Fixing util inspect browser polyfill

Author: terehov

src/runtime/browser/util.inspect.polyfil.ts

@@ -60,7 +60,7 @@ function isBoolean(arg: unknown) {
 }
 
 function isUndefined(arg: unknown) {
-  return arg === void 0;
+  return arg == null;
 }
 
 function stylizeNoColor(str: string) {
@@ -70,7 +70,7 @@ function stylizeNoColor(str: string) {
 function stylizeWithColor(str: string, styleType: string) {
   const style = inspect.styles[styleType];
 
-  if (style) {
+  if (style != null && inspect?.colors?.[style]?.[0] != null && inspect?.colors?.[style]?.[1] != null) {
     return "\u001b[" + inspect.colors[style][0] + "m" + str + "\u001b[" + inspect.colors[style][1] + "m";
   } else {
     return str;

tests/Browser/1_json.test.ts

@@ -55,4 +55,14 @@ describe("Browser: JSON: Log level", () => {
 
     expect(consoleOutput).toContain("Test");
   });
+
+  it("pretty no styles undefined", async () => {
+    await page.evaluate(() => {
+      // @ts-ignore
+      const logger = new tslog.Logger({ type: "pretty", stylePrettyLogs: false });
+      logger.fatal("Test undefined", { test: undefined });
+    });
+
+    expect(consoleOutput).toContain("Test undefined");
+  });
 });