KnockoutJS and MVVM (Comes with a sample application) - It's a beginner's guide that discusses about Knockout in particular and MVVM pattern in general. Knockout is a very cool piece of technology that makes your view code less cluttered. This ppt reaches every (not all :-) detail of Knockout. By following this ppt you'll surely be in position to get started with Knockout on your own projects. This ppt comes with an application which you can access from this url https://github.com/manvendrasinghkadam/koshopping. This application is built on Grails. More details on this application can be found on github repo.
Knockout JS is a new JavaScript library that utilizes that MVVM pattern to build rich web applications. In this talk we will introduce Knockout JS as well as the MVVM pattern. This will be a code heavy presentation as we illustrate the various features of the framework. Using Knockout, you can easily build responsive, maintainable and testable JavaScript applications.We'll explore testing in Javascript and look at how you can use Knockout JS with Jasmine, a Javascript BDD library. I'll show you how to build rich JavaScript applications using a Test Driven Development approach. We'll also look into how you can extend Knockout by creating custom bindings and using it side by side with JQuery. Lastly we'll examine how you can interact with Knockout via ASP.NET applications and go over some best practices for validation and storage of data.
The Complementarity of React and Web ComponentsAndrew Rota
On Github: http://andrewrota.github.io/complementarity-of-react-and-web-components-presentation/index.html
The component driven, performance focused approach of React is a perfect complement to the modularity and portability of native HTML Web Components. At first glance, React and Web Components might seem like two radically different solutions to the same problem. But when combined properly they complement each other to create an extremely powerful, expressive framework for developing complex web applications.
Presentation about the native browser way for building web components. We look at examples and the pros and cons of doing it natively and using a library. At the end we look at the Angular way of wrapping custom components into Custom Elements.
Knockout JS is a new JavaScript library that utilizes that MVVM pattern to build rich web applications. In this talk we will introduce Knockout JS as well as the MVVM pattern. This will be a code heavy presentation as we illustrate the various features of the framework. Using Knockout, you can easily build responsive, maintainable and testable JavaScript applications.We'll explore testing in Javascript and look at how you can use Knockout JS with Jasmine, a Javascript BDD library. I'll show you how to build rich JavaScript applications using a Test Driven Development approach. We'll also look into how you can extend Knockout by creating custom bindings and using it side by side with JQuery. Lastly we'll examine how you can interact with Knockout via ASP.NET applications and go over some best practices for validation and storage of data.
The Complementarity of React and Web ComponentsAndrew Rota
On Github: http://andrewrota.github.io/complementarity-of-react-and-web-components-presentation/index.html
The component driven, performance focused approach of React is a perfect complement to the modularity and portability of native HTML Web Components. At first glance, React and Web Components might seem like two radically different solutions to the same problem. But when combined properly they complement each other to create an extremely powerful, expressive framework for developing complex web applications.
Presentation about the native browser way for building web components. We look at examples and the pros and cons of doing it natively and using a library. At the end we look at the Angular way of wrapping custom components into Custom Elements.
Web Components + Backbone: a Game-Changing CombinationAndrew Rota
Web Components promise to change how we think about modularity on the web, and when combined with the structure and organization of Backbone.js we can create portable, dynamic, encapsulated UI modules that fit into any web application.
This is a laconic presentation on Angular JS for beginners only. I have emphasized on example rather than theory. There are self explained source code urls attached with slides. In the last slide I have attached source code for a real life example using Angular JS an BootStrap which may be very helpful to understand the concept of Angular JS.
Levent-Gurses' Introduction to Web Components & PolymerErik Isaksen
This is in a developer-focused session on developing iOS apps with Web Components and Google Polymer.
Web Components usher in a new era of web development based on encapsulated and interoperable custom elements that extend HTML itself. Built atop these new standards, Polymer makes it easier and faster to create anything from a button to a complete application across desktop, mobile, and beyond.
An introduction to AngularJS architecture and usage, equipped with an overview of AngularJS role in solving the problems arised along the history of web development.
For further material and updates:
http://blog.avirancohen.com
http://mnug.de/artikel/meetups/december2014
Scaffolding can be a great way to enable developers quickly in a way consistent with best practices employed by the community or your organization. Yeoman is a proven scaffolding tool for webapps that has been around since 2012 and now sports more than 6000 stars on GitHub. Even though its original focus used to be on supporting front-end development, it now features a considerable number of Node.js-related generators worth exploring. This talk will give a quick overview on the topic of scaffolding, explain what Yeoman is all about and show you how to make the best use of it.
Web Components are like Lego bricks. Easy to assemble and every piece simply fits together. But there is even more to it. Being able to create your own HTML-Tags with encapsulated style & logic changes the way you think about structuring your web applications. Get a sneak peek on how to develop scalable & maintainable applications in the future.
