Element: [Bug Report] el-table v-loading Failed to resolve directive: loading

[razr001]

Element UI version

2.12.0

OS/Browsers version

win10/chrome 76

Vue version

2.6.10

Reproduction Link

https://codepen.io/razr001/pen/eYYVxrQ

Steps to reproduce

set el-table v-loading

What is Expected?

show loading

What is actually happening?

Failed to resolve directive: loading

[razr001]

main.js add
import { Loading } from 'element-ui';
Vue.use(Loading.directive);