1 files changed, 54 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/no-alert.js b/tools/eslint/lib/rules/no-alert.js
new file mode 100644
index 0000000000..1f14b533d7
--- /dev/null
+++ b/tools/eslint/lib/rules/no-alert.js
@@ -0,0 +1,54 @@
+/**
+ * @fileoverview Rule to flag use of alert, confirm, prompt
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+function matchProhibited(name) {
+    return name.match(/^(alert|confirm|prompt)$/);
+}
+
+function report(context, node, result) {
+    context.report(node, "Unexpected {{name}}.", { name: result[1] });
+}
+
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    return {
+
+        "CallExpression": function(node) {
+
+            var result;
+
+            // without window.
+            if (node.callee.type === "Identifier") {
+
+                result = matchProhibited(node.callee.name);
+
+                if (result) {
+                    report(context, node, result);
+                }
+
+            } else if (node.callee.type === "MemberExpression" && node.callee.property.type === "Identifier") {
+
+                result = matchProhibited(node.callee.property.name);
+
+                if (result && node.callee.object.name === "window") {
+                    report(context, node, result);
+                }
+
+            }
+
+        }
+    };
+
+};