vue生命周期以及,created与mounted的区别

 

 

 

浏览器渲染过程  

• 构建DOM树
• 构建css规则树,根据执行顺序解析js文件。
• 构建渲染树Render Tree
• 渲染树布局layout
• 渲染树绘制

 

 

beforeCreate(){
    console.log('beforecreate:',document.getElementById('first'))//null
    console.log('data:',this.text);//undefined
    this.sayHello();//error:not a function
},
created(){
    console.log('create:',document.getElementById('first'))//null
    console.log('data:',this.text);//this.text
    this.sayHello();//this.sayHello()
},
beforeMount(){
    console.log('beforeMount:',document.getElementById('first'))//null
    console.log('data:',this.text);//this.text
    this.sayHello();//this.sayHello()
},
mounted(){
    console.log('mounted:',document.getElementById('first'))//

    console.log('data:',this.text);//this.text
    this.sayHello();//this.sayHello()
}

 

 

生命周期	是否获取dom节点	是否可以获取data	是否获取methods
beforeCreate	否	否	否
created	否	是	是
beforeMount	否	是	是
mounted	是	是	是