插件打字稿：@rollup/插件打字稿 TS2307：找不到模块'./App.svelte'或其相应的类型声明

Question

我的瘦项目有以下问题

main.ts

import App from './App.svelte';
const app = new App({
target: document.body,
});
export default app;

第一行返回警告

插件类型脚本：@rollup/Plugin-typescript TS2307:找不到模块'/"App.svelte"或其相应的类型声明。

但我的配置看起来不错，我确实安装了"@tsconfig/svelte": "^2.0.1",并将其添加到了我的tsconfig 中

rollup.config.js

import svelte from 'rollup-plugin-svelte';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import typescript from '@rollup/plugin-typescript';
import css from 'rollup-plugin-css-only';
import preprocess from 'svelte-preprocess';
import alias from '@rollup/plugin-alias';
const production = !process.env.ROLLUP_WATCH;
function serve() {
let server;
function toExit() {
if (server) server.kill(0);
}
return {
writeBundle() {
if (server) return;
server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
stdio: ['ignore', 'inherit', 'inherit'],
shell: true,
});
process.on('SIGTERM', toExit);
process.on('exit', toExit);
},
};
}
export default {
input: 'src/main.ts',
output: {
sourcemap: true,
format: 'iife',
name: 'app',
file: 'public/build/bundle.js',
},
plugins: [
svelte({
preprocess: preprocess({
sourceMap: !production,
postcss: true,
}),
compilerOptions: {
// enable run-time checks when not in production
dev: !production,
},
}),
// we'll extract any component CSS out into
// a separate file - better for performance
css({ output: 'bundle.css' }),
alias({
resolve: ['.svelte', '.ts'], //optional, by default this will just look for .js files or folders
entries: [
{ find: '@assets', replacement: 'src/assets/' },
{ find: '@components', replacement: 'src/components/' },
{ find: '@libs', replacement: 'src/libs/' },
{ find: '@routes', replacement: 'src/routes/' },
{ find: '@models', replacement: 'src/models/' },
{ find: '@constants', replacement: 'src/constants/' },
{ find: '@services', replacement: 'src/services/' },
],
}),
// If you have external dependencies installed from
// npm, you'll most likely need these plugins. In
// some cases you'll need additional configuration -
// consult the documentation for details:
// https://github.com/rollup/plugins/tree/master/packages/commonjs
resolve({
browser: true,
dedupe: ['svelte'],
}),
commonjs(),
typescript({
sourceMap: !production,
inlineSources: !production,
resolveJsonModule: true,
}),
// In dev mode, call `npm run start` once
// the bundle has been generated
!production && serve(),
// Watch the `public` directory and refresh the
// browser on changes when not in production
!production && livereload('public'),
// If we're building for production (npm run build
// instead of npm run dev), minify
production && terser(),
],
watch: {
clearScreen: false,
},
};

tsconfig.json

{
"extends": "@tsconfig/svelte/tsconfig.json",
"include": ["src/**/*", "**/*.config.js"],
"exclude": ["node_modules/*", "__sapper__/*", "public/*"],
"compilerOptions": {
"baseUrl": "./",
"strict": true,
"forceConsistentCasingInFileNames": true,
"paths": {
"@assets/*": ["src/assets/*"],
"@components/*": ["src/components/*"],
"@libs/*": ["src/libs/*"],
"@routes/*": ["src/routes/*"],
"@models/*": ["src/models/*"],
"@constants/*": ["src/constants/*"],
"@services/*": ["src/services/*"]
}
}
}

我可以在.svelte文件中导入.svelte，但在.ts文件中不能导入.svelte

Answer 1

@tsconfig/svelte1.x版本确实包含"types": ["svelte"]。这确保了TypeScript找到了环境Svelte类型定义，该定义告诉TypeScript Svelte导入是"；好"；。但同时，它关闭了所有其他环境类型定义，如Jest中的定义，这导致了混乱。因此，在版本2中，types字段被删除。现在需要您自己添加环境定义或对其的引用。

在src文件夹中创建一个带有的global.d.ts文件

/// <reference types="svelte" />

这基本上与之前tsconfig.json中的"types": ["svelte"]相同，并且告诉TS在哪里找到环境类型定义。

更新：如果@tsconfig/svelte版本2出现此错误，请检查您的TS版本。如果是4.5，那么很可能是TS中的一个错误，它在某些情况下破坏了像这样的三斜杠类型。要么降级到TS 4.4.x，要么将Svelte升级到最新版本，该版本包含一个修复程序以使其重新工作。