Angular 20 error list

 

Here’s a list of common errors and issues you might encounter when developing applications in AngularJS (Angular 1.x), along with descriptions to help understand them:

1. Syntax and Coding Errors

• Unexpected Token: Usually occurs due to missing or extra syntax characters like commas, brackets, or semicolons.
• Unterminated String Literal: Happens when a string declaration is not closed properly with quotes.

2. Dependency Injection Errors

• Unknown provider: serviceNameProvider: Occurs when a service is not properly registered or injected.
• [$injector
  ] Unknown Provider: Indicates that Angular cannot find the provider or service being requested.
• [$injector
  ] Module 'myApp' is not available: Happens when the module name is misspelled or not loaded correctly.

3. Scope Errors

• [$rootScope
  ] $digest already in progress: An attempt is made to trigger a digest cycle while one is already running.
• TypeError: Cannot read property 'X' of undefined: Trying to access properties on undefined or null scope variables.
• ExpressionChangedAfterItHasBeenCheckedError: Triggered when a binding or expression changes after Angular’s change detection has run.

4. Controller Errors

• [$controller
  ] Controller 'myController' is not registered: The specified controller is not defined or imported properly.
• [$controller
  ] Argument 'myController' is not a function, got undefined: The controller is referenced but not defined as a function.

5. Directive Issues

• [$compile
  ] Controller 'ngModel', required by directive, can't be found: A directive that requires ngModel is used but ngModel is not present.
• [$compile
  ] Multiple directives with the same priority found: Happens when multiple directives compete for a priority on the same element.

6. Template Errors

• [$interpolate
  ] Can't interpolate: {{ expression }}: Indicates an error within an AngularJS expression.
• [$parse
  ] Syntax Error: Issues in AngularJS expressions that involve illegal or unexpected tokens.
• [$compile
  ] Template for directive 'myDirective' must have exactly one root element: Template used in a directive must have only one root node.

7. Routing and Navigation Issues

• [$routeProvider
  ] Route not found: Configuration for a route is missing or not properly set up.
• [$location
  ] Invalid url "url": URL issues in hashPrefix or during routing.

8. Binding and Data Display Errors

• {{ variableName }} remains displayed: Occurs when AngularJS fails to bind data and the expression stays in the view.
• One-way data binding issues: Variables do not update in the view after changes are made in the controller.

9. Event Handling and Directives

• ngClick not working: Often caused by missing or incorrectly applied event handlers.
• ngRepeat errors: Common issues include duplicate track by keys or using non-unique values in collections.

10. HTTP and AJAX Errors

• [$http
  ] Http request configuration url must be a string or a $sce trusted object: Error due to incorrect HTTP request configurations.
• CORS (Cross-Origin Resource Sharing) error: Occurs when trying to access resources from different domains without the proper headers.
• Error: $http pending request error: Issue related to pending HTTP requests not being resolved.

11. Promises and Asynchronous Handling

• TypeError: .then is not a function: Usually occurs when the method being chained is not a promise.
• Unresolved promise warnings: Promises not handled properly or forgotten to be resolved or rejected.

12. Form Validation and Input Issues

• ngModel not updating: Happens when the model doesn’t bind correctly to the input.
• Form $invalid or $pristine not behaving as expected: Issues related to validation or pristine state management.

13. Module Loading Issues

• [$injector
  ] Module 'ngAnimate' is not available!: Required modules not loaded or improperly referenced.
• [$injector
  ] Failed to instantiate module 'myApp': This error gives a detailed stack trace that shows which module failed.

14. Digest Cycle Problems

• $digest already in progress: Attempt to run $apply() or $digest() while one is already in progress.
• Too many $digest iterations: Infinite loop detected in the $digest cycle due to an expression causing continuous updates.

15. Security Warnings

• [$sce
  ] Blocked loading of resource from unsafe URL: Angular’s Strict Contextual Escaping (SCE) blocking potentially unsafe URLs.
• Cross-site scripting (XSS) warnings: Using ng-bind-html without sanitizing inputs can cause XSS vulnerabilities.

16. Performance Issues

• Slow digest cycle: Large amounts of data or deep scopes can lead to slow digest cycles.
• Too many watchers: Excessive use of watchers leading to performance bottlenecks.

17. Browser Compatibility

• Inconsistent behavior across browsers: Different implementations of JavaScript can lead to subtle bugs that only appear in specific browsers.

18. Deprecated Features

• Use of deprecated methods: Using old AngularJS methods that are no longer supported in newer versions.
• Breaking changes after AngularJS updates: Version upgrade issues related to breaking changes.

19. Testing Errors

• Karma test failures: Issues related to unit testing with Karma, like improper test setups or missing dependencies.
• Jasmine test failures: Misconfigured tests or asynchronous issues causing failed test cases.

20. Miscellaneous

• Failed to instantiate module due to circular dependency: Circular dependencies between services or modules.
• [$compile
  ] DOM nodes cannot be wrapped: AngularJS does not support wrapping raw DOM elements.

Properly handling these errors typically requires careful reading of error messages, checking AngularJS documentation, and debugging with browser developer tools.