Batch Job Execution MSCRM JavaScript Update

Hi All,

Code below mentioned for BULK Update of Batch Job in MSCRM 2016

function BulkUpdate(multipleEntityIds, destinationEntity) {

            var data = [];

            data.push('--batch_123456');

            data.push('Content-Type: multipart/mixed;boundary=changeset_BBB456');

            data.push('');

            for (var i = 0; i < multipleEntityIds.length; i++) {

                data.push('--changeset_BBB456');

                data.push('Content-Type:application/http');

                data.push('Content-Transfer-Encoding:binary');

                data.push('Content-ID:' + i);

                data.push('');

                data.push('PATCH ' + parent.Xrm.Page.context.getClientUrl() + '/api/data/v8.1/' + destinationEntity + '(' + multipleEntityIds[i].replace("{", "").replace("}", "") + ')' + ' HTTP/1.1');

                data.push('Content-Type:application/json;type=entry');

                data.push('');

                data.push('{ "pa_description":"' + descriptionValues + '" }');

            }

            //end of changeset

            data.push('--changeset_BBB456--');

            //end of batch

            data.push('--batch_123456--');

            var payload = data.join('\r\n');

            $.ajax(

            {

                method: 'PATCH',

                url: Xrm.Page.context.getClientUrl() + '/api/data/v8.1/$batch',

                headers: {

                    'Content-Type': 'multipart/mixed;boundary=batch_123456',

                    'Accept': 'application/json',

                    'Odata-MaxVersion': '4.0',

                    'Odata-Version': '4.0'

                },

                data: payload,

                async: false,

                success: function (data, textStatus, xhr) {

                    var splitstring = currentIds.split(",");

                    for (var i = 0; i < splitstring.length; i++) {

                        alert("Updated Successfully");

                    }

                },

                error: function (xhr, data, textStatus, errorThrown) {

                    alert(data, textStatus + " " + errorThrown);

                }

            });

        }