Use typescript configuration vue.config file

[huanent]

What problem does this feature solve?

Use typescript configration vue.config file

What does the proposed API look like?

import { ProjectOptions } from "@vue/cli-service";

export default function() {
return {
outputDir: "build"
} as ProjectOptions;
}

[haoqunjiang]

Currently, you can use the following snippet for type hints:

/** @type {import('@vue/cli-service').ProjectOptions */
module.exports = {
  
}

[huanent]

Thanks , it would be great if you could support using .ts in the future like webpack .
https://webpack.js.org/configuration/configuration-languages/

[haoqunjiang]

#2138
#4477