postgresql - Javascript Web Map Pop-up -


i trying create web map pop triggered user click , displays data postgresql database in relation click event. far have got pop-up working below:

// start of popup     map.on('singleclick', function(evt) {     var coordinate = evt.coordinate;     var view = map.getview();     content.innerhtml = '';     var viewresolution = /** @type {number} */ (view.getresolution());     var url = sql_view.getsource().getgetfeatureinfourl(             evt.coordinate, view.getresolution(), view.getprojection(),             {'info_format': 'text/html'});      if (url) {     content.innerhtml =         '<iframe seamless src="' + url + '"></iframe>';     }     overlay.setposition(coordinate);     }); // end of popup

however, there possibility knows how can style better iframe not working well. can event created not create pop-up when there no corresponding data click event? every option have tried either deletes pop-up or cause blank pop-up.


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