diff --git a/change-notes/1.24/analysis-javascript.md b/change-notes/1.24/analysis-javascript.md
index 880e8893963..20dd26299e1 100644
--- a/change-notes/1.24/analysis-javascript.md
+++ b/change-notes/1.24/analysis-javascript.md
@@ -2,14 +2,16 @@
 
 ## General improvements
 
+* Alert suppression can now be done with single-line block comments (`/* ... */`) as well as line comments (`// ...`).
+
+* Imports with the `.js` extension can now be resolved to a TypeScript file,
+  when the import refers to a file generated by TypeScript.
+
 * Support for the following frameworks and libraries has been improved:
   - [react](https://www.npmjs.com/package/react)
   - [typeahead.js](https://www.npmjs.com/package/typeahead.js)
   - [Handlebars](https://www.npmjs.com/package/handlebars)
 
-- Imports with the `.js` extension can now be resolved to a TypeScript file,
-  when the import refers to a file generated by TypeScript.
-
 ## New queries
 
 | **Query**                                                                       | **Tags**                                                          | **Purpose**                                                                                                                                                                            |
diff --git a/javascript/ql/src/AlertSuppression.ql b/javascript/ql/src/AlertSuppression.ql
index 3e0dea68ad6..43bfe3a020c 100644
--- a/javascript/ql/src/AlertSuppression.ql
+++ b/javascript/ql/src/AlertSuppression.ql
@@ -16,9 +16,11 @@ class SuppressionComment extends Locatable {
 
