vue life cycle:

        vue life cycle:

       1. beforeCreate () Create the component;
        2. Created () created;
        3. beforeMounte () before the assembly is linked to the CD;
        4. Mounted () to complete the assembly linked to the CD;
        5. The beforeUpdate () component before update;
        6. The Updated ( ) updated after assembly;
        7. the beforeDestory () destroyed before assembly;
        post 8. destoryed () component destroyed;