switch-case-braces.md

switch-case-braces

📝 Enforce consistent brace style for case clauses.

💼🚫 This rule is enabled in the ✅ recommended config. This rule is disabled in the ☑️ unopinionated config.

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

1. Forbid braces for empty clauses.
2. Enforce braces for non-empty clauses.

Examples

// ❌
switch (foo) {
	case 1: {
	}
	case 2: {
		doSomething();
		break;
	}
}

// ✅
switch (foo) {
	case 1:
	case 2: {
		doSomething();
		break;
	}
}

// ❌
switch (foo) {
	case 1:
		doSomething();
		break;
}

// ✅
switch (foo) {
	case 1: {
		doSomething();
		break;
	}
}

Options

Type: string
Default: 'always'

• 'always' (default)
  • Always report when clause is not a BlockStatement.
• 'avoid'
  • Only allow braces when there are variable declaration or function declaration which requires a scope.

The following cases are considered valid:

/* eslint unicorn/switch-case-braces: ["error", "avoid"] */
switch (foo) {
	case 1:
		doSomething();
		break;
}

/* eslint unicorn/switch-case-braces: ["error", "avoid"] */
switch (foo) {
	case 1: {
		const bar = 2;
		doSomething(bar);
		break;
	}
}

The following case is considered invalid:

/* eslint unicorn/switch-case-braces: ["error", "avoid"] */
switch (foo) {
	case 1: {
		doSomething();
		break;
	}
}