项目环境
// 1. npm ls vite
├─┬ @vitejs/[email protected]
│ └── [email protected] deduped
├─┬ @vitejs/[email protected]
│ └── [email protected] deduped
├─┬ [email protected]
│ └── [email protected] deduped
├─┬ [email protected]
│ └── [email protected] deduped
└── [email protected]
// 2.npm ls pdfjs-dist
└── [email protected]
// 3.node -v
v18.18.0
- 报错1：
Top-level await is not available in the configured target environment ("chrome87", "edge88", "es2020", "firefox78", "safari14" + 2 overrides)
node_modules/pdfjs-dist/build/pdf.mjs:17349:53:
17349 │ /******/ __webpack_exports__ = globalThis.pdfjsLib = await (globalThis.pdfjsLibPromise = __webpack_exports__);
- 原因：vite 不支持顶级的 async/await 语法，需要安装插件做兼容
- 解决方案：
vite.config.ts 安装并引入 topLevelAwait
npm install vite-plugin-top-level-await -D
// vite.config.ts 文件
// 解决 vite build打包报错Top-level await is not available
import topLevelAwait from 'vite-plugin-top-level-await'
export default ({ mode }: any) => {
return defineConfig({
plugins: [
topLevelAwait({
promiseExportName: '__tla',
promiseImportName: (i) => `__tla_${i}`
})
],
})
}
- 报错2：
Uncaught (in promise) Error: No "GlobalWorkerOptions.workerSrc" specified.
- 原因：pdfjs-dist 包需要用到 webWorker 线程做大量的计算，需要全局引入 pdfjsWorker
- 解决方案：从 pdfjs-dist 导入 pdfjsWorker 并挂载到 window 变量上
import * as pdfjsLib from 'pdfjs-dist'
import * as pdfjsWorker from 'pdfjs-dist/build/pdf.worker.mjs'
(window as any).pdfjsWorker = pdfjsWorker
- 报错3：
找不到模块“pdfjs-dist/build/pdf.worker.mjs”或其相应的类型声明。ts(2307)
-
原因：如果是
<script setup lang="ts">模块式，引入 pdfjsWorker 需要申明模块 -
解决方案：创建模块声明文件 并 声明 pdfjsWorker
// env.d.ts
/// <reference types="vite/client" />
declare module 'pdfjs-dist/build/pdf.worker.mjs';