slot的使用
1.slot
https://www.w3cplus.com/vue/vue-slot.html
2.ref
https://www.cnblogs.com/xumqfaith/p/7743387.html
3生命周期
https://www.w3cplus.com/vue/vue-instances-and-life-cycles.html
4.vue2.0学习笔记
https://www.w3cplus.com/blog/vue?page=1
参考资料用于做ppt的资料