vue.js2.0下出现warn错误

1. 出现这个问题，请问如何解决，求解

1. 代码如下：

   var app = new Vue({

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   el: '#app', data: {     steps: [         { name: 'Hello Vue!', completed: false },         { name: 'Hello World!', completed: false }     ],     newStep: '' }, mounted: function(){     this.fetchSteps(); }, methods: {     fetchSteps: function(){         this.$http.get('/tasks/2/steps').then((response) => {             // success             Vue.set(this, 'steps', response.body);         }, (response) => {             // error             response.status;         });     },     addStep: function(){         this.steps.push({ name: this.newStep, completed: false });         this.newStep = '';     },     complete: function(step){         step.completed = true;     },     removeStep: function(step){         var index = this.steps.indexOf(step);         this.steps.splice(index, 1);     },     editStep: function(step){         this.removeStep(step);         this.newStep = step.name;         this.$refs.newStep.focus();     },     toggleComplete: function(step){         step.completed = false;     },     completeAll: function(){         this.steps.forEach(function(step){             step.completed = true;         });     },     clearComplete: function(){         // this.steps = [];k         this.steps = this.steps.filter(function(step){             return !step.completed;         });     } }, computed: {     inProcess: function(){         return this.steps.filter(function(step){             if (step.completed == false) return step;         })     },     processed: function(){         return this.steps.filter(function(step){             if (step.completed == true) return step;         })     },     completions: function(){         return this.steps.filter(function(step){             return step.completed;         });     },     remaings: function(){         return this.steps.filter(function(step){             return !step.completed;         });     } }

   
   

   })

可否为模块添加name属性查看更具体的debug message？

大概看了下应该是这里错了

data必须是个函数也就是应该写成

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