--- /dev/null
+/**
+ * @fileoverview Rule to flag when deleting variables
+ * @author Ilya Volodin
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+ meta: {
+ type: "suggestion",
+
+ docs: {
+ description: "disallow deleting variables",
+ category: "Variables",
+ recommended: true,
+ url: "https://eslint.org/docs/rules/no-delete-var"
+ },
+
+ schema: [],
+
+ messages: {
+ unexpected: "Variables should not be deleted."
+ }
+ },
+
+ create(context) {
+
+ return {
+
+ UnaryExpression(node) {
+ if (node.operator === "delete" && node.argument.type === "Identifier") {
+ context.report({ node, messageId: "unexpected" });
+ }
+ }
+ };
+
+ }
+};