Most Angular devs use Dependency Injection every day without fully understanding it. Here's what changed the game for me 👇 ✅ Services decorated with @Injectable are your modular units — keep business logic OUT of components ✅ The injector hierarchy (App → Route → Component) controls instance scope — one wrong level = shared state bugs ✅ inject() over constructor injection = cleaner, more composable code ✅ InjectionTokens unlock tree-shaking — unused code gets dropped from your bundle automatically ✅ skipSelf and host give you precision when the default resolution isn't enough DI in Angular is genuinely one of the most well-engineered parts of the framework. The more you understand it, the more intentional your architecture becomes. Save this if you're levelling up your Angular skills. 🚀 #Angular #TypeScript #Frontend #WebDev #SoftwareEngineering #DependencyInjection

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