A Step-by-Step Guide on Updating Your Angular 7 Project to Angular Version

I am facing a challenge with my Angular material project, which is currently outdated and needs to be updated to version 13.

Running npm outdated revealed the following results:

https://i.stack.imgur.com/ayjDu.png

The Angular update guide suggests upgrading one major version at a time and provides the following commands:

cmd /C "set "NG_DISABLE_VERSION_CHECK=1" && npx @angular/cli@8 update @angular/cli@8 @angular/core@8"

However, when executing the above command, I encounter the following errors:

  • Package "nativescript-angular" has an incompatible peer dependency to "typescript" (requires "~3.1.1", would install "3.5.3").
  • Package "codelyzer" has multiple incompatible peer dependencies with various Angular modules.
  • Attempting to manually update these packages has proven to be complex due to interdependent dependencies.

I am determined to successfully upgrade to Angular 13 by making necessary code changes, but I am unsure of the correct approach to address this issue.

UPDATE

Even using --force during the update process results in a different error:

https://i.stack.imgur.com/et7jz.png

Executing the command below triggers further issues:

ng update --all --force

https://i.stack.imgur.com/TiCRP.png

angulartypescript

Answer №1

When embarking on the migration journey from an ancient Angular 7 to version 13, I quickly realized it was not as straightforward as anticipated by previous responses.

To tackle this challenge, I opted to initiate a fresh Angular project using the latest version and then proceeded to manually transfer key elements from the outdated version:

  • src/app (components, pipes, modules, etc)
  • src/models
  • src/services

Please note that this list serves as a general guideline and may require modifications based on your specific folder structure and angular version.

I then utilized ng -s command or leveraged the typescript language service to pinpoint any syntax errors or missing components/entities (such as adding components to the modules, resolving import issues, etc).

By employing tools like WinMerge, one can compare directories and files between both Angular versions as well as scrutinize package.json to identify any uninstalled packages.

https://i.stack.imgur.com/flPmY.png https://i.stack.imgur.com/ZRZXq.png

I ensured seamless merging of tsconfig files and app.modules.ts files while relying on error notifications to steer me in the right direction.

In certain instances within the demo application, I resorted to using 'any' type for expedited resolutions, although my preference remains with strong types whenever feasible.

Though at times tedious, I find solace in having ownership of my code and prefer tackling challenges head-on rather than navigating through an endless maze of dependencies tied to antiquated npm packages (some of which have undergone name changes).

Answer №2

Follow the instructions in the documentation one by one.

To upgrade, consider using the --force option to bypass any incompatible peer dependencies. Test your app after upgrading - if it works, great! If not, identify and update problematic packages.

Remember to repeat this process for each major version change of Angular.

If you encounter a second error, try running the command with additional options: --force or --legacy-peer-deps

Did these suggestions help resolve your issue?

Answer №3

To update all packages without worrying about dependencies, you can either use ng update --all --force or 

npm install --save --legacy-peer-deps
. This method will skip any dependency checks and ensure that all packages are updated as needed. While this approach is generally not recommended, I had to resort to it because other suggestions were not effective in my case.

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