Google maps hide/display issue -

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i using ionic framework (though not sure that's relevant) , have view user can toggle between map , list mode. issue if initial mode list, , user toggles, map cropped/messed up. if initial mode map itself, well. have codepen - http://codepen.io/anon/pen/oprvrg - illustrate issue experiencing. it's set map mode right now, can change line 

$scope.viewmode = 'map';

to 

$scope.viewmode = 'list';

to see problem. ideas why happening or how fix/get around it?

changed changeviewmethod 

function changeviewmode (){ if (viewmode == 'map'){     document.getelementbyid('map-canvas').style.display = 'none';     document.getelementbyid('list-canvas').style.display = 'block';     viewmode = 'list';   } else {     document.getelementbyid('map-canvas').style.display = 'block';     document.getelementbyid('list-canvas').style.display = 'none';     viewmode = 'map';     google.maps.event.trigger(map, 'resize');     map.panto(new google.maps.latlng(-34.397, 150.644));   } }

and solved issue in second (pure maps) codepen.


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