ErrorHandling

<aura:attribute name="messages" type="Aura.Component[]" access="GLOBAL"/>


<div aura:id="messages">
        {!v.messages}
  </div>

//Script for Error handling
else if (state === "ERROR") {
	     var errors = response.getError();
	                if (errors) {
	                    if (errors[0] && errors[0].pageErrors) {
	                    	console.log(errors[0].pageErrors);
	                        $A.createComponents([
					["ui:message",{
					"title" : "Deletion Failed:",
				        "severity" : "error",
					}],
					["ui:outputText",{
					"value" : errors[0].pageErrors[0].message
					}]
					],
				function(components) {
				       var message = components[0];
				var outputText = components[1];
																						// set the body of the ui:message to be the ui:outputText
																						message.set("v.body", outputText);													component.set("v.messages", message);  												       setTimeout(function() {
																					        $A.run(function() {														            component.set("v.messages", []);                                       
					  });
					}, 10000)
				 } )   
																					}					
	                } else {
	                    $A.error("Unknown error");
	                }
            	}