记录chrome扩展开发时调用vue-i18n的一些问题和解决方法

环境

• vue: ^3.3.4
• vue-i18n: ^9.2.2
• vite: ^4.4.8

---

错误1

Uncaught (in promise) EvalError: Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self' 'wasm-unsafe-eval' 'inline-speculation-rules' http://localhost:* http://127.0.0.1:*".

原因

• https://vue-i18n.intlify.dev/guide/advanced/optimization.html#improve-performance-and-reduce-bundle-size-with-runtime-build-only
  

解决方案1：
方案来源：

• https://github.com/intlify/bundle-tools/issues/23#issuecomment-893353418
• https://github.com/intlify/bundle-tools/tree/main/packages/vue-i18n-loader#why-do-we-need-to-require-the-configuration

这个方法虽然可以解决报错问题，但是t函数还是无法正常使用，如果只是简单的语言调用可以使用tm函数

<script setup>
import {useI18n} from 'vue-i18n'
const {tm} = useI18n()
</script>

<template>
	<div>
		{{ tm('test') }}
	</div>
</template>

// 在createI18n时，增加一个导出方法，来简单解决`t`函数不能正常用的问题
export function ts(key: string, arg: object) {
  const {tm,locale} = useI18n()
  let _text = tm(key);
  let reg;
  for(let LKey in arg){
    reg = new RegExp('\{\\s*?'+LKey+'\\s*?\}','g');
    // @ts-ignore
    _text = _text.replace(reg, arg[LKey])
  }
  return _text;
}

// 使用：ts('test', {key1: 'key1Val', key2: 'key2Val'})

解决方案2：
方案来源：

• https://www.cnblogs.com/guangzan/p/14999292.html
• https://vue-i18n.intlify.dev/guide/advanced/optimization.html#vite-plugin-vue-i18n

使用 vite 插件 vite-plugin-vue-i18n 处理这个问题

npm i --save-dev @intlify/vite-plugin-vue-i18n

# 包文档： https://www.npmjs.com/package/@intlify/vite-plugin-vue-i18n (停更)
# 包作者提醒：
# This plugin support until Vite 3. If you would like to use on Vite 4, please use @intlify/unplugin-vue-i18n

npm i --save-dev @intlify/unplugin-vue-i18n
# 包文档： https://www.npmjs.com/package/@intlify/unplugin-vue-i18n

vue-i18n官方文档示例：

错误2

You are running the esm-bundler build of vue-i18n. It is recommended to configure your bundler to explicitly replace feature flag globals with boolean literals to get proper tree-shaking in the final bundle.

解决方案：

// vite.config.ts
resolve: {
  alias: {
    // ...
    'vue-i18n': 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js'
  },
},

其他相关文献：

• 【vue-i18n踩坑】The message format compilation is not supported in this build.
• 【VUE】vue-i18n: Uncaught SyntaxError: Not available in legacy mode
• vue-i18n-next bundle includes new Function()
• Interpolations in production mode does not work
• vue3 with vue-i18n-next only works with unsafe-eval CSP header