安装

npm install typescript ts-loader --save-dev

vue.config.js

configureWebpack: {
  resolve: {extensions: [".ts", ".tsx", ".js", ".json"]},
  module: {
    rules: [
      { test: /\.ts$/, loader: "ts-loader" },
    ]
  }
}

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "noImplicitAny": true,
    "removeComments": true,
    "preserveConstEnums": true,
    "sourceMap": false
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules","**/*.spec.ts"]
}

报错

Syntax Error: TypeError: loaderContext.getOptions is not a function

原因：

ts-loader 9 不支持 webpack 4

换一个版本

npm install ts-loader@8.2.0

参考：
https://github.com/TypeStrong/ts-loader/issues/595