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Vite's build warns that your main chunk is over 500 kB, and the whole app downloads before a single page renders.
What you'll have at the end
A production build whose main chunk sits under Vite's 500 kB warning line, with every deferred feature split into its own chunk that only downloads once an on-demand import() actually runs for it.
You need
A Vite project whose production build already completes without errors, where at least one on-screen feature runs code that imports a sizeable dependency only that one feature actually needs.
Not covered
Restructuring the project into multiple HTML entry points for a true multi-page build, or changing what a server-rendered app sends over the wire; this only covers splitting one page's own JavaScript by when a feature actually runs.
Leans on
Checked 22 Aug 2026
Part of the Vite cookbook