Chrome -> Inspect element -> Network (XHR) -> Preview Tab (HTML) issue
google-chrome, inspect-element, preview, response, xmlhttprequest
Solution
I was testing this as well. What did it for me was adding the http header.
header('HTTP/1.1 500 Internal Server Error');
Then of course some proper markup formatting. But the status code was what I needed to convince chrome to render the preview.
Problem
I am having a problem with that preview tab in network section. When HTML is returned I am seeing the raw HTML in both preview and response. Sometimes, but very rarely, I HTML is rendered properly in Preview tab. Am I doing something wrong or it's just some Chrome bug? Thanks