1 files changed, 43 insertions, 2 deletions
diff --git a/tools/node_modules/eslint/lib/rules/id-length.js b/tools/node_modules/eslint/lib/rules/id-length.js
index 99f833fc73..bd269b998f 100644
--- a/tools/node_modules/eslint/lib/rules/id-length.js
+++ b/tools/node_modules/eslint/lib/rules/id-length.js
@@ -7,6 +7,45 @@
 "use strict";
 
 //------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+const GraphemeSplitter = require("grapheme-splitter");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Checks if the string given as argument is ASCII or not.
+ * @param {string} value A string that you want to know if it is ASCII or not.
+ * @returns {boolean} `true` if `value` is ASCII string.
+ */
+function isASCII(value) {
+    if (typeof value !== "string") {
+        return false;
+    }
+    return /^[\u0020-\u007f]*$/u.test(value);
+}
+
+/** @type {GraphemeSplitter | undefined} */
+let splitter;
+
+/**
+ * Gets the length of the string. If the string is not in ASCII, counts graphemes.
+ * @param {string} value A string that you want to get the length.
+ * @returns {number} The length of `value`.
+ */
+function getStringLength(value) {
+    if (isASCII(value)) {
+        return value.length;
+    }
+    if (!splitter) {
+        splitter = new GraphemeSplitter();
+    }
+    return splitter.countGraphemes(value);
+}
+
+//------------------------------------------------------------------------------
 // Rule Definition
 //------------------------------------------------------------------------------
 
@@ -130,8 +169,10 @@ module.exports = {
                 const name = node.name;
                 const parent = node.parent;
 
-                const isShort = name.length < minLength;
-                const isLong = name.length > maxLength;
+                const nameLength = getStringLength(name);
+
+                const isShort = nameLength < minLength;
+                const isLong = nameLength > maxLength;
 
                 if (!(isShort || isLong) || exceptions.has(name) || matchesExceptionPattern(name)) {
                     return; // Nothing to report