title: Flutter and InAppWebView How to get height?
body: <p>In flutter, when using Webview, you sometimes want to display contents above and under it.</p>
  <p>Problem - 1 ? Webview need constraints else it couldn't be displayed : you need to wrap the Webview under a container with a fixed size or under a column with an expandable or somethings like that.</p>
  <p>Problem - 2 ? Height could be easily fetched but sometimes Webview load asynchronous data like embed script which will change the style of the page. In this situation it's hard to known how and when fetch the Webview height.</p>
  <p>With these problem, most of the times your Webview will display a scroll bar and when reached the bottom of the webview user will have trouble to scroll your flutter page. The scroll will conflict with the Webview.</p>
  <p>What is the best way to fix that ?</p>