docs: add 'when not to use it' section in no-duplicate-case docs (#15563

) Fixes #15552
eslint · Feb 2, 2022 · a8dd5a2 · a8dd5a2
1 parent 1ad439e
commit a8dd5a2
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/docs/rules/no-duplicate-case.md b/docs/rules/no-duplicate-case.md
@@ -91,3 +91,18 @@ switch (a) {
         break;
 }
 ```
+
+## When Not To Use It
+
+In rare cases where identical test expressions in `case` clauses produce different values, which necessarily means that the expressions are causing and relying on side effects, you will have to disable this rule.
+
+```js
+switch (a) {
+    case i++:
+        foo();
+        break;
+    case i++: // eslint-disable-line no-duplicate-case
+        bar();
+        break;
+}
+```