1.多加一层判断letanimal =cat || nullif(animal){}2.断言方式（animal as Cat）3. ?.4.报错类型设为any

在el-table标签直接加border是没的效果的，应该这样写border=“true”

<router-link :to="para.url" slot="left" v-if="para.url!=undefined">// v-if="para.url!=undefined"一定要加上，因为先渲染的页面再获取到url的值<mt-buttonicon="back" >返回</mt-button></router-li...

啦啦啦

1.axioshttps://cdn.bootcss.com/axios/0.18.0/axios.min.js2.swiperhttps://unpkg.com/swiper@5.3.8/css/swiper.csshttps://unpkg.com/swiper@5.3.8/js/swiper.jshttps://cdn.jsdelivr.net/npm/vue-awesome-swiper/

mostthe@MostdeMacBook-Air ~ % touch .bash_profilemostthe@MostdeMacBook-Air ~ % open -e .bash_profilemostthe@MostdeMacBook-Air ~ % source ~/.bash_profilemostthe@MostdeMacBook-Air ~ % mongoopen -e .bash