eslint-plugin-de-morgan/dist/utils/is-negated.js

ESLint plugin for transforming negated boolean expressions via De Morgan’s laws

import { hasNegationOperator } from './has-negation-operator.js'
/**
 * Checks whether the given AST node is a negated expression.
 *
 * @param node - The AST node to check.
 * @returns True if the node is a UnaryExpression with operator `!`.
 */
function isNegated(node) {
  return (
    hasNegationOperator(node) &&
    !hasNegationOperator(node.argument) &&
    (!node.parent || !hasNegationOperator(node.parent))
  )
}
export { isNegated }