@stylistic/stylelint-plugin/lib/utils/hasEmptyLine/index.js

A collection of stylistic/formatting Stylelint rules

const HAS_EMPTY_LINE = /\n[\r\t ]*\n/

/**
 * Check if a string contains at least one empty line
 *
 * @param {string | undefined} string
 * @returns {boolean}
 */
export function hasEmptyLine (string) {
	if (string === `` || string === undefined) { return false }

	return HAS_EMPTY_LINE.test(string)
}