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Angular 9's Best Hidden Feature: Strict Template Checking

Bachi
Originally published at auth0.com ・1 min read

We have likely read about some of the benefits of the Ivy compiler and runtime. It's faster. It makes smaller bundle sizes. And it has many other great new features that are introduced in Angular 9. Yet one of the most compelling and useful features is one we don't hear as often.

What if Angular could find bugs in our existing code? Hidden bugs that we may not notice. Subtle bugs that could cause problems? Angular 9 and the Ivy compiler do just that.

The new feature is known as strict template checking. Angular has been checking expressions and bindings within the templates of our applications for years. But with Angular 9, it finds and reports more errors than ever. It is pretty cool that we could have bugs in our templates right now, and this new feature reports them to us so we can fix them.

Seeing is believing, so let's see some examples. We'll kick things off using Angular 8, and we'll progress to Angular 9. We'll also adjust some compilation settings. These differences help us see where Angular 9 can detect additional errors that Angular 8 could not.

Read on 📖

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