You need to sign in to do that
Don't have an account?
Jigar Trivedi
Use of setCallBack() in Lightning
I am new to Lightning and I am completing Lightning Components Developer Guide. Here, in client-side controller, there is a method 'setCallBack()' used to call the method in server-side controller. I Googled for the detailed explanation of this method but could not find anything. Can anyone explain the all possible parameters of the method and other usages. Here is a sample code from Developer Guide.
({ "echo" : function(cmp) { // create a one-time use instance of the serverEcho action // in the server-side controller var action = cmp.get("c.serverEcho"); action.setParams({ firstName : cmp.get("v.firstName") }); // Create a callback that is executed after // the server-side action returns action.setCallback(this, function(response) { var state = response.getState(); // This callback doesn’t reference cmp. If it did, // you should run an isValid() check //if (cmp.isValid() && state === "SUCCESS") { if (state === "SUCCESS") { // Alert the user with the value returned // from the server alert("From server: " + response.getReturnValue()); // You would typically fire a event here to trigger // client-side notification that the server-side // action is complete } //else if (cmp.isValid() && state === "INCOMPLETE") { else if (state === "INCOMPLETE") { // do something } //else if (cmp.isValid() && state === "ERROR") { else if (state === "ERROR") { var errors = response.getError(); if (errors) { if (errors[0] && errors[0].message) { console.log("Error message: " + errors[0].message); } } else { console.log("Unknown error"); } } }); // optionally set storable, abortable, background flag here // A client-side action could cause multiple events, // which could trigger other events and // other server-side action calls. // $A.enqueueAction adds the server-side action to the queue. $A.enqueueAction(action); } })
http://salesforce.stackexchange.com/questions/132629/use-of-setcallback-in-lightning/132638?noredirect=1#comment188941_132638
All Answers
http://salesforce.stackexchange.com/questions/132629/use-of-setcallback-in-lightning/132638?noredirect=1#comment188941_132638
http://salesforce.stackexchange.com/questions/132629/use-of-setcallback-in-lightning/132638?noredirect=1#comment188941_132638