Recently ready to develop an H5 sharing service, found the new version of Vue CLI4.0 is a lot of pit
First: My local @vue CLI version is 4.5.11:

 
Later, due to the tight schedule of the project, I directly reduced the local CLI version to 3.0, but because of my mistake, I made a mistake when creating the Vue project, but don’t worry:

Just find the local user directory C disk to find a.vuerc file deleted on the OK