Steps: fixes issue #14502

[sinchang]

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Fixes #14502

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[island205]

More good fix?:

  mounted() {
    const unwatch = this.$watch('index', val => {
      this.$watch('$parent.active', this.updateStatus, { immediate: true });
      this.$watch('$parent.processStatus', () => {
        let val = this.$parent.active
        if (val > this.index) {
          this.internalStatus = this.$parent.finishStatus;
        } else if (val === this.index && this.prevStatus !== 'error') {
          this.internalStatus = this.$parent.processStatus;
        } else {
          this.internalStatus = 'wait';
        }
      }, { immediate: true });
      unwatch();
    });
  }

[sinchang]

@island205 good point! thank you.

[island205]

@wacky6 Would you like to review this PR?