refactor(ts): better DX for typescript support (#5079)

Breaking change : `build.useForkTsChecker` renamed to `build.typescript.typeCheck`

.eslintignore

@@ -9,6 +9,7 @@ coverage
 ## cofeescript
 examples/coffeescript/pages/index.vue
 examples/pug-stylus-coffee/
+examples/typescript-eslint/
 # Packages
 
 # vue-app

distributions/nuxt-ts/bin/nuxt-ts.js

@@ -1,21 +1,8 @@
 #!/usr/bin/env node
 
-const { resolve } = require('path')
-
-// Globally indicate we are running in ts mode
-process.env.NUXT_TS = 'true'
-
-const nuxtCommands = ['dev', 'build', 'generate', 'start']
-const rootDir = (process.argv[2] && !nuxtCommands.includes(process.argv[2])) ? process.argv[2] : process.cwd()
-const tsConfigPath = resolve(rootDir, 'tsconfig.json')
-
 const suffix = require('../package.json').name.includes('-edge') ? '-edge' : ''
-
-const errorHandler = (error) => {
+require('@nuxt/cli' + suffix).run()
+  .catch((error) => {
     require('consola').fatal(error)
     process.exit(2)
-}
-
-require('@nuxt/typescript' + suffix).setup(tsConfigPath).then(() => {
-  require('@nuxt/cli' + suffix).run().catch(errorHandler)
-}).catch(errorHandler)
+  })

examples/pm2-typescript/ecosystem.config.js

@@ -1,8 +1,8 @@
 module.exports = {
   apps: [
     {
-      name: 'pm2-nuxt-ts',
-      script: './node_modules/.bin/nuxt-ts',
+      name: 'pm2-nuxt-typescript',
+      script: './node_modules/.bin/nuxt',
       args: 'start',
       instances: 2,
       exec_mode: 'cluster',

examples/pm2-typescript/package.json

@@ -2,17 +2,16 @@
   "version": "1.0.0",
   "private": true,
   "dependencies": {
-    "nuxt-ts": "latest",
+    "nuxt": "latest",
     "vue-property-decorator": "^7.3.0"
   },
   "scripts": {
-    "dev": "nuxt-ts",
-    "build": "nuxt-ts build",
-    "start": "nuxt-ts start",
-    "generate": "nuxt-ts generate",
-    "lint": "tslint --project ."
+    "dev": "nuxt",
+    "build": "nuxt build",
+    "start": "nuxt start",
+    "generate": "nuxt generate"
   },
   "devDependencies": {
-    "tslint-config-standard": "^8.0.1"
+    "@nuxt/typescript": "latest"
   }
 }

examples/pm2-typescript/tsconfig.json

@@ -1,10 +1 @@
-{
-  "extends": "@nuxt/typescript",
-  "compilerOptions": {
-    "baseUrl": ".",
-    "types": [
-      "@types/node",
-      "@nuxt/vue-app"
-    ]
-  }
-}
+{}

examples/pm2-typescript/tslint.json

@@ -1,9 +0,0 @@
-{
-  "defaultSeverity": "error",
-  "extends": [
-    "tslint-config-standard"
-  ],
-  "rules": {
-    "prefer-const": true
-  }
-}

examples/typescript-eslint/.eslintrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+  plugins: ['@typescript-eslint'],
+  parserOptions: {
+    parser: '@typescript-eslint/parser'
+  },
+  extends: [
+    '@nuxtjs'
+  ]
+}

examples/typescript-eslint/.gitignore

@@ -0,0 +1,15 @@
+# Dependencies
+node_modules
+
+# Logs
+*.log*
+
+# IDE
+.idea
+.vscode
+
+# Nuxt build
+.nuxt
+
+# Nuxt generate
+dist

examples/typescript-eslint/README.md

@@ -0,0 +1,33 @@
+# Nuxt with TypeScript & ESLint example
+
+Use `yarn lint` or `npm run lint` to lint your TypeScript project !
+
+## Why ESLint and not TSLint ?
+
+See https://eslint.org/blog/2019/01/future-typescript-eslint
+
+## 
+
+## VSCode settings
+
+If you're using VSCode, we recommend using these settings :
+
+```json
+"eslint.autoFixOnSave": true,
+"eslint.validate": [
+  {
+    "language": "javascript",
+    "autoFix": true
+  },
+  {
+    "language": "typescript",
+    "autoFix": true
+  },
+  {
+    "language": "vue",
+    "autoFix": true
+  }
+]
+```
+
+It will lint your `.js`, `.ts` & `.vue` files whenever you're saving them.

