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node-course/node_modules/eslint/lib/rules/utils/unicode/is-combining-character.js

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+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+"use strict";
+
+/**
+ * Check whether a given character is a combining mark or not.
+ * @param {number} codePoint The character code to check.
+ * @returns {boolean} `true` if the character has the General Category of Combining Mark (M), consisting of `Mc`, `Me`, and `Mn`.
+ */
+module.exports = function isCombiningCharacter(codePoint) {
+	return /^\p{M}$/u.test(String.fromCodePoint(codePoint));
+};