Documentation example for removing header doesn't remove header

[rmzg]

The API.md page has the following example:

await page.setRequestInterception(true);
page.on('request', request => {
  // Override headers
  const headers = Object.assign({}, request.headers(), {
    foo: 'bar', // set "foo" header
    origin: undefined, // remove "origin" header
  });
  request.continue({headers});
});

When the example is executed as follows:

req.continue({headers:{'pragma': undefined}});

The actual headers look like:

Connection: keep-alive
Pragma: undefined
Cache-Control: no-cache
Referer: http://www.google.com/
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/77.0.3835.0 Safari/537.36

Notice that Pragma is still there, merely its value replaced.

[fastjien]

i have the same issues.