examples/typescript-eslint/nuxt.config.ts

@@ -0,0 +1 @@
+export default {}

examples/typescript-eslint/package.json

@@ -0,0 +1,30 @@
+{
+  "version": "1.0.0",
+  "private": true,
+  "dependencies": {
+    "nuxt": "latest",
+    "vue-property-decorator": "^7.3.0"
+  },
+  "scripts": {
+    "dev": "nuxt",
+    "build": "nuxt build",
+    "start": "nuxt start",
+    "generate": "nuxt generate",
+    "lint": "eslint --ext .ts,.js,.vue --ignore-path .gitignore .",
+    "lint:fix": "yarn lint --fix",
+    "post-update": "yarn upgrade --latest"
+  },
+  "devDependencies": {
+    "@nuxt/typescript": "latest",
+    "@nuxtjs/eslint-config": "latest",
+    "@typescript-eslint/eslint-plugin": "^1.4.2",
+    "eslint": "^5.14.1",
+    "eslint-config-standard": "^12.0.0",
+    "eslint-plugin-import": "^2.16.0",
+    "eslint-plugin-jest": "^22.3.0",
+    "eslint-plugin-node": "^8.0.1",
+    "eslint-plugin-promise": "^4.0.1",
+    "eslint-plugin-standard": "^4.0.0",
+    "eslint-plugin-vue": "^5.2.2"
+  }
+}

examples/typescript-eslint/pages/index.vue

@@ -0,0 +1,14 @@
+<template>
+  <div>
+    <h1>{{ title }}</h1>
+  </div>
+</template>
+
+<script lang="ts">
+import { Component, Vue } from 'vue-property-decorator'
+
+@Component
+export default class Home extends Vue {
+  title = 'TypeScript + ESLint example'
+}
+</script>

examples/typescript-eslint/tsconfig.json

@@ -0,0 +1 @@
+{}

examples/typescript-tsx/package.json

@@ -3,20 +3,18 @@
   "private": true,
   "version": "1.0.0",
   "scripts": {
-    "dev": "nuxt-ts",
-    "build": "nuxt-ts build",
-    "start": "nuxt-ts start",
-    "generate": "nuxt-ts generate",
-    "lint": "tslint --project .",
-    "lint:fix": "tslint --project . --fix",
+    "dev": "nuxt",
+    "build": "nuxt build",
+    "start": "nuxt start",
+    "generate": "nuxt generate",
     "post-update": "yarn upgrade --latest",
     "watch:css": "tcm components -w"
   },
   "dependencies": {
-    "nuxt-ts": "latest"
+    "nuxt": "latest"
   },
   "devDependencies": {
-    "tslint-config-standard": "^8.0.1",
+    "@nuxt/typescript": "latest",
     "typed-css-modules": "^0.3.7"
   }
 }

examples/typescript-tsx/tsconfig.json

@@ -1,8 +1,6 @@
 {
-  "extends": "@nuxt/typescript",
   "compilerOptions": {
-    "baseUrl": ".",
-    "noImplicitThis": true,
-    "types": ["@types/node", "@nuxt/vue-app"]
+    "jsx": "preserve",
+    "noImplicitThis": true
   }
 }

examples/typescript-tsx/tslint.json

@@ -1,7 +0,0 @@
-{
-  "defaultSeverity": "error",
-  "extends": ["tslint-config-standard"],
-  "rules": {
-    "prefer-const": true
-  }
-}

examples/typescript-vuex/package.json

@@ -3,20 +3,19 @@
   "private": true,
   "dependencies": {
     "axios": "^0.18.0",
-    "nuxt-ts": "latest",
+    "nuxt": "latest",
     "tachyons": "^4.11.1",
     "vue-property-decorator": "^7.3.0",
     "vuex-class": "^0.3.1"
   },
   "scripts": {
-    "dev": "nuxt-ts",
-    "build": "nuxt-ts build",
-    "start": "nuxt-ts start",
-    "generate": "nuxt-ts generate",
-    "lint": "tslint --project .",
+    "dev": "nuxt",
+    "build": "nuxt build",
+    "start": "nuxt start",
+    "generate": "nuxt generate",
     "post-update": "yarn upgrade --latest"
   },
   "devDependencies": {
-    "tslint-config-standard": "^8.0.1"
+    "@nuxt/typescript": "latest"
   }
 }

