There are many architectural differences between these versions, so some of the app code will have to be rewritten. Migrating from Ionic 1 to Ionic 4.0 involves moving from AngularJS (aka Angular 1) to Angular 7+. Migrating from Ionic 1.0 to Ionic 4.0 Ionic 1.0 to Ionic 4.0: What’s Involved? To help with these markup changes, we've released a TSLint-based Migration Tool, which detects issues and can even fix some of them automatically.

These changes have all been made to follow the Custom Elements spec, and have been documented in a dedicated file on GitHub. Since v4 moved to Custom Elements, there's been a significant change to the markup for each component. Services should include ,įor a detailed explanation of lazy loading in V4 project, check out the Angular navigation guide.Copy any Angular services from src/providers to src/app/services.

Generate a new project using the blank starter (see Starting an App).

We suggest the following general process when migrating an existing application from Ionic 3 to 4: For a complete list of breaking changes from Ionic 3 to Ionic 4, please refer to the breaking changes document in the Ionic core repo.

Upgrading from media shout 4 to 6