javascript - Use import to introduce js files in vue, the result is undefined

Question

The file cannot be imported, it is undefined, use require, and the result from the console is the screenshot below

Solution! ! !

Answer 1

The js file exported by import is undefined, that’s because the ec2015 syntax converter is not installed, because ec2015 syntax is not compatible with all browsers
Installation method: $ npm install --save-dev babel-preset-es2015
Then create a new one .babelrc file, write:
{
presets: ['es2015']
}
Just re-npm run dev