6). Vue.js Computed block and normal method

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computed property use to make complex logic put in to computed block.
The difference is that computed properties are cached based on their dependencies. A computed property will only re-evaluate when some of its dependencies have changed.
Normal method invocation will always run the function whenever a we call.

 <template>
    <div id="app"> 
     <div class="container">
        <button v-on:click="counter++" class="btn btn-success">Increment</button> 
        <button v-on:click="counter--" class="btn btn-danger">Decrement</button>
        <button v-on:click="taskDone" class="btn btn-info">Completed</button>
        <hr/>
        <p>{{ view }}</p> 
     </div>
   </div>
</template>

<script> 

export default 
{ 
    data :{ 
            counter: 0 
    },
   computed: { 
         view: function () { 
             return this.counter < 0 ? 0 : this.counter; 
         } 
  },
  method:{
        taskDone: function(){
             alert("Task Completed");
        }
  } 
</script>

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