this rule:

<div>
  { foo &&
    foo.bar }
</div>

<div>
  { foo }
</div>

require

Examples of incorrect code for this rule, when configured with { multiline: "require", singleline: "require" }:

<div>
  { foo &&
    foo.bar }
</div>

<div>
  { foo }
</div>

<div>
  { foo
  }
</div>

Examples of correct code for this rule:

<div>
  {
    foo &&
    foo.bar
  }
</div>

<div>
  {
    foo
  }
</div>

When Not To Use It

You can turn this rule off if you are not concerned with the consistency of padding linebreaks inside of JSX attributes or expressions.