examples/typescript-vuex/tsconfig.json

@@ -1,11 +1 @@
-{
-  "extends": "@nuxt/typescript",
-  "compilerOptions": {
-    "baseUrl": ".",
-    "noImplicitAny": false,
-    "types": [
-      "@types/node",
-      "@nuxt/vue-app"
-    ]
-  }
-}
+{}

examples/typescript-vuex/tslint.json

@@ -1,9 +0,0 @@
-{
-  "defaultSeverity": "error",
-  "extends": [
-    "tslint-config-standard"
-  ],
-  "rules": {
-    "prefer-const": true
-  }
-}

examples/typescript/package.json

@@ -2,18 +2,17 @@
   "version": "1.0.0",
   "private": true,
   "dependencies": {
-    "nuxt-ts": "latest",
+    "nuxt": "latest",
     "vue-property-decorator": "^7.3.0"
   },
   "scripts": {
-    "dev": "nuxt-ts",
-    "build": "nuxt-ts build",
-    "start": "nuxt-ts start",
-    "generate": "nuxt-ts generate",
-    "lint": "tslint --project .",
+    "dev": "nuxt",
+    "build": "nuxt build",
+    "start": "nuxt start",
+    "generate": "nuxt generate",
     "post-update": "yarn upgrade --latest"
   },
   "devDependencies": {
-    "tslint-config-standard": "^8.0.1"
+    "@nuxt/typescript": "latest"
   }
 }

examples/typescript/tsconfig.json

@@ -1,10 +1 @@
-{
-  "extends": "@nuxt/typescript",
-  "compilerOptions": {
-    "baseUrl": ".",
-    "types": [
-      "@types/node",
-      "@nuxt/vue-app"
-    ]
-  }
-}
+{}

examples/typescript/tslint.json

@@ -1,9 +0,0 @@
-{
-  "defaultSeverity": "error",
-  "extends": [
-    "tslint-config-standard"
-  ],
-  "rules": {
-    "prefer-const": true
-  }
-}

packages/cli/src/command.js

@@ -1,9 +1,12 @@
+
+import path from 'path'
 import consola from 'consola'
 import minimist from 'minimist'
 import { name, version } from '../package.json'
 import { loadNuxtConfig, forceExit } from './utils'
 import { indent, foldLines, colorize } from './utils/formatting'
 import { startSpaces, optionSpaces, forceExitTimeout } from './utils/constants'
+import { detectAndSetupTypeScriptSupport } from './utils/typescript'
 import * as imports from './imports'
 
 export default class NuxtCommand {
@@ -73,7 +76,10 @@ export default class NuxtCommand {
     return this._parsedArgv
   }
 
-  async getNuxtConfig(extraOptions) {
+  async getNuxtConfig(extraOptions = {}) {
+    const rootDir = path.resolve(this.argv._[0] || '.')
+    extraOptions._typescript = await detectAndSetupTypeScriptSupport(rootDir, { transpileOnly: this.cmd.name === 'start' })
+
     const config = await loadNuxtConfig(this.argv)
     const options = Object.assign(config, extraOptions)
 

packages/cli/src/utils/index.js

@@ -1,5 +1,4 @@
 import path from 'path'
-import { existsSync } from 'fs'
 import consola from 'consola'
 import esm from 'esm'
 import exit from 'exit'
@@ -11,14 +10,14 @@ import prettyBytes from 'pretty-bytes'
 import env from 'std-env'
 import { successBox, warningBox } from './formatting'
 
-export const requireModule = process.env.NUXT_TS ? require : esm(module, {
+const esmOptions = {
   cache: false,
   cjs: {
     cache: true,
     vars: true,
     namedExports: true
   }
-})
+}
 
 export const eventsMapping = {
   add: { icon: '+', color: 'green', action: 'Created' },
@@ -26,18 +25,23 @@ export const eventsMapping = {
   unlink: { icon: '-', color: 'red', action: 'Removed' }
 }
 
