vue.config.js设置问题

[clark-cui]

Version

4.2.3

Reproduction link

https://github.com/clark-cui/vue3-template.git

Environment info

  System:
    OS: Windows 10 10.0.18362
    CPU: (6) x64 Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
  Binaries:
    Node: 11.10.0 - C:\softwares\nodejs\node.EXE
    Yarn: Not Found
    npm: 6.7.0 - C:\softwares\nodejs\npm.CMD
  Browsers:
    Edge: 44.18362.449.0
  npmPackages:
    @vue/babel-helper-vue-jsx-merge-props:  1.0.0
    @vue/babel-plugin-transform-vue-jsx:  1.1.2
    @vue/babel-preset-app:  4.2.3
    @vue/babel-preset-jsx:  1.1.2
    @vue/babel-sugar-functional-vue:  1.1.2
    @vue/babel-sugar-inject-h:  1.1.2
    @vue/babel-sugar-v-model:  1.1.2
    @vue/babel-sugar-v-on:  1.1.2
    @vue/cli-overlay:  4.2.3
    @vue/cli-plugin-babel: ~4.2.0 => 4.2.3
    @vue/cli-plugin-router: ~4.2.0 => 4.2.3
    @vue/cli-plugin-typescript: ~4.2.0 => 4.2.3
    @vue/cli-plugin-vuex: ~4.2.0 => 4.2.3
    @vue/cli-service: ~4.2.0 => 4.2.3
    @vue/cli-shared-utils:  4.2.3
    @vue/component-compiler-utils:  3.1.1
    @vue/preload-webpack-plugin:  1.1.1
    @vue/web-component-wrapper:  1.2.0
    typescript: ~3.7.5 => 3.7.5
    vue: ^2.6.11 => 2.6.11
    vue-class-component: ^7.2.2 => 7.2.3
    vue-hot-reload-api:  2.3.4
    vue-loader:  15.9.0
    vue-property-decorator: ^8.3.0 => 8.4.0
    vue-router: ^3.1.5 => 3.1.6
    vue-style-loader:  4.1.2
    vue-template-compiler: ^2.6.11 => 2.6.11
    vue-template-es2015-compiler:  1.9.1
    vuex: ^3.1.2 => 3.1.2
  npmGlobalPackages:
    @vue/cli: Not Found

Steps to reproduce

Docs write:

vue.config.js is an optional config file that will be automatically loaded by @vue/cli-service if it's present in your project root (next to package.json).

But vuecli can't load vue.config.ts,the option in this typescript file is useless.change the file from typescript to javascript can solve this problem.

What is expected?

vuecli can load vue.config.ts.(typescript file)

What is actually happening?

vuecli just can load vue.config.js(javacript file)

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[haoqunjiang]

Duplicate of #2138