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app_vue/node_modules/eslint/lib/rules/require-unicode-regexp.js

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+/**
+ * @fileoverview Rule to enforce the use of `u` flag on RegExp.
+ * @author Toru Nagashima
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const {
+    CALL,
+    CONSTRUCT,
+    ReferenceTracker,
+    getStringIfConstant
+} = require("eslint-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "enforce the use of `u` flag on RegExp",
+            category: "Best Practices",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/require-unicode-regexp"
+        },
+
+        messages: {
+            requireUFlag: "Use the 'u' flag."
+        },
+
+        schema: []
+    },
+
+    create(context) {
+        return {
+            "Literal[regex]"(node) {
+                const flags = node.regex.flags || "";
+
+                if (!flags.includes("u")) {
+                    context.report({ node, messageId: "requireUFlag" });
+                }
+            },
+
+            Program() {
+                const scope = context.getScope();
+                const tracker = new ReferenceTracker(scope);
+                const trackMap = {
+                    RegExp: { [CALL]: true, [CONSTRUCT]: true }
+                };
+
+                for (const { node } of tracker.iterateGlobalReferences(trackMap)) {
+                    const flagsNode = node.arguments[1];
+                    const flags = getStringIfConstant(flagsNode, scope);
+
+                    if (!flagsNode || (typeof flags === "string" && !flags.includes("u"))) {
+                        context.report({ node, messageId: "requireUFlag" });
+                    }
+                }
+            }
+        };
+    }
+};