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yield-star-spacing

Require or disallow spacing around the * in yield* expressions

🔧 Fixable

Some problems reported by this rule are automatically fixable by the --fix command line option

This rule was deprecated in ESLint v8.53.0. Please use the corresponding rule in @stylistic/eslint-plugin-js.

Rule Details

This rule enforces spacing around the * in yield* expressions.

Options

The rule takes one option, an object, which has two keys before and after having boolean values true or false.

  • before enforces spacing between the yield and the *. If true, a space is required, otherwise spaces are disallowed.

  • after enforces spacing between the * and the argument. If it is true, a space is required, otherwise spaces are disallowed.

The default is {"before": false, "after": true}.

"yield-star-spacing": ["error", {"before": true, "after": false}]

The option also has a string shorthand:

  • {"before": false, "after": true}"after"
  • {"before": true, "after": false}"before"
  • {"before": true, "after": true}"both"
  • {"before": false, "after": false}"neither"
"yield-star-spacing": ["error", "after"]

Examples

after

Examples of correct code for this rule with the default "after" option:

Open in Playground
/*eslint yield-star-spacing: ["error", "after"]*/

function* generator() {
  yield* other();
}

before

Examples of correct code for this rule with the "before" option:

Open in Playground
/*eslint yield-star-spacing: ["error", "before"]*/

function *generator() {
  yield *other();
}

both

Examples of correct code for this rule with the "both" option:

Open in Playground
/*eslint yield-star-spacing: ["error", "both"]*/

function * generator() {
  yield * other();
}

neither

Examples of correct code for this rule with the "neither" option:

Open in Playground
/*eslint yield-star-spacing: ["error", "neither"]*/

function*generator() {
  yield*other();
}

When Not To Use It

If your project will not be using generators or you are not concerned with spacing consistency, you do not need this rule.

Version

This rule was introduced in ESLint v2.0.0-alpha-1.

Further Reading

Resources

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