   SuppressionComment() {
     (
-      text = this.(LineComment).getText() or
+      text = this.(Comment).getText() or
       text = this.(HTML::CommentNode).getText()
     ) and
+    // suppression comments must be single-line
+    not text.matches("%\n%") and
     (
       // match `lgtm[...]` anywhere in the comment
       annotation = text.regexpFind("(?i)\\blgtm\\s*\\[[^\\]]*\\]", _, _)
diff --git a/javascript/ql/test/query-tests/AlertSuppression/AlertSuppression.expected b/javascript/ql/test/query-tests/AlertSuppression/AlertSuppression.expected
index 6e3198e6298..f14b608b2aa 100644
--- a/javascript/ql/test/query-tests/AlertSuppression/AlertSuppression.expected
+++ b/javascript/ql/test/query-tests/AlertSuppression/AlertSuppression.expected
@@ -9,6 +9,7 @@
 | tst.js:8:1:8:18 | // lgtm: blah blah |  lgtm: blah blah | lgtm | tst.js:8:1:8:18 | suppression range |
 | tst.js:9:1:9:32 | // lgtm ... ositive |  lgtm blah blah #falsepositive | lgtm | tst.js:9:1:9:32 | suppression range |
 | tst.js:10:1:10:39 | //lgtm  ... nction] | lgtm  [js/invocation-of-non-function] | lgtm  [js/invocation-of-non-function] | tst.js:10:1:10:39 | suppression range |
+| tst.js:11:1:11:10 | /* lgtm */ |  lgtm  | lgtm | tst.js:11:1:11:10 | suppression range |
 | tst.js:12:1:12:9 | // lgtm[] |  lgtm[] | lgtm[] | tst.js:12:1:12:9 | suppression range |
 | tst.js:14:1:14:6 | //lgtm | lgtm | lgtm | tst.js:14:1:14:6 | suppression range |
 | tst.js:15:1:15:7 | //\\tlgtm | \tlgtm | lgtm | tst.js:15:1:15:7 | suppression range |
@@ -23,6 +24,10 @@
 | tst.js:27:1:27:70 | // lgtm ... nction] |  lgtm[js/debugger-statement] and lgtm[js/invocation-of-non-function] | lgtm[js/invocation-of-non-function] | tst.js:27:1:27:70 | suppression range |
 | tst.js:28:1:28:36 | // lgtm ... ]; lgtm |  lgtm[js/debugger-statement]; lgtm | lgtm | tst.js:28:1:28:36 | suppression range |
 | tst.js:28:1:28:36 | // lgtm ... ]; lgtm |  lgtm[js/debugger-statement]; lgtm | lgtm[js/debugger-statement] | tst.js:28:1:28:36 | suppression range |
+| tst.js:29:1:29:12 | /* lgtm[] */ |  lgtm[]  | lgtm[] | tst.js:29:1:29:12 | suppression range |
+| tst.js:30:1:30:41 | /* lgtm ... ion] */ |  lgtm[js/invocation-of-non-function]  | lgtm[js/invocation-of-non-function] | tst.js:30:1:30:41 | suppression range |
+| tst.js:36:1:36:55 | /* lgtm ... ion] */ |  lgtm[@tag:nullness,js/invocation-of-non-function]  | lgtm[@tag:nullness,js/invocation-of-non-function] | tst.js:36:1:36:55 | suppression range |
+| tst.js:37:1:37:25 | /* lgtm ... ess] */ |  lgtm[@tag:nullness]  | lgtm[@tag:nullness] | tst.js:37:1:37:25 | suppression range |
 | tstWindows.html:5:30:5:42 | <!-- lgtm --> |  lgtm  | lgtm | tstWindows.html:5:1:5:42 | suppression range |
 | tstWindows.js:1:11:1:17 | // lgtm |  lgtm | lgtm | tstWindows.js:1:1:1:17 | suppression range |
 | tstWindows.js:2:1:2:30 | // lgtm ... tement] |  lgtm[js/debugger-statement] | lgtm[js/debugger-statement] | tstWindows.js:2:1:2:30 | suppression range |
@@ -34,6 +39,7 @@
 | tstWindows.js:8:1:8:18 | // lgtm: blah blah |  lgtm: blah blah | lgtm | tstWindows.js:8:1:8:18 | suppression range |
 | tstWindows.js:9:1:9:32 | // lgtm ... ositive |  lgtm blah blah #falsepositive | lgtm | tstWindows.js:9:1:9:32 | suppression range |
 | tstWindows.js:10:1:10:39 | //lgtm  ... nction] | lgtm  [js/invocation-of-non-function] | lgtm  [js/invocation-of-non-function] | tstWindows.js:10:1:10:39 | suppression range |
+| tstWindows.js:11:1:11:10 | /* lgtm */ |  lgtm  | lgtm | tstWindows.js:11:1:11:10 | suppression range |
 | tstWindows.js:12:1:12:9 | // lgtm[] |  lgtm[] | lgtm[] | tstWindows.js:12:1:12:9 | suppression range |
 | tstWindows.js:14:1:14:6 | //lgtm | lgtm | lgtm | tstWindows.js:14:1:14:6 | suppression range |
 | tstWindows.js:15:1:15:7 | //\\tlgtm | \tlgtm | lgtm | tstWindows.js:15:1:15:7 | suppression range |
@@ -48,3 +54,7 @@
 | tstWindows.js:27:1:27:70 | // lgtm ... nction] |  lgtm[js/debugger-statement] and lgtm[js/invocation-of-non-function] | lgtm[js/invocation-of-non-function] | tstWindows.js:27:1:27:70 | suppression range |
 | tstWindows.js:28:1:28:36 | // lgtm ... ]; lgtm |  lgtm[js/debugger-statement]; lgtm | lgtm | tstWindows.js:28:1:28:36 | suppression range |
 | tstWindows.js:28:1:28:36 | // lgtm ... ]; lgtm |  lgtm[js/debugger-statement]; lgtm | lgtm[js/debugger-statement] | tstWindows.js:28:1:28:36 | suppression range |
+| tstWindows.js:29:1:29:12 | /* lgtm[] */ |  lgtm[]  | lgtm[] | tstWindows.js:29:1:29:12 | suppression range |
+| tstWindows.js:30:1:30:41 | /* lgtm ... ion] */ |  lgtm[js/invocation-of-non-function]  | lgtm[js/invocation-of-non-function] | tstWindows.js:30:1:30:41 | suppression range |
+| tstWindows.js:36:1:36:55 | /* lgtm ... ion] */ |  lgtm[@tag:nullness,js/invocation-of-non-function]  | lgtm[@tag:nullness,js/invocation-of-non-function] | tstWindows.js:36:1:36:55 | suppression range |
+| tstWindows.js:37:1:37:25 | /* lgtm ... ess] */ |  lgtm[@tag:nullness]  | lgtm[@tag:nullness] | tstWindows.js:37:1:37:25 | suppression range |
diff --git a/javascript/ql/test/query-tests/AlertSuppression/tst.js b/javascript/ql/test/query-tests/AlertSuppression/tst.js
index 1bbb7d4c5e8..5c853d612e5 100644
--- a/javascript/ql/test/query-tests/AlertSuppression/tst.js
+++ b/javascript/ql/test/query-tests/AlertSuppression/tst.js
@@ -26,3 +26,12 @@ debugger; // lgtm
 // LGTM[js/debugger-statement]
 // lgtm[js/debugger-statement] and lgtm[js/invocation-of-non-function]
 // lgtm[js/debugger-statement]; lgtm
+/* lgtm[] */
+/* lgtm[js/invocation-of-non-function] */
+/* lgtm
+*/
+/* lgtm
+
+*/
+/* lgtm[@tag:nullness,js/invocation-of-non-function] */
+/* lgtm[@tag:nullness] */
diff --git a/javascript/ql/test/query-tests/AlertSuppression/tstWindows.js b/javascript/ql/test/query-tests/AlertSuppression/tstWindows.js
index 1bbb7d4c5e8..5c853d612e5 100644
--- a/javascript/ql/test/query-tests/AlertSuppression/tstWindows.js
+++ b/javascript/ql/test/query-tests/AlertSuppression/tstWindows.js
@@ -26,3 +26,12 @@ debugger; // lgtm
 // LGTM[js/debugger-statement]
 // lgtm[js/debugger-statement] and lgtm[js/invocation-of-non-function]
 // lgtm[js/debugger-statement]; lgtm
+/* lgtm[] */
+/* lgtm[js/invocation-of-non-function] */
+/* lgtm
+*/
+/* lgtm
+
+*/
+/* lgtm[@tag:nullness,js/invocation-of-non-function] */
+/* lgtm[@tag:nullness] */