1、项目报错如下
2、原因：
异步显示的数据先显示vuex中的初始数据，再显示请求的数据，一开始在vuex中state中的初始数据为空，报错是因为在显示初始数据的时候报错
3、解决：避免在没有数据的时候显示解析（有数据才解析）
有数据的时候div才存在，用v-if控制一下
5、总结：表达式有一层表达式(a)，二层表达式(a.b)，三层表达式(a.b.c)，
当表达式三层的时候就有问题：比如a开始为空，a.b:的结果为undefined, a.b.c你再取的时候就会报错了
Vue（踩坑）vue.esm.js?efeb:628 [Vue warn]: Error in render: "TypeError: Cannot read property '0' of undefined" found in
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Vue（踩坑）vue.esm.js?efeb:628 [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined" found in
Vue（踩坑）vue.esm.js?efeb:628 [Vue warn]: Error in render: "TypeError: Cannot read property '0' of undefined" found in
at src/components/ShopList/ShopList.vue at s">
vuex(报错）_vue.esm.js?efeb:628 [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined" found in ---> at src/components/ShopList/ShopList.vue at s
【Vue-bug】vue.esm.js?a026:628 [Vue warn]: Error in render: "TypeError: Cannot read property 'avatar' of undefined"
at src/App.vue">
[Vue warn]: Error in render: "TypeError: Cannot read property 'matched' of undefined" found in at src/App.vue
vue.esm.js?efeb:628 [Vue warn]: Failed to mount component: template or render function not defined. found in ---> at src/App.vue
[Vue warn]: Error in render: "TypeError: Cannot read property 'slice' of undefined" found in
【vue踩坑记录】3、“Error in render: "TypeError: Cannot read property '0' of undefined"”渲染错误问题
【vue踩坑记录】3、“Error in render: "TypeError: Cannot read property '0' of undefined"”渲染错误问题
[Vue warn]: Error in render: "TypeError: Cannot read property '0' of undefined、vuejs路由使用的问题Error in render function