Migrating from AngularJS to Angular

Migrating from AngularJS to Angular

AngularJS was an incredibly popular framework, but with the advent of Angular, it has become somewhat outdated. This blog provides insight into angular development and highlights some best practices that can be employed for migration from AngularJS to Angular.

The sections below highlight some key practices followed by the Angular web development community to provide the migration a flawless process. • Using Modern Javascript flavour The latest ES6 or Typescript are essentially the ones which are highly reliable.

Introducing Typescript into project enables type safety and object-oriented patterns. To prepare for the Angular migration you just need to convert remaining JavaScript files to Typescript.

• Using Components Components provide clarity in a grouping of templates/logic, stricter scope isolation, and input/output communication. The Components were introduced in AngularJS 1.5 in response to the trend towards component-based web application development.

• Bridge the Gap To reduce the boilerplate code and make its purpose clearer Angular takes advantages of decorators. Using decorators like Typescript or Babel eases the AngularJS code and makes migration to Angular flawless.

• Using third-party libraries Another area during migrating is the use of third-party libraries and components. Most of the libraries without direct ties such as UI Router work fine with Angular.

• Develop your Strategy It is good to have a strategy in place before beginning the migration of a large application.

The points to be considered are:

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Time frame – Gradual migration is preferred wherein existing deliverables for the customers are not hampered.

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Order of approach – It is preferred downgrading Angular components as opposed to upgrading AngularJS components. Downgrading employs the downgrade function while upgrading requires the creation of a whole wrapper component.

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Migrate or rewrite – In many of these cases, the effort to refactor and migrate would be similar to that of doing a total rewrite. For large sections of existing code, refactor and migrate by rewriting them in the latest Angular.

Source : Upgrading from AngularJS to Angular