In the next version of Bun Bun gets compile-time feature flag support with dead-code elimination

If you use these feature() checks outside of if statements or ternary expressions, you'll get an error at build-time. This makes it harder to mistakenly include code that you meant to remove.

@bunjavascript @alistaiir This is a macro system. I don't understand why you want to include one macro system that is too weak to do this and another macro system that is too weak to do anything else.

@bunjavascript @alistaiir great you went for a function instead of a directive 😜

@bunjavascript @alistaiir Yes

@bunjavascript @alistaiir ifdef

@bunjavascript @alistaiir Bun linter / formatted when? please

@bunjavascript @alistaiir Oh shit that's actually kinda nice

@bunjavascript @alistaiir yoooooo its like Rust feature I love it

@bunjavascript @alistaiir Well done work bun

@bunjavascript @alistaiir Its like pythons, __debug__?

@bunjavascript @alistaiir Bun is getting rusty

@bunjavascript @alistaiir This is great! What’s the best way to use the same API for runtime? vs compile time

@bunjavascript @alistaiir lolll this is the most Anthropic Claude Code themed feature yet

@bunjavascript @alistaiir Please add a functionality to analyze exported functions that are not used anywhere

@bunjavascript @alistaiir This is really nice

@bunjavascript @alistaiir Dead code elimination at compile time means smaller bundles without the runtime overhead. Perfect for feature-gating in production builds.

@bunjavascript @alistaiir Just amazing

@bunjavascript @alistaiir Feature flags are underrated until you scale execution paths. Dead-code elimination just makes the whole flow cleaner.

@bunjavascript @alistaiir this is such a smart feature. compile-time dce is a huge win.

@bunjavascript @alistaiir nice

@bunjavascript @alistaiir it's called compile time constants with minification

@bunjavascript @alistaiir thank you bun for endorsing my lazy code habits 😅

@bunjavascript @alistaiir not "use flag: my-feature"??

@bunjavascript @alistaiir Yes please

@bunjavascript @alistaiir Shouldn’t it be handled by macros that are already supported by Bun?

@bunjavascript @alistaiir This is an awesome feature, much needed for library authors. Is Bun good for writing universal libraries (Node, Deno, Bun, CF, Vercel, React Native, etc.)?

@bunjavascript @alistaiir @grok what can this be leveraged for mainly

@bunjavascript @alistaiir Excited for it

@bunjavascript @alistaiir It's actually good , tbh I love bun

@bunjavascript @alistaiir What the difference with define ? #define" target="_blank" rel="nofollow noopener">bun.com/docs/bundler#d…

@bunjavascript @alistaiir Implements Putout natively, please.

@bunjavascript @alistaiir Can you explain this feature? @AskPerplexity

@bunjavascript @alistaiir @grok give me a few good example use cases for this

@bunjavascript @alistaiir #ifdef SUPER_SECRET #endif