angular 8 migration guide

When should I update my angular library?
If your goal is to make your library compatible with Angular versions 7 and 8, you should not update your lib at all —except for peerDependencies in package.json. In general, the most efficient plan is for libraries to adopt a 6-month major version schedule and bump the major version after each Angular update.
How to update angular to V15?
Angular v15 supports TypeScript version 4.8 or later. Read further In the application's project directory, run ng update @angular/core@15 @angular/cli@15 to update your application to Angular v15. In v15, the Angular compiler prefixes @keyframes in CSS with the component's scope.
How do I migrate angular V16 to a standalone API?
You can try this new build setup by updating your angular.json: To support developers transitioning their apps to standalone APIs, Angular v16 includes migration schematics and a standalone migration guide. These tools dramatically reduce the effort required to move your code to standalone components, directives, and pipes.
How do I migrate to angular 9?
You can optionally pass the --create-commits (or -C) flag to ng update commands to create a git commit per individual migration. Run cmd /C "set "NG_DISABLE_VERSION_CHECK=1" && npx @angular/cli@9 update @angular/cli@9 @angular/core@9" which should bring you to version 9 of Angular.

Prerequisiteslink

Before using the schematic, please ensure that the project: 1. Is using Angular 15.2.0 or later. 2. Builds without any compilation errors. 3. Is on a clean Git branch and all work is saved. angular.io

Migrations Stepslink

The migration process is composed of three steps. You'll have to run it multiple times and check manually that the project builds and behaves as expected. Run the migration in the order listed below, verifying that your code builds and runs between each step: 1. Run ng g @angular/core:standaloneand select "Convert all components, directives and pip

After The Migrationlink

Congratulations, your application has been converted to standalone ????. These are some optional follow-up steps you may want to take now: 1. Find and remove any remaining NgModule declarations: since the "Remove unnecessary NgModules" stepcannot remove all modules automatically, you may have to remove the remaining declarations manually. 2. Run the

Migration Modeslink

The migration has the following modes: 1. Convert declarations to standalone. 2. Remove unnecessary NgModules. 3. Switch to standalone bootstrapping API.You should run these migrations in the order given. angular.io

Common Problemslink

Some common problems that may prevent the schematic from working correctly include: 1. Compilation errors - if the project has compilation errors, Angular cannot analyze and migrate it correctly. 2. Files not included in a tsconfig - the schematic determines which files to migrate by analyzing your project's tsconfig.jsonfiles. The schematic exclud

Limitationslink

Due to the size and complexity of the migration, there are some cases that the schematic cannot handle: 1. Because unit tests are not ahead-of-time (AoT) compiled, importsadded to components in unit tests might not be entirely correct. 2. The schematic relies on direct calls to Angular APIs. The schematic cannot recognize custom wrappers around Ang

Angular 8 to Angular 9 Application Migration Angular 8 upgrade steps

Angular 7 to Angular 8 Application Migration Angular 8 upgrade steps

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