-const getRootDir = argv => path.resolve(argv._[0] || '.')
-const getNuxtConfigFile = argv => path.resolve(getRootDir(argv), argv['config-file'])
-
 export async function loadNuxtConfig(argv) {
-  const rootDir = getRootDir(argv)
-  const nuxtConfigFile = getNuxtConfigFile(argv)
-
+  const rootDir = path.resolve(argv._[0] || '.')
+  let nuxtConfigFile
   let options = {}
 
-  if (existsSync(nuxtConfigFile)) {
-    delete require.cache[nuxtConfigFile]
-    options = requireModule(nuxtConfigFile) || {}
+  try {
+    nuxtConfigFile = require.resolve(path.resolve(rootDir, argv['config-file']))
+  } catch (e) {
+    if (e.code !== 'MODULE_NOT_FOUND') {
+      throw (e)
+    } else if (argv['config-file'] !== defaultNuxtConfigFile) {
+      consola.fatal('Could not load config file: ' + argv['config-file'])
+    }
+  }
+
+  if (nuxtConfigFile) {
+    options = (nuxtConfigFile.endsWith('.ts') ? require(nuxtConfigFile) : esm(module, esmOptions)(nuxtConfigFile)) || {}
     if (options.default) {
       options = options.default
     }
@@ -56,9 +60,8 @@ export async function loadNuxtConfig(argv) {
 
     // Keep _nuxtConfigFile for watching
     options._nuxtConfigFile = nuxtConfigFile
-  } else if (argv['config-file'] !== defaultNuxtConfigFile) {
-    consola.fatal('Could not load config file: ' + argv['config-file'])
   }
+
   if (typeof options.rootDir !== 'string') {
     options.rootDir = rootDir
   }

packages/cli/src/utils/typescript.js

@@ -0,0 +1,38 @@
+import path from 'path'
+import { existsSync } from 'fs'
+import chalk from 'chalk'
+import consola from 'consola'
+import { warningBox } from './formatting'
+
+const dependencyNotFoundMessage =
+`Please install @nuxt/typescript and rerun the command
+
+${chalk.bold('Using yarn')}
+yarn add -D @nuxt/typescript
+
+${chalk.bold('Using npm')}
+npm install -D @nuxt/typescript`
+
+export async function detectAndSetupTypeScriptSupport(rootDir, options = {}) {
+  const tsConfigPath = path.resolve(rootDir, 'tsconfig.json')
+
+  if (!existsSync(tsConfigPath)) {
+    return false
+  }
+
+  consola.info(`${chalk.bold.blue('tsconfig.json')} found, enabling TypeScript runtime support`)
+
+  try {
+    const { setup } = require('@nuxt/typescript')
+    await setup(tsConfigPath, options)
+  } catch (e) {
+    if (e.code === 'MODULE_NOT_FOUND') {
+      process.stdout.write(warningBox(dependencyNotFoundMessage, chalk.yellow('An external official dependency is needed to enable TS support')))
+      process.exit(1)
+    } else {
+      throw (e)
+    }
+  }
+
+  return true
+}

packages/cli/test/unit/__snapshots__/command.test.js.snap

@@ -14,7 +14,7 @@ exports[`cli/command builds help text 1`] = `
     --universal, -u    Launch in Universal
                        mode (default)
     --config-file, -c  Path to Nuxt.js
-                       config file (default: nuxt.config.js)
+                       config file (default: nuxt.config)
     --modern, -m       Build/Start app for
                        modern browsers, e.g. server, client and
                        false

packages/config/src/config/build.js

@@ -54,7 +54,9 @@ export default () => ({
     },
     vueStyle: {}
   },
-  useForkTsChecker: process.env.NUXT_TS === 'true',
+  typescript: {
+    typeCheck: true
+  },
   styleResources: {},
   plugins: [],
   terser: {},

packages/config/src/config/index.js

@@ -10,7 +10,7 @@ import router from './router'
 import server from './server'
 import cli from './cli'
 
-export const defaultNuxtConfigFile = `nuxt.config${process.env.NUXT_TS === 'true' ? '.ts' : '.js'}`
+export const defaultNuxtConfigFile = 'nuxt.config'
 
 export function getDefaultNuxtConfig(options = {}) {
   if (!options.env) {

packages/config/src/options.js

@@ -84,7 +84,7 @@ export function getNuxtConfig(_options) {
 
   // Default value for _nuxtConfigFile
   if (!options._nuxtConfigFile) {
-    options._nuxtConfigFile = path.resolve(options.rootDir, defaultNuxtConfigFile)
+    options._nuxtConfigFile = path.resolve(options.rootDir, `${defaultNuxtConfigFile}.js`)
   }
 
