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Author: saqibkhan

  • Leverage Advanced Routing and Navigation:

    • Master route guards for access control, resolvers for pre-fetching data, and custom navigation strategies for smoother user journeys.

  • Implement Effective Error Handling and Logging:

    • Go beyond basic try-catch blocks. Use services like ErrorHandler and custom logging strategies to diagnose issues efficiently and provide a better user experience.

  • Optimize Change Detection:

    • Understand how change detection works and identify performance bottlenecks. Use OnPush change detection, memoization, and trackBy function to minimize unnecessary re-renders.

  • Architect Components for Reusability:

    • Design components with clear inputs, outputs, and logic separation. Leverage features like Content Projection and ViewChild to create flexible and reusable components.

  • Master RxJS for Reactive Programming:

    • Understand Observables, Operators, and Subject for handling asynchronous data streams, building responsive UIs, and managing side effects elegantly.

  • Dive Deeper into TypeScript:

    • Go beyond basic types and explore advanced features like generics, decorators, and interfaces. This improves code clarity, type safety, and maintainability.

  • What type of DOM does Angular implement? 

    DOM (Document Object Model) treats an XML or HTML document as a tree structure in which each node is an object representing a part of the document. 

    Angular uses the regular DOM. This updates the entire tree structure of HTML tags until it reaches the data to be updated. However, to ensure that the speed and performance are not affected, Angular implements Change Detection.

    With this, you have reached the end of the article. We highly recommend brushing up on the core concepts for an interview. It’s always an added advantage to write the code in places necessary. 

  • What is Eager and Lazy loading? 

    Eager loading is the default module-loading strategy. Feature modules under Eager loading are loaded before the application starts. This is typically used for small size applications.

    Lazy loading dynamically loads the feature modules when there’s a demand. This makes the application faster. It is used for bigger applications where all the modules are not required at the start of the application. 

  • What is Bootstrap? How is it embedded into Angular? 

    Bootstrap is a powerful toolkit. It is a collection of HTML, CSS, and JavaScript tools for creating and building responsive web pages and web applications.

    There are two ways to embed the bootstrap library into your application. 

    1. Angular Bootstrap via CDN – Bootstrap CDN is a public Content Delivery Network. It enables you to load the CSS and JavaScript files remotely from its servers. 
    2. Angular Bootstrap via NPM – Another way to add Bootstrap to your Angular project is to install it into your project folder by using NPM (Node Package Manager). 

    npm install bootstrap 

    npm install jquery

  • What are Template and Reactive forms?

    Template-driven approach

    • In this method, the conventional form tag is used to create forms. Angular automatically interprets and creates a form object representation for the tag. 
    • Controls can be added to the form using the NGModel tag. Multiple controls can be grouped using the NGControlGroup module. 
    • A form value can be generated using the “form.value” object. Form data is exported as JSON values when the submit method is called. 
    • Basic HTML validations can be used to validate the form fields. In the case of custom validations, directives can be used. 
    • Arguably, this method is the simplest way to create an Angular App. 

    Reactive Form Approach

    • This approach is the programming paradigm oriented around data flows and propagation of change. 
    • With Reactive forms, the component directly manages the data flows between the form controls and the data models. 
    • Reactive forms are code-driven, unlike the template-driven approach. 
    • Reactive forms break from the traditional declarative approach. 
    • Reactive forms eliminate the anti-pattern of updating the data model via two-way data binding.
    • Typically, Reactive form control creation is synchronous and can be unit tested with synchronous programming techniques.