vue生命周期小记

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/vue/2.1.3/vue.js"></script>
</head>
<body>

<div id="app">
     <p>{{ message }}</p>
</div>

<script type="text/javascript">
    
  var app = new Vue({
      el: '#app',
      data: {
          message : "this is why we play!" 
      },
       beforeCreate: function () {
           console.group('beforeCreate 创建前状态===============》');
           console.log("%c%s", "color:red" , "el     : " + this.$el);  //undefined
               console.log("%c%s", "color:red","data   : " + this.$data);  //undefined 
               console.log("%c%s", "color:red","message: " + this.message) //undefined
        },
        created: function () {
            console.group('created 创建完毕状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el); 	//undefined
		    console.log("%c%s", "color:red","data   : " + this.$data);  //已被初始化 
		    console.log("%c%s", "color:red","message: " + this.message);//已被初始化
        },
        beforeMount: function () {
            console.group('beforeMount 挂载前状态===============》');
            console.log("%c%s", "color:red","el     : " + (this.$el));  //已被初始化
            console.log(this.$el);										// <p>{{ message }}</p>	
		    console.log("%c%s", "color:red","data   : " + this.$data);  //已被初始化  
		    console.log("%c%s", "color:red","message: " + this.message);//已被初始化  
        },
        mounted: function () {
            console.group('mounted 挂载结束状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el);    //已被初始化
            console.log(this.$el);   									// <p>this is why we play!</p> 
		    console.log("%c%s", "color:red","data   : " + this.$data);  //已被初始化
		    console.log("%c%s", "color:red","message: " + this.message);//已被初始化 
        },
        beforeUpdate: function () {
            console.group('beforeUpdate 更新前状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el);
            console.log(this.$el);   
		    console.log("%c%s", "color:red","data   : " + this.$data); 
		    console.log("%c%s", "color:red","message: " + this.message); 
        },
        updated: function () {
            console.group('updated 更新完成状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el);
            console.log(this.$el); 
		    console.log("%c%s", "color:red","data   : " + this.$data); 
		    console.log("%c%s", "color:red","message: " + this.message); 
        },
        beforeDestroy: function () {
            console.group('beforeDestroy 销毁前状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el);
            console.log(this.$el);    
			console.log("%c%s", "color:red","data   : " + this.$data); 
			console.log("%c%s", "color:red","message: " + this.message); 
        },
        destroyed: function () {
            console.group('destroyed 销毁完成状态===============》');
            console.log("%c%s", "color:red","el     : " + this.$el);
            console.log(this.$el);  
			console.log("%c%s", "color:red","data   : " + this.$data); 
			console.log("%c%s", "color:red","message: " + this.message)
        }
    })
</script>
</body>
</html>
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