Edchart Certified

Ext JS Framework SME


Ext JS is a comprehensive and feature-rich JavaScript framework developed by Sencha, tailored for building modern web applications with unparalleled functionality and scalability. With its extensive set of UI components, data-driven architecture, and robust MVC (Model-View-Controller) architecture, Ext JS empowers developers to create sophisticated and dynamic user interfaces that rival native desktop applications. From complex data grids and charts to interactive forms and rich animations, Ext JS offers a diverse range of tools and capabilities to meet the demands of today's web development landscape. Its modular and extensible nature allows developers to easily customize and extend the framework to suit their specific project requirements, while its built-in themes and responsive design ensure a consistent and polished user experience across all devices.

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Mastering Ext JS Framework: A Guide to Becoming a Certified Expert

As the digital landscape evolves, the demand for robust web applications continues to soar. In this dynamic environment, mastering Ext JS Framework Certification becomes imperative for developers seeking to create powerful, feature-rich web applications. With its comprehensive set of tools and components, Ext JS empowers developers to build modern web applications with ease and efficiency. Here's everything you need to know about Ext JS Framework, from its key features to the benefits of obtaining Ext JS Certification.

1. Understanding Ext JS Framework

Ext JS Framework, also known as ext javascript, is a feature-rich JavaScript framework developed by Sencha. It provides developers with a comprehensive suite of UI components, data visualization tools, and utilities to build interactive web applications. With its MVC architecture and robust data package, Ext JS simplifies complex web development tasks and enhances productivity.

2. Exploring the Key Features of Ext JS

Rich UI Components: Ext JS Framework Certification offers a wide range of pre-built UI components, including grids, forms, charts, and more, to create modern and visually appealing user interfaces.

MVC Architecture: With a built-in Model-View-Controller (MVC) architecture, Ext JS Framework promotes code organization and maintainability, allowing developers to manage complex applications efficiently.

Data Package: The powerful data package in Ext JS facilitates seamless data management, including data binding, sorting, filtering, and grouping, to deliver a superior user experience.

Cross-Browser Compatibility: Ext JS ensures consistent performance across major web browsers, enabling developers to reach a broader audience without compatibility issues.

Theming and Customization: Developers can easily customize the appearance of their applications using Ext JS theming capabilities, ensuring brand consistency and flexibility.

3. Why Pursue Ext JS Framework Certification?

Obtaining Ext JS Framework Certification offers numerous benefits:

Validation of Expertise: Certification validates your proficiency in Ext JS development, enhancing your credibility and marketability as a developer.

Career Advancement: Certified professionals often enjoy better Ext JS Framework career opportunities and higher salaries in the competitive job market.

Access to Exclusive Resources: Certification programs provide access to exclusive learning resources, updates, and community forums, enabling continuous skill development and networking.

4. How to Prepare for Ext JS Certification

Master the Fundamentals: Familiarize yourself with the core concepts of Ext JS, including components, layouts, and data models.

Hands-On Practice: Gain practical experience by building real-world applications using Ext JS. Experiment with different components and features to deepen your understanding.

Enroll in Certification Courses: Explore online courses and training programs designed specifically for Ext JS Certification preparation. These resources offer comprehensive study materials and practice exams to help you succeed.

Stay Updated: Stay abreast of the latest trends and updates in Ext JS Framework development by following official documentation, blogs, and community forums.

5. Partnering with Credly for Global Credentials

At Edchart, we are committed to empowering developers with industry-recognized certifications. Through our partnership with Credly, a leading digital credentialing platform, we offer Ext JS Certification programs designed to validate your expertise and elevate your career. Earn your Ext JS Certification badge today and join a global community of certified professionals.

Ext JS Framework Certification

Becoming an Ext JS Framework Certification holder opens doors to a world of opportunities. As an ext js developer, having this certification validates your expertise and showcases your commitment to mastering the ext js framework. With the rise of web development, particularly in extjs, employers seek individuals who possess a deep understanding of sencha extjs and its intricacies.

Ext JS Development

Delve into the world of ext javascript with Ext JS Development. This robust framework, also known as extended js, empowers developers to create stunning web applications with ease. Mastering extjs development not only enhances your skill set but also opens doors to exciting career prospects. Explore the endless possibilities of extjs and embark on a journey towards becoming a sought-after developer.

