Update checked-in dependencies

node_modules/eslint/lib/shared/string-utils.js

@@ -5,6 +5,26 @@
 
 "use strict";
 
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const Graphemer = require("graphemer").default;
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+// eslint-disable-next-line no-control-regex -- intentionally including control characters
+const ASCII_REGEX = /^[\u0000-\u007f]*$/u;
+
+/** @type {Graphemer | undefined} */
+let splitter;
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
 /**
  * Converts the first letter of a string to uppercase.
  * @param {string} string The string to operate on
@@ -17,6 +37,24 @@ function upperCaseFirst(string) {
     return string[0].toUpperCase() + string.slice(1);
 }
 
+/**
+ * Counts graphemes in a given string.
+ * @param {string} value A string to count graphemes.
+ * @returns {number} The number of graphemes in `value`.
+ */
+function getGraphemeCount(value) {
+    if (ASCII_REGEX.test(value)) {
+        return value.length;
+    }
+
+    if (!splitter) {
+        splitter = new Graphemer();
+    }
+
+    return splitter.countGraphemes(value);
+}
+
 module.exports = {
-    upperCaseFirst
+    upperCaseFirst,
+    getGraphemeCount
 };