Added test

tests/cases/fourslash/getJavaScriptCompletions22.ts

@@ -0,0 +1,12 @@
+/// <reference path="fourslash.ts" />
+
+// Regresion test for GH#45436
+
+// @allowNonTsExtensions: true
+// @Filename: file.js
+//// const abc = {};
+//// ({./*1*/});
+
+goTo.marker('1');
+edit.insert('.');
+verify.completions({ exact: undefined });