Ext JS Developer

Becoming an Ext js developer opens up a world of opportunities in web development. Ext JS simplifies the process of building feature-rich web applications with its comprehensive set of tools and components. As an Ext JS developer, you'll harness the power of this framework to create dynamic and visually stunning user interfaces.

Ext JS

Ext JS is a leading framework for building cross-platform web applications. With its rich set of UI components and robust architecture, Extjs Development enables developers to create enterprise-grade applications with ease. Whether you're building a simple website or a complex business application, Ext JS provides the tools you need to succeed.


Ext JS Framework, also known as Sencha ExtJS, is a widely-used JavaScript framework for building modern web applications. Its extensive library of pre-built components and plugins simplifies the development process, allowing developers to focus on delivering exceptional user experiences.

Ext JavaScript

Ext JavaScript is the backbone of Ext js developer framework. It provides developers with a powerful toolkit for building interactive and responsive web applications. With its modular architecture and intuitive API, Ext JavaScript empowers developers to create scalable and maintainable code.

Extended JS

Extended JS refers to the extended capabilities of Ext JS framework. It offers advanced features and functionalities for building sophisticated web applications. By leveraging Ext js developer, developers can create highly customized solutions tailored to their specific requirements.


Skills Required for Ext JS Framework Certification

Mastering the Ext JS Framework demands a diverse skill set encompassing various aspects of web development. Firstly, proficiency in JavaScript programming is essential, as Ext JS heavily relies on JavaScript for building interactive user interfaces. Developers should also have a solid understanding of the Model-View-Controller (MVC) architecture, which forms the foundation of Ext JS applications. Additionally, familiarity with web technologies such as HTML and CSS is crucial for effective UI development. Knowledge of data manipulation techniques and experience working with RESTful APIs is also beneficial, as Ext JS provides robust data handling capabilities.

Description of Ext JS Framework

Ext JS Framework, developed by Sencha, is a comprehensive JavaScript framework designed to simplify the development of rich web applications. It offers a wide range of UI components, data handling capabilities, and built-in tools for creating modern and interactive user interfaces. With its MVC architecture, developers can efficiently organize their codebase, leading to better maintainability and scalability of applications. Ext js developer also provides extensive documentation and support, making it an ideal choice for enterprise-grade web development projects.

Scopes of Ext JS Framework

The Extjs Development finds applications across various domains and industries. From building enterprise dashboards and data analytics tools to creating responsive and mobile-friendly web interfaces, Ext JS offers versatility and flexibility. Developers can leverage its rich set of UI components, theming capabilities, and data handling features to develop sophisticated web applications tailored to specific business needs. Ext JS is particularly well-suited for projects requiring complex data visualization, dynamic content, and cross-platform compatibility.

Pros and Cons of Ext JS Framework


Rich set of UI components

Comprehensive documentation and support

Powerful data handling capabilities

Cross-browser compatibility

Built-in theming and customization options


Steeper learning curve compared to other frameworks

Licensing costs for commercial useLarge file size of framework libraries

Limited community support compared to open-source alternatives

Features of Ext JS Framework

Key features of Ext JS Framework include:

MVC architecture for code organization

Extensive UI component library

Advanced data package for data handling

Built-in theming and customization options

Touch-optimized components for mobile development

Why Should One Take Ext JS Framework

Obtaining Ext JS Framework certification offers several advantages. It validates expertise in Ext JS development, enhances career opportunities, provides access to exclusive resources, and earns recognition from industry leaders and employers. With Ext js developer certification, developers can showcase their skills and stand out in the competitive job market.

Who Will Benefit from Taking Ext JS Framework

Ext JS Framework certification is beneficial for web developers, software engineers, UI/UX designers, and IT professionals looking to advance their careers in web development. Whether you're a beginner or an experienced developer, Extjs Development certification equips you with the skills and knowledge needed to excel in the field.

Is Ext JS Framework Worth It?

Yes, Ext JS Framework certification is worth it for developers seeking to enhance their proficiency in web development. With its robust features, wide-ranging applications, and industry recognition, Ext JS certification opens up new career opportunities and prospects for growth in the rapidly evolving field of web development.

What is Ext JS, and What are Its Key Features?

