feat: support Vite 8 bundledDev mode for virtual modules

[rlorenzo]

Use an inline import with order:'pre' in transformIndexHtml so Vite's HTML pipeline picks up the inspector module before bundling.

Also, reset appendTo regex lastIndex before test() to prevent skipped matches when a global-flag regex is used.

Testing

I built and added this to my Vite 8 project using npm link to test the plugin code locally. I was able to launch Vue Inspector on my SPA pages in full bundle mode. I also tested backward compatibility with Vite 7, and it still worked.

[Copilot]

Pull request overview

Adds support for Vite 8 experimental.bundledDev by switching inspector injection from transformIndexHtml to module-level injection for the HTML entry scripts (so the inspector still loads when /@id/ URLs aren’t served from the bundled dev output).

Changes:

• Detect experimental.bundledDev in configResolved and collect HTML entry module targets.
• Parse HTML inputs (including MPA via build.rollupOptions.input) to find <script type="module" src="..."> entrypoints.
• Inject the inspector loader import via transform() for those entry modules, and disable transformIndexHtml injection in bundledDev mode.

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[Copilot]

Pull request overview

Adds support for Vite 8’s experimental.bundledDev mode by switching inspector injection away from transformIndexHtml and into transformed HTML entry modules so the virtual module import is bundled correctly in bundled dev.

Changes:

• Track bundled dev mode via configResolved and disable transformIndexHtml injection when active.
• Parse HTML entry files (including MPA via rollupOptions.input) to discover module entrypoints for injection.
• Inject the inspector loader import via the transform hook for detected entry modules when bundled dev is enabled.

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[Copilot]

Pull request overview

Adds Vite 8 experimental.bundledDev compatibility by switching inspector injection from transformIndexHtml (which relies on /@id/ URLs) to transform() injection into HTML entry modules when bundled dev bundling is enabled.

Changes:

• Detect experimental.bundledDev in configResolved and disable transformIndexHtml injection in that mode.
• Parse HTML entry files (including MPA via build.rollupOptions.input) to find module entry scripts and cache their resolved file paths.
• Inject the inspector loader import in transform() when the transformed module matches an HTML entry module (bundledDev mode), while keeping appendTo behavior intact.

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[Copilot]

Pull request overview

Adds support for Vite 8’s experimental bundledDev mode by changing how the inspector client is injected when /@id/ URLs aren’t available from the Rolldown memory bundle.

Changes:

• Detect experimental.bundledDev in configResolved and switch injection strategy accordingly.
• Parse HTML entry files (including MPA inputs) to find module entry scripts and inject via transform() into those entry modules.
• Disable transformIndexHtml injection when bundledDev is active.

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[Copilot]

Pull request overview

Updates the core Vite plugin to support Vite 8’s experimental.bundledDev mode by switching inspector injection from HTML tag injection (transformIndexHtml) to module-level injection (transform) for HTML entry modules, since /@id/ URLs aren’t served in bundledDev.

Changes:

• Detect experimental.bundledDev in configResolved and disable transformIndexHtml injection when active.
• Parse configured HTML entrypoints (build.rollupOptions.input, falling back to index.html) to discover module entry scripts.
• Inject the inspector import via transform() for discovered HTML entry modules in bundledDev mode.

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[rlorenzo]

@webfansplz Any chance this can get integrated? Right now, I am removing this plugin from my app that uses Full Bundle mode for Vite 8, but I would love to add it back. Very useful.

[webfansplz]

Not sure about this, since Vite8 uses Rolldown, maybe we should replace it with better option?

[rlorenzo]

@webfansplz I reworked the patch so it is much simpler and still works on Vite 8's full bundle mode.

[Copilot]

Pull request overview

Adds Vite 8 “bundledDev” compatibility for loading the inspector virtual module earlier in Vite’s HTML pipeline, and hardens appendTo handling when a global/sticky regex is provided.

Changes:

• Reset appendTo RegExp lastIndex before test() to avoid skipped matches with /g (or /y) regexes.
• Switch transformIndexHtml to an { order: 'pre', handler } form and inject an inline module import so Vite’s HTML processing sees the inspector module before bundling.

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