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Angular News Wednesday, June 6

Why It’s Time to Say Goodbye to Angular Template-Driven Forms

  • Lets compare this with the same form built using reactive forms: – With this approach we can see immediately the structure of our form in a very clean way, without rooting around the template file.
  • Lets compare this with the reactive approach: – We can access the form in our component at any point and we dont need to use template variables to get its values.
  • For example: – Custom validatorWhereas with reactive forms we can use the function directly: – Custom validatorAnother important thing that you should pay attention to is that unlike reactive forms, template-driven forms are asynchronous.
  • Two waybinding – Template-driven forms expose a two-way binding option which breaks the one-way data flow and immutability principles and makes your code bug-prone and hard to reason about.
  • Testability – When using template-driven forms, we must create a component in order to test our forms and use one of the async testing helpers that Angular provides.

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Why It’s Time to Say Goodbye to Angular Template-Driven Forms

3 Useful TypeScript Tips for Angular

  • Although Visual Studio Code has auto-import feature, I don’t like my source files been polluted by multiple lines of imports – just for the purpose of strong typing.
  • By using namespace, we can eliminate the needs to import interfaces files.
  • d stands for declaration file in Typescript (more explanation here).
  • Look at the code below: – – If you don’t find declaration, you may create a d file yourself (e.g. util.d.ts) and copy the code above into it.
  • For example, Typescript will throw error Unreachable code detected in this following code: – – You can suppress that by using comment – – Find out more details here: Typescript 2.6 release – – Of course, I will suggest you to always try fix the error before ignoring it!

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3 Useful TypeScript Tips for Angular

What’s New in Angular 6? – DZone Web Dev

  • As part of this release, a new version has updated the core framework packages (@angular/core, @angular/common, and @angular/compiler, etc.), the Angular CLI, and Angular Material + CDK.
  • ng update – – is the new CLI command that will analyze your package.json and gives you a recommendation regarding the updating of the packages for your application.
  • CLI + Material Starter Templates – – The next addition is angular material starter templates with angular CLI.
  • RxJS v6 comes with several major changes along with a backward compatibility package that will keep your application working.
  • Angular CLI – – CLI v6 now has support for workspaces containing multiple projects or libraries.

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What’s New in Angular 6? – DZone Web Dev

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