Ext JS Framework, developed by Sencha, is a comprehensive JavaScript framework widely used for building rich and interactive web applications. Its key features include a vast array of UI components, robust data handling capabilities, and extensive support for enterprise-level applications. With its MVC architecture, developers can efficiently organize their codebase, leading to better maintainability and scalability of applications.

Explain the Model-View-Controller (MVC) Architecture in Ext JS.

In Ext JS Framework, the MVC architecture divides an application into three interconnected components:

Model: Represents the application's data and business logic.

View: Represents the user interface components and their layout.

Controller: Acts as an intermediary between the Model and View, handling user input and updating the Model and View accordingly. This separation of concerns enhances code reusability, maintainability, and testability.

How Does Ext JS Differ from Other JavaScript Frameworks like Angular or React?

Ext JS differs from frameworks like Angular or React in several aspects:

Comprehensive UI Components: Ext js developer provides a rich set of UI components out-of-the-box, making it suitable for enterprise-level applications.

Built-in Data Package: It offers a powerful data package for handling data-intensive applications.

Commercial Support: Ext JS Framework comes with commercial support from Sencha, ensuring timely updates and maintenance.

MVC Architecture: Ext JS follows a strict MVC architecture, promoting code organization and modularity.

What Are Some Commonly Used Components in Ext JS, and How Do You Create Them?

Ext JS offers a wide range of UI components such as grids, forms, trees, charts, and toolbars. These components can be created using Extjs Development classes and configured with various options to customize their behavior and appearance.

How Does Data Binding Work in Ext JS?

Data binding in Ext JS establishes a connection between the data in the Model and its representation in the View. It ensures that any changes to the underlying data are automatically reflected in the UI components bound to that data. Ext js developer supports two-way data binding, allowing seamless synchronization between the Model and View.

Describe the Concept of Layouts in Ext JS. What Types of Layouts Are Available?

Layouts in Ext JS Framework determine the arrangement and positioning of UI components within a container. Common types of layouts include:

Fit Layout: Fits a single component to the container, stretching it to fill the available space.

VBox Layout: Arranges components vertically in a column.

HBox Layout: Arranges components horizontally in a row.

Border Layout: Divides the container into regions (north, south, east, west, and center) to accommodate multiple components.

How Do You Handle Events in Ext JS?

In Extjs Development, events are handled using listeners attached to UI components. Developers can define event handlers to respond to user interactions such as clicks, keypresses, and mouse movements. Event handling in Ext JS follows a declarative approach, allowing developers to specify event listeners directly within component configurations.

Explain the Role of Stores and Models in Ext JS.

Stores in Ext js developer are responsible for loading and managing data collections. They act as a data interface between the Model and View, allowing components to fetch, filter, and manipulate data. Models define the structure and behavior of data entities in the application. They encapsulate business logic and provide methods for interacting with data stored in the Store.

What Are the Advantages of Using Ext JS for Enterprise-level Applications?

Ext JS offers several advantages for enterprise-level applications:

Rich set of UI components for building complex interfaces.

Comprehensive data package for handling large datasets.

MVC architecture promotes code organization and scalability.

Commercial support and extensive documentation from Sencha.

Theming and customization options for creating branded applications.

How Do You Handle Form Validation in Ext JS?

Form validation in Ext JS is achieved using validators attached to form fields. Validators perform client-side validation of user input based on predefined rules such as required fields, email formats, and custom regex patterns. Additionally, Ext js developer provides built-in support for displaying validation messages and handling form submission.

Discuss the Concept of Theming in Ext JS. How Can You Customize the Look and Feel of an Ext JS Application?

Theming in Ext JS allows developers to customize the appearance of UI components to match the branding and design requirements of their applications. Ext js developer provides a powerful theming architecture based on Sass (Syntactically Awesome Stylesheets), which enables developers to define custom themes, colors, and stylesheets. By modifying variables and mixins, developers can create unique and visually appealing designs for their applications.

How Do You Perform AJAX Requests in Ext JS?

Ext JS provides built-in support for AJAX requests using the class. Developers can use methods such as to send asynchronous requests to the server and handle responses using callbacks or promises. Ext js developer also offers proxy classes like for integrating AJAX requests with data stores, simplifying data loading and synchronization tasks.

What is a View Controller, and How is It Used in Ext JS?

