vite配置了legacy打包后在safari 15.1中仍无法使用

[zanxiaoyu]

Describe the bug

vite配置了legacy打包后在safari 15.1中仍无法使用
控制台报错.at() is undefined，at方法safari最低支持15.4，我本来想使用legacy兼容一下，结果打包后inex.html虽然有nomodule的script，但是在15.1的safari应该是支持module的，所以还是无法使用，在跳转页面时就会报错 .at() is undefined。
这要怎么解决？另外请问vite打包什么时候能支持es5？

Reproduction

none

Steps to reproduce

No response

System Info

Safari浏览器
版本15.1(17612.2.9.1.20)

Used Package Manager

npm

Logs

No response

Validations

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[sapphi-red]

Vite doesn't inject any polyfills for modern bundles. Also there isn't a way to make Safari 15.1 to use legacy bundles. (#6922)

The current intended way is to use modernPolyfills option.
https://github.com/vitejs/vite/tree/main/packages/plugin-legacy#modernpolyfills