Izmjenjena struktura, dodan backand

web/node_modules/eslint/lib/rules/guard-for-in.js

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+/**
+ * @fileoverview Rule to flag for-in loops without if statements inside
+ * @author Nicholas C. Zakas
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "require `for-in` loops to include an `if` statement",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        schema: []
+    },
+
+    create(context) {
+
+        return {
+
+            ForInStatement(node) {
+
+                /*
+                 * If the for-in statement has {}, then the real body is the body
+                 * of the BlockStatement. Otherwise, just use body as provided.
+                 */
+                const body = node.body.type === "BlockStatement" ? node.body.body[0] : node.body;
+
+                if (body && body.type !== "IfStatement") {
+                    context.report({ node, message: "The body of a for-in should be wrapped in an if statement to filter unwanted properties from the prototype." });
+                }
+            }
+        };
+
+    }
+};