   // Watch for _nuxtConfigFile changes

packages/config/test/__snapshots__/options.test.js.snap

@@ -131,7 +131,9 @@ Object {
     "templates": Array [],
     "terser": Object {},
     "transpile": Array [],
-    "useForkTsChecker": false,
+    "typescript": Object {
+      "typeCheck": true,
+    },
     "watch": Array [],
   },
   "buildDir": "/var/nuxt/test/.nuxt",

packages/config/test/config/__snapshots__/index.test.js.snap

@@ -121,7 +121,9 @@ Object {
     "templates": Array [],
     "terser": Object {},
     "transpile": Array [],
-    "useForkTsChecker": false,
+    "typescript": Object {
+      "typeCheck": true,
+    },
     "watch": Array [],
   },
   "buildDir": ".nuxt",
@@ -450,7 +452,9 @@ Object {
     "templates": Array [],
     "terser": Object {},
     "transpile": Array [],
-    "useForkTsChecker": false,
+    "typescript": Object {
+      "typeCheck": true,
+    },
     "watch": Array [],
   },
   "buildDir": ".nuxt",

packages/typescript/package.json

@@ -4,8 +4,7 @@
   "repository": "nuxt/nuxt.js",
   "license": "MIT",
   "files": [
-    "dist",
-    "tsconfig.json"
+    "dist"
   ],
   "main": "dist/typescript.js",
   "dependencies": {
@@ -22,15 +21,11 @@
     "@types/webpack-bundle-analyzer": "^2.13.1",
     "@types/webpack-dev-middleware": "^2.0.2",
     "@types/webpack-hot-middleware": "^2.16.5",
-    "chalk": "^2.4.2",
-    "consola": "^2.5.6",
-    "enquirer": "^2.3.0",
     "fork-ts-checker-webpack-plugin": "^1.0.0",
     "fs-extra": "^7.0.1",
-    "std-env": "^2.2.1",
+    "lodash": "^4.17.11",
     "ts-loader": "^5.3.3",
     "ts-node": "^8.0.3",
-    "tslint": "^5.14.0",
     "typescript": "^3.3.3333"
   },
   "publishConfig": {

packages/typescript/src/index.js

@@ -1,53 +1,57 @@
-import chalk from 'chalk'
-import consola from 'consola'
-import env from 'std-env'
-import { prompt } from 'enquirer'
-import { existsSync, writeJSON } from 'fs-extra'
+import { readJSON, writeJSON } from 'fs-extra'
 import { register } from 'ts-node'
+import defaultsDeep from 'lodash/defaultsDeep'
 
-async function generateTsConfig(tsConfigPath) {
-  const configToExtend = '@nuxt/typescript'
-  await writeJSON(tsConfigPath, {
-    extends: configToExtend,
+export const defaultTsJsonConfig = {
   compilerOptions: {
+    target: 'esnext',
+    module: 'esnext',
+    moduleResolution: 'node',
+    lib: [
+      'esnext',
+      'esnext.asynciterable',
+      'dom'
+    ],
+    esModuleInterop: true,
+    experimentalDecorators: true,
+    allowJs: true,
+    sourceMap: true,
+    strict: true,
+    noImplicitAny: false,
+    noEmit: true,
     baseUrl: '.',
+    paths: {
+      '~/*': [
+        './*'
+      ],
+      '@/*': [
+        './*'
+      ]
+    },
     types: [
       '@types/node',
       '@nuxt/vue-app'
     ]
   }
-  }, { spaces: 2 })
-  consola.info(`Extending ${chalk.bold.blue(`node_modules/${configToExtend}/tsconfig.json`)}`)
-  consola.success(`Generated successfully at ${chalk.bold.green(tsConfigPath)}`)
 }
 
 let _setup = false
 
-export async function setup(tsConfigPath) {
+export async function setup(tsConfigPath, options = {}) {
   if (_setup) {
     return
   }
   _setup = true
 
