Why does my exclude configuration work in the development environment but not in the test environment

[hahakaola]

I am currently using vite+vue3 to build the project and only want to do rem adaptation for mobile, this is my code:
exclude: function (file) {
return file.indexOf('m/') === -1
}
However, after the packaging release, both pc and mobile have made rem adaptation。What am I supposed to do？