diff --git a/services/web/Makefile b/services/web/Makefile
index 0e22d924db..44bb625d73 100644
--- a/services/web/Makefile
+++ b/services/web/Makefile
@@ -410,17 +410,17 @@ $(WITH_NODE_MODULES_PATH): export PATH=$(NODE_MODULES_PATH)
 lint: lint_backend
 lint_backend:
 	npx eslint \
-		'app.{js,ts,tsx}' \
-		'app/**/*.{js,ts,tsx}' \
-		'modules/*/index.{js,ts,tsx}' \
-		'modules/*/app/**/*.{js,ts,tsx}' \
+		'app.{js,mjs,ts,tsx}' \
+		'app/**/*.{js,mjs,ts,tsx}' \
+		'modules/*/index.{js,mjs,ts,tsx}' \
+		'modules/*/app/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint: lint_frontend
 lint_frontend:
 	npx eslint \
-		'frontend/**/*.{js,ts,tsx}' \
-		'modules/**/frontend/**/*.{js,ts,tsx}' \
+		'frontend/**/*.{js,mjs,ts,tsx}' \
+		'modules/**/frontend/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint: lint_test
@@ -428,34 +428,34 @@ lint_test: lint_test_app
 lint_test_app: lint_test_app_unit
 lint_test_app_unit:
 	npx eslint \
-		'test/unit/**/*.{js,ts,tsx}' \
+		'test/unit/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint_test_app: lint_test_app_rest
 lint_test_app_rest:
 	npx eslint \
-		'test/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'test/unit/**/*.{js,ts,tsx}' \
+		'test/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'test/unit/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint_test: lint_test_modules
 lint_test_modules:
 	npx eslint \
-		'modules/*/test/**/*.{js,ts,tsx}' \
+		'modules/*/test/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint: lint_misc
 # migrations, scripts, webpack config, karma config
 lint_misc:
 	npx eslint . \
-		--ignore-pattern 'app.{js,ts,tsx}' \
-		--ignore-pattern 'app/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'modules/*/app/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'modules/*/index.{js,ts,tsx}' \
-		--ignore-pattern 'frontend/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'modules/**/frontend/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'test/**/*.{js,ts,tsx}' \
-		--ignore-pattern 'modules/*/test/**/*.{js,ts,tsx}' \
+		--ignore-pattern 'app.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'app/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'modules/*/app/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'modules/*/index.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'frontend/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'modules/**/frontend/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'test/**/*.{js,mjs,ts,tsx}' \
+		--ignore-pattern 'modules/*/test/**/*.{js,mjs,ts,tsx}' \
 		--max-warnings=0
 
 lint: lint_pug
diff --git a/services/web/frontend/js/features/source-editor/lezer-latex/tokens.mjs b/services/web/frontend/js/features/source-editor/lezer-latex/tokens.mjs
index 30478dd7e3..29674c79c6 100644
--- a/services/web/frontend/js/features/source-editor/lezer-latex/tokens.mjs
+++ b/services/web/frontend/js/features/source-editor/lezer-latex/tokens.mjs
@@ -169,11 +169,9 @@ export const lstinlineTokenizer = new ExternalTokenizer(
       delimiter = CHAR_CLOSE_BRACE
     }
     input.advance()
-    let content = ''
     for (;;) {
-      let next = input.next
+      const next = input.next
       if (next === -1 || next === CHAR_NEWLINE) return
-      content += String.fromCharCode(next)
       input.advance()
       if (next === delimiter) break
     }
diff --git a/services/web/package.json b/services/web/package.json
index 1ebcff6e34..a9dc93d748 100644
--- a/services/web/package.json
+++ b/services/web/package.json
@@ -27,7 +27,7 @@
     "format:styles": "prettier --list-different $PWD/'**/*.less'",
     "format:styles:fix": "prettier --write $PWD/'**/*.less'",
     "lint": "eslint --max-warnings 0 --format unix --ext .js,.mjs,.ts,.tsx .",
-    "lint:fix": "eslint --fix --ext .js,.ts,.tsx .",
+    "lint:fix": "eslint --fix --ext .js,.mjs,.ts,.tsx .",
     "type-check": "tsc --noEmit",
     "extract-translations": "i18next-scanner",
     "migrations": "east",