A View Controller in Extjs Development is a JavaScript class responsible for managing the behavior and interactions of a View component. It acts as a central hub for handling events, user input, and application logic associated with the View. View Controllers facilitate the separation of concerns by encapsulating the View-specific logic and promoting code reusability and maintainability.

Explain the Concept of Mixins in Ext JS. How Are They Beneficial?

Mixins in Ext JS are reusable code modules that can be mixed into multiple classes to extend their functionality. Mixins allow developers to share common code across different classes without inheritance, promoting code reuse and modularity. By applying Ext js developer, developers can enhance the capabilities of their classes, add new methods or properties, and implement cross-cutting concerns such as logging, validation, or event handling.

How Do You Handle State Management in Ext JS Applications?

Ext JS provides built-in support for state management, allowing developers to persist and restore the state of UI components across user sessions. State management in Ext JS Framework involves storing and retrieving component state data such as field values, scroll positions, and collapsed/expansion states. Developers can leverage features like to manage state data locally or on the server.

Discuss the Process of Component Instantiation in Ext JS.

In Ext JS, components are instantiated using Ext JS classes and configured with various options to customize their behavior and appearance. The instantiation process involves creating instances of component classes, setting configuration properties, and adding components to container elements. Ext JS Framework provides a powerful and flexible component lifecycle, allowing developers to control the creation, rendering, and destruction of components based on application requirements.

How Do You Handle Routing and Navigation in Ext JS Applications?

Routing and navigation in Extjs Development applications are typically managed using theclass and the singleton. Developers can define route patterns and associated controller actions to handle navigation events triggered by changes in the application's URL. Ext JS provides powerful routing capabilities, allowing developers to implement deep linking, bookmarking, and history management features in their applications.

Explain the Concept of Data Packages in Ext JS. How Do They Facilitate Data Management?

Data Packages in Ext JS are reusable modules that encapsulate data models, stores, and associated logic for managing data within an application. Data Packages provide a structured approach to data management, allowing developers to organize and reuse data-related components across different parts of their application. By defining clear boundaries and dependencies, Data Packages promote code modularity, reusability, and maintainability in complex Ext JS Framework applications.

What Are Some Best Practices for Optimizing Performance in Ext JS Applications?

To optimize performance in Ext js developer applications, developers can follow several best practices:

Minimize DOM Manipulation: Reduce the number of DOM operations and minimize layout thrashing.

Use Virtual Scrolling: Implement virtual scrolling for large data sets to improve rendering performance.

Optimize Data Loading: Use buffered stores and paging for efficient data loading and rendering.

Compress and Bundle Assets: Minify and bundle JavaScript and CSS files to reduce network requests and load times.

Lazy Loading: Load components and data only when needed to reduce initial page load time.

Profile and Benchmark: Use browser developer tools to profile and benchmark application performance, identifying and addressing bottlenecks.

How Do You Debug Ext JS Applications? What Tools and Techniques Do You Use?

For debugging Ext js developer applications, developers can use a combination of browser developer tools, Sencha Inspector, and logging techniques:

Browser Developer Tools: Chrome DevTools or Firefox Developer Tools provide features for inspecting and debugging JavaScript code, including breakpoints, console logging, and network analysis.

Sencha Inspector: Sencha Inspector is a debugging tool specifically designed for Extjs Development applications, offering advanced features for inspecting components, debugging event handling, and profiling performance.

Logging: Developers can use console logging statements strategically to output debug information, variable values, and error messages during runtime, helping identify and troubleshoot issues in Ext js developer applications.


In conclusion, the Ext JS Framework stands as a robust and comprehensive solution for building rich and interactive web applications. With its powerful features, including a vast array of UI components, a well-defined MVC architecture, and extensive support for data handling, Extjs Development empowers developers to create sophisticated applications tailored to enterprise-level requirements. The framework's commitment to code organization, modularity, and scalability ensures that developers can efficiently manage and maintain complex codebases, leading to increased productivity and reduced development time. Additionally, Ext JS's theming capabilities allow for effortless customization and branding, enabling developers to create visually stunning and branded applications.

Exam Timing: 60 (Mins)
Pass Per 60%
Level Expert
Roles Hybrid Mobile App Developer
No. of Questions 30
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