Show loading image while $.Ajax ASYNC SYNC is performed

Show loading image while $.Ajax ASYNC SYNC is performed

How to show progress bar while loading using Ajax call? 

The AJAX Request maybe ASYNC or SYNC!

Table of Context –
1.     HTML
2.     CSS
3.     JavaScript and Ajax Request

HTML Code –
<div id="wait" class="ajax-loader">
        <div class="ajax-loader-img"><img src='~/Images/loader-ui/loading_2x.gif' /><br>wait...</div>        
</div> 

CSS Code –
.ajax-loader {
    display:none;position:absolute;width:100%; height:100%; z-index:99999; background-color:rgba(256,256,256,0.4);
}

.ajax-loader-img {
   position:absolute;top:50%;left:50%;padding:2px;
}

AJAX ASYNC and SYNC REQUEST Code –
//#region AJAX ASYNC REQUEST

    var asyncCall = function (url, data, GETPOST, callback, arr_hdrs) {
        var global = pm.baseConst;
            $.ajax({
                url: global.baseUrl + url,
                type: GETPOST,
                contentType: global.contentType,
                data: data,
                beforeSend: function (xhr) {
                     //THIS IS USED FOR DISPLY LOADING WAIT.. AFTER POST CALL!
             if (GETPOST !== undefined && GETPOST !== null) {
              if (GETPOST.toLowerCase() === 'post' || GETPOST.toLowerCase() === 'put')
                  $("#wait").css("display", "block");
              }
                },
                async: true,
                cache: false,
                success: function (data) {
                    //FOR LOADING ICON DISPLAY BLOCK HERE..
                    $("#wait").css("display", "none");

                    if (data !== undefined && data !== null && data !== "") {                       
                        if (data.Code !== undefined && data.Code !== null && data.Code !== "") {
                            if (data.Code.toLowerCase() === "ok") {
                                callback(data);                        
                            }
                            else if (data.Code.toLowerCase() === "error") {
                                pm.dialog.alertDialog('error', 'Error', 'Error', data.Message, null);
                            }
                            else if (data.Code.toLowerCase() === "warning") {
                                pm.dialog.alertDialog('info', 'Information', 'Information', data.Message, null);
                            }
                            else {
                                pm.dialog.alertDialog('error', 'Error', 'Error', pm.constant.request.unableToProcessYourRequest, null);
                            }
                        }                   
                        else {
                            callback(data);
                        }
                    }
                    else if (data === null) {
                        callback(data);
                    }
                    else {
                        pm.dialog.alertDialog('error', 'Error', 'Error', pm.constant.request.unableToProcessYourRequest, null);
                    }                   
                },
                error: function (jqXHR, textStatus, errorThrown) {
                    jqXHRError(jqXHR, errorThrown);
                },
                complete: function () {
                    //FOR LOADING ICON DISPLAY BLOCK HERE..
                    $("#wait").css("display", "none");
                }
            })
            .fail(function (jqXHR, textStatus, errorThrown) {
                jqXHRError(jqXHR, errorThrown);
            });
    };

//#endregion

Result –
References -

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ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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