ignore webpack's single-letter properties

Author: sandersn

index.test.ts

@@ -99,6 +99,15 @@ The JavaScript module exports a property named 'foo', which is missing from the
             }
         ]));
     },
+    noMissingWebpackProperty() {
+        expect(checkSource(
+            "missingJsProperty",
+            "testsource/webpackPropertyNames.d.ts",
+            "testsource/webpackPropertyNames.js",
+            allErrors,
+            false,
+        )).toHaveLength(0);
+    },
     missingDtsProperty() {
         expect(checkSource(
             "missingDtsProperty",
@@ -247,4 +256,4 @@ Try adding -browser to the end of the name to get
             },
         ]);
     }
-});
+});

index.ts

@@ -703,7 +703,7 @@ function getDtsDefaultExport(sourceFile: ts.SourceFile, moduleType: InferenceRes
     return undefined;
 }
 
-const ignoredProperties = ["__esModule", "prototype", "default"];
+const ignoredProperties = ["__esModule", "prototype", "default", "F", "G", "S", "P", "B", "W", "U", "R"];
 
 function ignoreProperty(property: ts.Symbol): boolean {
     const name = property.getName();

testsource/webpackPropertyNames.d.ts

@@ -0,0 +1 @@
+export var normal: string;

testsource/webpackPropertyNames.js

@@ -0,0 +1,12 @@
+var $export = {};
+// type bitmap
+$export.F = 1;   // forced
+$export.G = 2;   // global
+$export.S = 4;   // static
+$export.P = 8;   // proto
+$export.B = 16;  // bind
+$export.W = 32;  // wrap
+$export.U = 64;  // safe
+$export.R = 128; // real proto method for `library`
+$export.normal = "hi";
+module.exports = $export;