<template>
  <p>
    <span>Count is: {{ count }}</span>
    <button @click="count++">increment</button>
    is positive: {{ isPositive }} 
  </p>
</template>

<script>
export default {
  data: () => ({ count: 0 }),
  computed: {
    isPositive() { return this.count > 0 } 
  }
}
</script>