-  if (!existsSync(tsConfigPath)) {
-    const { confirmGeneration } = await prompt({
-      type: 'confirm',
-      name: 'confirmGeneration',
-      message: `${chalk.bold.blue(tsConfigPath)} is missing, generate it ?`,
-      initial: true,
-      skip: env.minimal
-    })
+  const config = await readJSON(tsConfigPath)
+  await writeJSON(tsConfigPath, defaultsDeep(config, defaultTsJsonConfig), { spaces: 2 })
 
-    if (confirmGeneration) {
-      await generateTsConfig(tsConfigPath)
-    }
-  }
   // https://github.com/TypeStrong/ts-node
   register({
     project: tsConfigPath,
     compilerOptions: {
       module: 'commonjs'
     },
-    transpileOnly: process.argv[2] === 'start'
+    ...options
   })
 }

packages/typescript/test/setup.test.js

@@ -1,12 +1,9 @@
 import { resolve } from 'path'
-import { exists, mkdirp, readJSON, remove } from 'fs-extra'
+import { mkdirp, readJSON, remove, writeJSON } from 'fs-extra'
 import { register } from 'ts-node'
-import { setup as setupTypeScript } from '@nuxt/typescript'
+import { defaultTsJsonConfig, setup as setupTypeScript } from '@nuxt/typescript'
 
 jest.mock('ts-node')
-jest.mock('enquirer', () => ({
-  prompt: jest.fn(() => ({ confirmGeneration: true }))
-}))
 
 describe('typescript setup', () => {
   const rootDir = 'tmp'
@@ -15,21 +12,12 @@ describe('typescript setup', () => {
   beforeAll(async () => {
     // We're assuming that rootDir provided to setupTypeScript is existing so we create the tested one
     await mkdirp(rootDir)
+    await writeJSON(tsConfigPath, {})
     await setupTypeScript(tsConfigPath)
   })
 
-  test('tsconfig.json has been generated if missing', async () => {
-    expect(await exists(tsConfigPath)).toBe(true)
-    expect(await readJSON(tsConfigPath)).toEqual({
-      extends: '@nuxt/typescript',
-      compilerOptions: {
-        baseUrl: '.',
-        types: [
-          '@types/node',
-          '@nuxt/vue-app'
-        ]
-      }
-    })
+  test('tsconfig.json has been updated with defaults', async () => {
+    expect(await readJSON(tsConfigPath)).toEqual(defaultTsJsonConfig)
   })
 
   test('ts-node has been registered once', async () => {
@@ -41,13 +29,12 @@ describe('typescript setup', () => {
       project: tsConfigPath,
       compilerOptions: {
         module: 'commonjs'
-      },
-      transpileOnly: false
+      }
     })
   })
 
   afterAll(async () => {
     // Clean workspace by removing the temporary folder (and the generated tsconfig.json at the same time)
-    await remove(tsConfigPath)
+    await remove(rootDir)
   })
 })

packages/typescript/tsconfig.json

@@ -1,30 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "esnext",
-    "module": "esnext",
-    "moduleResolution": "node",
-    "lib": [
-      "esnext",
-      "esnext.asynciterable",
-      "dom"
-    ],
-    "esModuleInterop": true,
-    "experimentalDecorators": true,
-    "jsx": "preserve",
-    "sourceMap": true,
-    "strict": true,
-    "noImplicitAny": true,
-    "noEmit": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "baseUrl": ".",
-    "paths": {
-      "~/*": [
-        "./*"
-      ],
-      "@/*": [
-        "./*"
-      ]
-    }
-  }
-}

packages/webpack/src/config/client.js

@@ -1,5 +1,4 @@
 import path from 'path'
-import fs from 'fs'
 import querystring from 'querystring'
 import consola from 'consola'
 import webpack from 'webpack'
@@ -77,7 +76,7 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
 
   plugins() {
     const plugins = super.plugins()
-    const { buildOptions, options: { appTemplatePath, buildDir, rootDir, modern } } = this.buildContext
+    const { buildOptions, options: { appTemplatePath, buildDir, modern, rootDir, _typescript } } = this.buildContext
 
     // Generate output HTML for SSR
     if (buildOptions.ssr) {
@@ -140,21 +139,16 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
 
