How to do in vite config when i have multi pages and dont want plugins config effect all entries.

[ganker-vito]

background:
i have double pages in config.

plugins: [
// such as pwa
pwa() // -> this will effect all html, in a.html and b.html . but i dont want this plugin effect in a.html. how can i do in vite config?
],
build: {
rollupOptions: {
input: {
a: path.resolve(__dirname, 'a.html'),
b: path.resolve(__dirname, 'b.html')
},
}
}