Not sure it's a great solution for deep study, but if you just need a quick peek, the Chrome developer tools include a pretty print/ format option when applicab

Not sure it's a great solution for deep study, but if you just need a quick peek, the Chrome developer tools include a pretty print/ format option when applicable: https://developers.google.com/web/tools/chrome-devtools/javascript/reference#format https://developers.google.com/web/tools/chrome-devtools/java...