# Basic ```html Error Process Wait Finish ``` ```js import mdArrowRoundBack from 'naive-ui/lib/icons/md-arrow-round-back' import mdArrowRoundForward from 'naive-ui/lib/icons/md-arrow-round-forward' export default { components: { mdArrowRoundBack, mdArrowRoundForward }, data () { return { current: 1, currentStatus: 'error' } }, methods: { next () { if (this.current === null) this.current = 1 else if (this.current >= 4) this.current = null else this.current++ }, prev () { if (this.current === 0) this.current = null else if (this.current === null) this.current = 4 else this.current-- } } } ``` ```css .n-button-group { margin: 8px 16px 8px 0; } ```