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How To Create the Namespace in JavaScript?

Create the Namespace in JavaScript-

You can see the below example in Detail-
//AJAX Synchronous and Asynchronous Requests.

//#REGION NAMESPACE
var demo = demo || {};
//#ENDREGION

demo.ajax = demo.ajax || (function () {
    var getBaseURL = function () {
        var currentBaseURL = location.protocol + "//" + location.hostname +
            (location.port && ":" + location.port) + "/";
        return currentBaseURL;
    };

    var baseURL = getBaseURL();
    var request_token;

    var ajaxAsyncCall = function (requestURL, typeGP, inputs, request_token) {
        //Ajax Async CALL
        $.ajax({
            url: requestURL,
            type: typeGP,
            contentType: "application/json; charset=utf-8",
            data: inputs,
            beforeSend: function (xhr) {
                xhr.setRequestHeader("Request_Token", request_token)
            },
            async: true,
            cache: false,
            success: function (data) {
                if (data !== undefined && data !== null) {
                    if (data.Code == "OK") {
                        alert("Success");
                        return false;
                    }
                    else if (data.Code == "ERROR") {
                        alert('Error - ' + data.Message);
                        return false;
                    }
                }
            }
        });
    };

    var ajaxSyncCall = function (requestURL, typeGP, inputs, request_token) {
        //Ajax Sync CALL
        $.ajax({
            url: requestURL,
            type: true,
            contentType: "application/json; charset=utf-8",
            data: inputs,
            beforeSend: function (xhr) {
                xhr.setRequestHeader("Request_Token", request_token)
            },
            async: false,
            cache: false,
            success: function (data) {
                if (data !== undefined && data !== null) {
                    if (data.Code == "OK") {
                        alert("Success");
                        return false;
                    }
                    else if (data.Code == "ERROR") {
                        alert('Error - ' + data.Message);
                        return false;
                    }
                }
            }
        });
    };

    return {
        baseURL:baseURL,
        ajaxAsyncCall: ajaxAsyncCall,
        ajaxSyncCall: ajaxSyncCall
    }
})();


Use of CREATED Synchronous and Asynchronous common methods in other JavaScript file.
//Use of common Synchronous and Asynchronous methods.
//GET CUSTOMERS LIST WITH SYNC CALL.
demo.ajax.ajaxSyncCall(demo.ajax.baseURL + "API/Users/GetUsersRequest", 'GET', null, function (data) {
    if (data != undefined) {
        successGetCustomers(data);
    }
}, null);

//GET CUSTOMERS LIST WITH ASYNC CALL.
demo.ajax.ajaxAsyncCall(demo.ajax.baseURL + "API/Users/GetUsersRequest", 'GET', null, function (data) {
    if (data != undefined) {
        successGetCustomers(data);
    }
}, null);

//Success Method
var successGetCustomers = function (data) {
    if (data) {
        console.log(data);
        //TODO: As PER YOU!
    }
};

ü  Stayed Informed –  Object Oriented JavaScript Interview Questions
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