Unable to open external links in webview

[nicholaslee]

I've created an app with a webview in it.
It is able to load websites and navigate to pages that are related to the url.
However, when external links such as "view on facebook, twitter, etc" or external url on emails, upon clicking, nothing happens.
How do I fix this? How do I make it such that another window will pop up? Any help is appreciated :)