1 files changed, 40 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-compare-against-boolean-literals.js b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-compare-against-boolean-literals.js
new file mode 100644
index 0000000000..0dc986685a
--- /dev/null
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/no-compare-against-boolean-literals.js
@@ -0,0 +1,40 @@
+/**
+ * @fileoverview Restrict comparing against `true` or `false`.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+"use strict";
+
+module.exports = {
+  meta: {
+    docs: {
+      url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/no-compare-against-boolean-literals.html",
+    },
+    messages: {
+      noCompareBoolean:
+        "Don't compare for inexact equality against boolean literals",
+    },
+    schema: [],
+    type: "suggestion",
+  },
+
+  create(context) {
+    return {
+      BinaryExpression(node) {
+        if (
+          ["==", "!="].includes(node.operator) &&
+          (["true", "false"].includes(node.left.raw) ||
+            ["true", "false"].includes(node.right.raw))
+        ) {
+          context.report({
+            node,
+            messageId: "noCompareBoolean",
+          });
+        }
+      },
+    };
+  },
+};