ionic-app-upgrades

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Translated

Guides the agent through upgrading an Ionic Framework app to a newer major version. Supports upgrades from Ionic 4 through 8, including multi-version jumps. Covers framework-specific migration steps for Angular, React, and Vue, component breaking changes, CSS variable updates, and browser support changes. Do not use for Capacitor version upgrades (use capacitor-app-upgrades instead), for plugin library upgrades, or for non-Ionic UI frameworks.

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npx skill4agent add capawesome-team/skills ionic-app-upgrades

Tags

Translated version includes tags in frontmatter
ionic-frameworkmobile-app-upgradeframework-migrationcross-platform-developmentapp-version-management

SKILL.md Content

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Ionic App Upgrade

Upgrade an Ionic Framework app to a newer major version (4 to 5, 5 to 6, 6 to 7, or 7 to 8).

Prerequisites

Target VersionAngularReactVue
58.2+16+N/A
612+17+3.0.6+
714+17+3.0.6+
816+17+3.0.6+

Procedures

Step 1: Detect Current Version

Read 
@ionic/angular
, 
@ionic/react
, or 
@ionic/vue
version from 
package.json
(
dependencies
or 
devDependencies
). Determine the current major version and which framework is in use (Angular, React, Vue, or Core/Standalone).
Ask the user for the target version. Default to the latest (8) if not specified.

Step 2: Execute Upgrade

For each major version jump between the current and target version, apply the corresponding upgrade guide sequentially:
Current to TargetReference
4 to 5
references/upgrade-v4-to-v5.md
5 to 6
references/upgrade-v5-to-v6.md
6 to 7
references/upgrade-v6-to-v7.md
7 to 8
references/upgrade-v7-to-v8.md
For multi-version jumps (e.g., 5 to 8), apply each upgrade in order:
  1. Read and apply 
    references/upgrade-v5-to-v6.md
  2. Build the project (
    npm run build
    ), fix any errors, and verify the app runs
  3. Read and apply 
    references/upgrade-v6-to-v7.md
  4. Build the project (
    npm run build
    ), fix any errors, and verify the app runs
  5. Read and apply 
    references/upgrade-v7-to-v8.md
  6. Build the project (
    npm run build
    ), fix any errors, and verify the app runs
Do not skip intermediate versions.

Step 3: Final Verification

After completing all upgrade steps:
bash
npm run build
If the project uses Capacitor, also run:
bash
npx cap sync

Error Handling

  • If 
    npm run build
    fails after an upgrade step, check the compiler errors. Most errors are caused by removed component properties, renamed CSS variables, or changed event handler signatures documented in the reference files.
  • If Jest or unit tests fail, check the 
    transformIgnorePatterns
    configuration — Ionic 6+ ships as ES Modules and requires Babel/Jest configuration updates.
  • If CSS styles break after upgrade, check for removed CSS Shadow Parts and renamed CSS variables in the reference file for that version.
  • If a multi-version upgrade fails mid-way, fix the current version step before proceeding to the next.
  • If the project also uses Capacitor and platform builds fail, the Capacitor version may also need upgrading — use the 
    capacitor-app-upgrades
    skill.

Related Skills

  • capacitor-app-upgrades
     — If Capacitor also needs upgrading alongside Ionic, use this skill for the Capacitor-specific upgrade steps.
  • ionic-app-development
     — General Ionic development guidance.
  • capacitor-plugins
     — For installing or reconfiguring plugins after the app upgrade.