How to use the sweetalert2.showLoading function in sweetalert2

const spinnerHtml = `
          <div>
              <div class="text-center">傳送到 HKEPC 伺服器中</div>
          </div>
        `

      swal({
        animation: false,
        html: spinnerHtml,
        allowOutsideClick: false,
        showCancelButton: false,
        showConfirmButton: false
      })

      swal.showLoading()

      // Post to the server
      this.apiService.dynamicRequest({
        method: 'POST',
        url: actionUrl,
        data: {
          subject: subject,
          message: replyMessage,
          typeid: _.get(post, 'category.id', undefined),
          handlekey: 'newthread',
          topicsubmit: true,
          ...hiddenFormInputs,
          ...imageFormData,
          ...deleteImageFormData
        },
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }

onBeforeOpen: () => {
            Swal.showLoading()
        }
    })

onOpen: () => {
                            swal.showLoading()
                          }                         
                     })

onOpen: () => {
                                swal.showLoading()
                            }
                        })

onOpen: () => {
                                swal.showLoading()
                              }                         
                         })

showLoading () {
    const spinnerHtml = `
          <div>
              <div class="text-center">驗証用戶資料中</div>
          </div>
        `

    swal({
      animation: false,
      html: spinnerHtml,
      allowOutsideClick: false,
      showCancelButton: false,
      showConfirmButton: false
    })

    swal.showLoading()
  }

onOpen: () => {
                                swal.showLoading()
                            }
                        })

onOpen: () => {
                          swal.showLoading()
                        }
                      })

onOpen: () => {
                                swal.showLoading()
                            }
                        })

export default function (event) {
    swal.showLoading();
    loadModules(['esri/request']).then(([Request]) => {
        new Request(event.item.layer.url, {
            query: {f: 'json'},
            responseType: 'json'
        }).then((response) => {
            swal({
                title: event.item.layer.title,
                text: response.data.description
            });
        });
    });
}