     // TypeScript type checker
     // Only performs once per client compilation and only if `ts-loader` checker is not used (transpileOnly: true)
-    if (!this.isModern && this.loaders.ts.transpileOnly && buildOptions.useForkTsChecker) {
-      const forkTsCheckerResolvedPath = this.buildContext.nuxt.resolver.resolveModule('fork-ts-checker-webpack-plugin')
-      if (forkTsCheckerResolvedPath) {
-        const ForkTsCheckerWebpackPlugin = require(forkTsCheckerResolvedPath)
+    if (_typescript && buildOptions.typescript && buildOptions.typescript.typeCheck && !this.isModern && this.loaders.ts.transpileOnly) {
+      // We assume that "_typescript" being truthy means @nuxt/typescript is installed <=> fork-ts-checker-webpack-plugin is installed
+      const ForkTsCheckerWebpackPlugin = require(this.buildContext.nuxt.resolver.resolveModule('fork-ts-checker-webpack-plugin'))
       plugins.push(new ForkTsCheckerWebpackPlugin(Object.assign({
         vue: true,
         tsconfig: path.resolve(rootDir, 'tsconfig.json'),
-          // https://github.com/Realytics/fork-ts-checker-webpack-plugin#options - tslint: boolean | string - So we set it false if file not found
-          tslint: (tslintPath => fs.existsSync(tslintPath) && tslintPath)(path.resolve(rootDir, 'tslint.json')),
+        tslint: false, // We recommend using ESLint so we set this option to `false` by default
         formatter: 'codeframe',
         logger: consola
-        }, buildOptions.useForkTsChecker)))
-      } else {
-        consola.warn('You need to install `fork-ts-checker-webpack-plugin` as devDependency to enable TypeScript type checking !')
-      }
+      }, buildOptions.typescript.typeCheck)))
     }
 
     return plugins

test/fixtures/typescript/tsconfig.json

@@ -1,8 +1,30 @@
 {
-  "extends": "@nuxt/typescript",
   "compilerOptions": {
-    "baseUrl": ".",
+    "target": "esnext",
+    "module": "esnext",
+    "moduleResolution": "node",
+    "lib": [
+      "esnext",
+      "esnext.asynciterable",
+      "dom"
+    ],
+    "esModuleInterop": true,
+    "experimentalDecorators": true,
+    "allowJs": true,
+    "jsx": "preserve",
+    "sourceMap": true,
+    "strict": true,
     "noImplicitAny": false,
+    "noEmit": true,
+    "baseUrl": ".",
+    "paths": {
+      "~/*": [
+        "./*"
+      ],
+      "@/*": [
+        "./*"
+      ]
+    },
     "types": [
       "@types/node",
       "@nuxt/vue-app"

test/unit/typescript.modern.test.js

@@ -8,7 +8,7 @@ describe('typescript modern', () => {
 
   beforeAll(async () => {
     const options = await loadFixture('typescript')
-    nuxt = new Nuxt(Object.assign(options, { modern: true, build: { useForkTsChecker: true } }))
+    nuxt = new Nuxt(Object.assign(options, { modern: true, _typescript: true }))
     await new Builder(nuxt, BundleBuilder).build()
   })
 

yarn.lock

@@ -2184,7 +2184,7 @@ ansi-align@^3.0.0:
   dependencies:
     string-width "^3.0.0"
 
-ansi-colors@^3.0.0, ansi-colors@^3.2.1:
+ansi-colors@^3.0.0:
   version "3.2.4"
   resolved "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.4.tgz#e3a3da4bfbae6c86a9c285625de124a234026fbf"
   integrity sha512-hHUXGagefjN2iRrID63xckIvotOXOojhQKWIPUZ4mNUZ9nLZW+7FMNoE1lOkEhNWYsx/7ysGIuJYCiMAA9FnrA==
@@ -4284,13 +4284,6 @@ enhanced-resolve@^4.0.0, enhanced-resolve@^4.1.0:
     memory-fs "^0.4.0"
     tapable "^1.0.0"
 
-enquirer@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.npmjs.org/enquirer/-/enquirer-2.3.0.tgz#c362c9d84984ebe854def63caaf12983a16af552"
-  integrity sha512-RNGUbRVlfnjmpxV+Ed+7CGu0rg3MK7MmlW+DW0v7V2zdAUBC1s4BxCRiIAozbYB2UJ+q4D+8tW9UFb11kF72/g==
-  dependencies:
-    ansi-colors "^3.2.1"
-
 entities@^1.1.1, entities@~1.1.1:
   version "1.1.2"
   resolved "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz#bdfa735299664dfafd34529ed4f8522a275fea56"