Executing a function following another function in Angular: A step-by-step guide

Question

Executing a function following another function in Angular: A step-by-step guide

Can you assist me with executing the GetAllSLUDetails() function first and then retrieving a broadcast value from the controllerTa?

//==============call the state function after changed Country Name // get broadcase value from the controllerTa=================    
$scope.$on('evtTACountryCodeSelect', function (event, args) {
    $scope.message = args.message;
    var taCountryCode = $scope.message.split(",")[0];
    var taStateCode = $scope.message.split(",")[1];

    alert(taCountryCode);
    alert(taStateCode);

    GetAllSLUDetails(taCountryCode);
    alert(taStateCode);

    if (taStateCode != "") {              
        document.getElementById("ddlState").value = taStateCode;
    }
});

//================To Get All Records ====================== 
function GetAllSLUDetails(CountryCode) {
   // alert('ctrl State' + CountryCode);
    var Data = stateService.getSLU(CountryCode);
    Data.then(function (d) {
        $scope.StateListUpdate = d.data;
        //alert(d.data);
        alert(JSON.stringify(d));
    }, function () {
        alert('Error');
    });
}

javascript angularjs

Answer 1

Answer №1

Could you please provide more detail about your intention? In general, you can achieve executing a function after another by utilizing callbacks or promises.

If you wish to perform an action after the GetAllSLUDetails function, you have two options:

$scope.$on('evtTACountryCodeSelect', function (event, args) {
    GetAllSLUDetails(taCountryCode, function() {  // Execute this function first
        // Carry out desired tasks
    });
});

function GetAllSLUDetails(CountryCode, callback) {
    // alert('ctrl State' + CountryCode);
    var Data = stateService.getSLU(CountryCode);
    Data.then(function (d) {
        $scope.StateListUpdate = d.data;
        //alert(d.data);
        alert(JSON.stringify(d));
        callback(); // Trigger the callback function here
    }, function () {
        alert('Error');
    });
}

Alternatively, you can make use of Promises:

$scope.$on('evtTACountryCodeSelect', function (event, args) {
    GetAllSLUDetails(taCountryCode).then(function() {  // Perform this function next
        // Do whatever needs to be done
    });
});

function GetAllSLUDetails(CountryCode) {
    return new Promise(function(resolve, reject) { // Create a new Promise object
        // alert('ctrl State' + CountryCode);
        var Data = stateService.getSLU(CountryCode);
        Data.then(function (d) {
            $scope.StateListUpdate = d.data;
            //alert(d.data);
            alert(JSON.stringify(d));
            resolve(d); // Resolve the Promise with data
        }, function (error) {
            alert('Error');
            reject(error); // Reject the Promise with an error
        });
    });
}

Answer 2

Could you please provide more detail about your intention? In general, you can achieve executing a function after another by utilizing callbacks or promises.

If you wish to perform an action after the GetAllSLUDetails function, you have two options:

$scope.$on('evtTACountryCodeSelect', function (event, args) {
    GetAllSLUDetails(taCountryCode, function() {  // Execute this function first
        // Carry out desired tasks
    });
});

function GetAllSLUDetails(CountryCode, callback) {
    // alert('ctrl State' + CountryCode);
    var Data = stateService.getSLU(CountryCode);
    Data.then(function (d) {
        $scope.StateListUpdate = d.data;
        //alert(d.data);
        alert(JSON.stringify(d));
        callback(); // Trigger the callback function here
    }, function () {
        alert('Error');
    });
}

Alternatively, you can make use of Promises:

$scope.$on('evtTACountryCodeSelect', function (event, args) {
    GetAllSLUDetails(taCountryCode).then(function() {  // Perform this function next
        // Do whatever needs to be done
    });
});

function GetAllSLUDetails(CountryCode) {
    return new Promise(function(resolve, reject) { // Create a new Promise object
        // alert('ctrl State' + CountryCode);
        var Data = stateService.getSLU(CountryCode);
        Data.then(function (d) {
            $scope.StateListUpdate = d.data;
            //alert(d.data);
            alert(JSON.stringify(d));
            resolve(d); // Resolve the Promise with data
        }, function (error) {
            alert('Error');
            reject(error); // Reject the Promise with an error
        });
    });
}

Executing a function following another function in Angular: A step-by-step guide

Answer №1

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