Reason: element UI in .Babel is repeated
Solution: remove duplicate code in babel.config.js
Before modification
module.exports = {
"presets": [
"@vue/cli-plugin-babel/preset"
],
"plugins": [
[
"component",
{
"libraryName": "element-ui",
"styleLibraryName": "theme-chalk"
}
],
[
"component",
{
"libraryName": "element-ui",
"styleLibraryName": "theme-chalk"
}
]
]
}
After modification
module.exports = {
"presets": [
"@vue/cli-plugin-babel/preset"
],
"plugins": [
[
"component",
{
"libraryName": "element-ui",
"styleLibraryName": "theme-chalk"
}
]
]
}