Module not found: Error: Can't resolve '@babel/runtime/helpers/classCallCheck' and Module not found: Error: Can't resolve '@babel/runtime/helpers/defineProperty'

These two mistakes are really just one mistake， This is because the following file @babel/runtime cannot be found。

I am getting this error:

ERROR in ./src/main.js                                                                           
Module not found: Error: Can't resolve '@babel/runtime/helpers/classCallCheck' in 'C:UsersASUSDesktopvuewebpack-study2src'                                                               @./src/main.js 1:0-68 13:2-17
                                                                                              
ERROR in ./src/main.js                                                                           
Module not found: Error: Can't resolve '@babel/runtime/helpers/defineProperty' in 'C:UsersASUSDesktopvuewebpack-study2src'                                                              @@ ./src/main.js 2:0-68 17:0-15

So what we're trying to figure out is why can't we find those two files， because we did not install @babel/runtime。