Angular Best Practices

Here are some Angular best practices that can help you write clean, maintainable, and efficient Angular applications:

1. Use Smart-Dumb components pattern, break large component into smaller dumb components.
2. Declare variable type instead of using ‘any’ as far as possible.
3. Use index.ts file to reduce the size of the import statements.
4. Consider leaving one empty line between third party imports and application imports.
5. Maintain clean folder structure, follow consistent and meaningful variable, classm file naming conventions.
6. Per file the code must not exceed from 400 lines limit.
7. Define smaller functions, not exceeding 75 lines of code.
8. Avoid inline template/styles in @component decorator. Extract templates and styles into a separate file, when more than 3 lines.
9. Use ES6/TS latest features (optional chaining, map, reduce, spread operator, arrow functions, short hand object notation, let, const etc.)
10. Generate component, modules etc. using angular-cli tool instead of copying/cloning from existing ones. It will save effort of manually configuration.
11. Rule of One – Do define one thing, such as a service or component, per file. One component per file makes it far easier to read, maintain, and avoid collisions with teams in source control.
12. Try to be DRY (Don’t Repeat Yourself), create utility functions for repeatedly used code (like email validation, format date, strip html) and reuse the same.
13. Avoid inline CSS (with style tag) in component templates. Instead define CSS in component stylesheet.

Naming Conventions:

Following consistent and meaningful naming conventions in your Angular projects is crucial for maintaining a clean and organized codebase. Angular’s official style guide provides recommendations for naming various parts of your application. Here are some key naming conventions to follow:

Variable / Property	camelCase
Class	PascalCase
Interface	PascalCase
Constant	UPPER_SNAKE_CASE
Function	camelCase
File / Folder	lowercase
Component’s selector	lower-kebab-case

Naming Files:

Do follow a pattern that describes the symbol’s feature then its type. The recommended pattern is feature.type.ts. Conventional type names include .service, .component, .pipe, .module, and .directive. Invent additional type names if you must but take care not to create too many.

Example: user-profile.component.ts, login.component.ts, api.service.ts, seach-filter.pipe.ts, auth.module.ts

• Use a descriptive name that reflects the component’s purpose.
• Use dashes to separate words in the descriptive name.
• Do not use abbreviated type such as .srvc, .cmp etc.
• The naming conventions should help find desired code faster and make it easier to understand.
• Use lowercase to name files and folders.

Naming Component/Service/Directive/Module:

• Do use consistent names for all component/service/directive/module named after their feature.
• Do suffix a component/service/directive/module class name with Component/Service/Directive/Module. For example: UserAdminComponent, DataService, WidgetDirective, RoutingModule and so on.

Conclusion:

By following these Angular best practices and naming conventions, you’ll make your codebase more consistent and easier to read for both yourself and other developers working on the project. Remember that maintaining a clear and organized structure is essential for the long-term maintainability of your application..