VUE学习之路(二)---全局API之VUE的生命周期(钩子函数)

Vue一共有10个生命周期函数,我们可以利用这些函数在Vue的每个阶段都进行操作数据或者改变内容。

直接上官网的一张图

有两个函数在以后组件的内容讲解。

10个生命周期函数:

beforeCreate:function(){
                console.log('1-beforeCreate 初始化之后');
            },
            created:function(){
                console.log('2-created 创建完成');
            },
            beforeMount:function(){
                console.log('3-beforeMount 挂载之前');
            },
            mounted:function(){
                console.log('4-mounted 被创建');
            },
            beforeUpdate:function(){
                console.log('5-beforeUpdate 数据更新前');
            },
            updated:function(){
                console.log('6-updated 被更新后');
            },
            activated:function(){
                console.log('7-activated');
            },
            deactivated:function(){
                console.log('8-deactivated');
            },
            beforeDestroy:function(){
                console.log('9-beforeDestroy 销毁之前');
            },
            destroyed:function(){
                console.log('10-destroyed 销毁之后')
            }

生命周期的展示:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>生命周期</title>
    <script type="text/javascript" src="https://unpkg.com/[email protected]/dist/vue.js" ></script>
</head>
<body>
    <h1>生命周期</h1>
    <hr>
    <div id="app">
        {{ count }}
        <p><button @click="add">add</button></p>
    </div>
    <button onclick="app.$destroy()">销毁</button>

    

    <script>
        var app = new Vue({
            el : '#app',
            data : {
                count : 1
            },
            methods : {
                add : function(){
                    this.count++;
                }                
            },
            beforeCreate:function(){
                    console.log('1-beforeCreate 初始化之前');
                },
                created:function(){
                    console.log('2-created 创建完成');、
                    //在项目中比较常用的是在这里进行创建动画,然后在第四步销毁动画,恢复正常页面。
                    //例如正常页面加载时候出现的那个loging
                },
                beforeMount:function(){
                    console.log('3-beforeMount 挂载之前');
                },
                mounted:function(){
                    console.log('4-mounted 被创建');
                },
                beforeUpdate:function(){
                    console.log('5-beforeUpdate 数据更新前');
                },
                updated:function(){
                    console.log('6-updated 被更新后');
                },

                //78在控制台不输出,他俩是有特殊用途的,在路由和组件时会用到
                activated:function(){
                    console.log('7-activated');
                },
                deactivated:function(){
                    console.log('8-deactivated');
                },

                beforeDestroy:function(){
                    console.log('9-beforeDestroy 销毁之前');
                },
                destroyed:function(){
                    console.log('10-destroyed 销毁之后')
                }
        })
       
    </script>
</body>
</html>

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转载自blog.csdn.net/ferrysoul/article/details/81430028