How to use the systeminformation.cpuCurrentspeed function in systeminformation

let intervalId = setInterval(() => {
      si.currentLoad().then(data => {
        this.setState({ load: data });
      });

      si.cpuCurrentspeed().then(data => {
        this.setState({ speed: data });
      });

      si.cpuTemperature()
        .then(data => {
          this.setState({ temp: data });
        })

        .catch(error => console.error(error));
    }, 1000);
    this.setState({ intervalId: intervalId });

export const UpdateCPUInfo = () => {
	si.cpuCurrentspeed(function(speed) {
		si.cpuTemperature(function(temp) {
			si.currentLoad(function(load) {
				SYSINFO.cpu = {
					speed,
					temp,
					load
				}
			})
		})
	})
}