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node_modules/eslint/lib/rules/no-obj-calls.js

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+/**
+ * @fileoverview Rule to flag use of an object property of the global object (Math and JSON) as a function
+ * @author James Allardice
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const { CALL, ReferenceTracker } = require("eslint-utils");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+const nonCallableGlobals = ["Atomics", "JSON", "Math", "Reflect"];
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "problem",
+
+        docs: {
+            description: "disallow calling global object properties as functions",
+            category: "Possible Errors",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-obj-calls"
+        },
+
+        schema: [],
+
+        messages: {
+            unexpectedCall: "'{{name}}' is not a function."
+        }
+    },
+
+    create(context) {
+
+        return {
+            Program() {
+                const scope = context.getScope();
+                const tracker = new ReferenceTracker(scope);
+                const traceMap = {};
+
+                for (const global of nonCallableGlobals) {
+                    traceMap[global] = {
+                        [CALL]: true
+                    };
+                }
+
+                for (const { node } of tracker.iterateGlobalReferences(traceMap)) {
+                    context.report({ node, messageId: "unexpectedCall", data: { name: node.callee.name } });
+                }
+            }
+        };
+    }
+};