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no-expression-empty-lines

Disallow blank lines inside expression statements.

Targeted pattern scope​

This rule inspects ExpressionStatement nodes and checks the expression’s raw source text for blank lines.

It only applies to expression statements and does not inspect declarations, blocks, or other statement kinds.

What this rule reports​

This rule reports expression statements whose inner source text contains empty lines and auto-fixes by removing those empty lines.

Why this rule exists​

Blank lines inside a single expression usually come from accidental edits and make statement boundaries harder to read. Normalizing these expressions reduces formatting noise.

❌ Incorrect​

someCall(

    1);

✅ Correct​

someCall(1);

Behavior and migration notes​

This rule is autofixable.

The fixer removes blank lines inside the expression, trims trailing spaces on each line, and rewrites the statement with a terminating semicolon.

Options​

This rule has no options.

Additional examples​

doWork(
 value,

 nextValue
);
// ❌ reported

doWork(value, nextValue);
// ✅ valid

ESLint flat config example​

import etcMisc from "eslint-plugin-etc-misc";

export default [
 {
  plugins: { "etc-misc": etcMisc },
  rules: {
   "etc-misc/no-expression-empty-lines": "error",
  },
 },
];

When not to use it​

Disable this rule if blank lines inside expressions are allowed for readability.

Package documentation​

Rule catalog ID: R024

Further reading​

Adoption resources​

  • Start at warning level in CI, then move to error after cleanup.
  • Use focused codemods/autofix batches per package or directory.