when target="_blank" webview can not open url

1. version：nwjs-sdk-v0.21.5-win-x64
2. webview page

<div class="webview">
	<webview id="foo" src="http://xxxx/index.html" autosize="on"></webview>
</div>

1. http://xxxx/index.html page <a href="http://www.baidu.com" target="_blank">_blank</a> when target=“_blank”，webview cannot open url; when target=“_self” is ok Demo_20170413Z64_.zip

[xzhan96]

please refer to https://developer.chrome.com/apps/tags/webview#type-NewWindow/ and below code:

<script type="text/javascript">
function onNewWindow(event) {
  console.log("xiaofeng: ===================="+  event.windowOpenDisposition);

  switch (event.windowOpenDisposition) {
    case 'ignore':
      // Not sure what this is used by.  Default enum value, maybe.
      console.debug('Ignoring new window request');
      return;

    case 'save_to_disk':
      // Ctrl + S, maybe?  Not sure how to reproduce that.
      console.log('save_to_disk is not implemented');
      return;

    case 'current_tab':
      console.log("xiaofeng: ==================== current_tab");
      return;

    case 'new_background_tab':
    case 'new_foreground_tab':
      newWindow = open(event.targetUrl, '_blank');
      if (event.windowOpenDisposition != 'new_background_tab') {
        newWindow.focus();
      }
      break;

    case 'new_window':
    case 'new_popup':
      // if (event.initialWidth && event.initialHeight) {
      //   features = 'width=' + event.initialWidth + ',height=' + event.initialHeight;
      // }
      newWindow = open(event.targetUrl, '_blank');
      newWindow.focus();
      break;
  }
}

  window.onload = function() {
  var webview = document.getElementById('foo');
  console.log("+++++++++++++++++");
  webview.addEventListener('newwindow', onNewWindow);
};
</script>

[xzhan96]

@andy-huaan Chrome app also has the same result and error log:

“<webview>: A new window was blocked.”, source: extensions::webViewActionRequests (84)

@Christywl I think it’s just the “webview” tag limitation instead of a bug. please refer to http://stackoverflow.com/questions/18428668/how-to-open-a-new-window-from-a-link-in-a-webview-in-a-chrome-packaged-app.