2016 is going to be the year of Virtual DOM. React.js one of the most popular implementation of Virtual DOM. But this time we won't focus on React.js. We will be focusing on what is the concept of Virtual DOM, what's the benefits, and how to use it without React.js. All of those concepts will help you understand this newest DOM manipulation technique and better work with any Virtual DOM implementations such React.js.
Web Components + Backbone: a Game-Changing CombinationAndrew Rota
Web Components promise to change how we think about modularity on the web, and when combined with the structure and organization of Backbone.js we can create portable, dynamic, encapsulated UI modules that fit into any web application.
This is a laconic presentation on Angular JS for beginners only. I have emphasized on example rather than theory. There are self explained source code urls attached with slides. In the last slide I have attached source code for a real life example using Angular JS an BootStrap which may be very helpful to understand the concept of Angular JS.
Levent-Gurses' Introduction to Web Components & PolymerErik Isaksen
This is in a developer-focused session on developing iOS apps with Web Components and Google Polymer.
Web Components usher in a new era of web development based on encapsulated and interoperable custom elements that extend HTML itself. Built atop these new standards, Polymer makes it easier and faster to create anything from a button to a complete application across desktop, mobile, and beyond.
An introduction to AngularJS architecture and usage, equipped with an overview of AngularJS role in solving the problems arised along the history of web development.
For further material and updates:
http://blog.avirancohen.com
http://mnug.de/artikel/meetups/december2014
Scaffolding can be a great way to enable developers quickly in a way consistent with best practices employed by the community or your organization. Yeoman is a proven scaffolding tool for webapps that has been around since 2012 and now sports more than 6000 stars on GitHub. Even though its original focus used to be on supporting front-end development, it now features a considerable number of Node.js-related generators worth exploring. This talk will give a quick overview on the topic of scaffolding, explain what Yeoman is all about and show you how to make the best use of it.
Web Components are like Lego bricks. Easy to assemble and every piece simply fits together. But there is even more to it. Being able to create your own HTML-Tags with encapsulated style & logic changes the way you think about structuring your web applications. Get a sneak peek on how to develop scalable & maintainable applications in the future.
2016 is going to be the year of Virtual DOM. React.js one of the most popular implementation of Virtual DOM. But this time we won't focus on React.js. We will be focusing on what is the concept of Virtual DOM, what's the benefits, and how to use it without React.js. All of those concepts will help you understand this newest DOM manipulation technique and better work with any Virtual DOM implementations such React.js.
Knockout is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model. Any time you have sections of UI that update dynamically (e.g., changing depending on the user’s actions or when an external data source changes), KO can help you implement it more simply and maintainably.
KO provides a complementary, high-level way to link a data model to a UI.
Javascript Frameworks Comparison - Angular, Knockout, Ember and BackboneDeepu S Nath
Introduction and Comparison of polpular JS Frameworks Knockout, Ember, Angular and Backbone. The presentation descrobes How and when to select each framework.
Salesforce is built on the Lightning Platform. This session will provide you with the same training that Salesforce engineers receive during on-boarding. We are bringing this training to you in a two part series. Part 1 will provide detailed information about Component Definition including component-based architecture, component structure, component implementation and key components.
This presentation just giving the overview of knockout java script library. To make my points and definition clear i will blog for each slide on my blog - http://sarveshkushwaha.blogspot.com .Keep connected to learn knockout from scratch.Thanks :)
Slides of a talk of a seminars series I gave at WebRatio in January 2014.
I implemented many best practices and advices in this presentation in a generic app template available here: https://github.com/iivanoo/cordovaboilerplate
Will your code blend? : Toronto Code Camp 2010 : Barry GervinBarry Gervin
XAML getting you down? Tired of the repetition of trial by error WPF or Silverlight development? If you’re not using Expression Blend to build your XAML, you’re doing it all wrong. Let’s take a look at the common pitfalls that new Silverlight developers fall into that make their code unblendable, and then leverage the patterns and techniques that allow us to unlock the virtues of Expression Blend. Testability, blendability, inner peace and maintainability are just 1 hour away
React JS; all concepts. Contains React Features, JSX, functional & Class comp...Karmanjay Verma
This ppt contains all concepts of React JS. This contains React Features JSX, functional & Class component, Hooks. PPT includes sample code also for each defination in comment.
For more detail and source code
https://github.com/KPCodeLearning/React-Learning-App
https://kpcodelearning.github.io/React-Learning-App/
https://www.linkedin.com/in/karmanjayverma/
In depth overview of the Flex data binding code generation. Provides info on accomplish data binding through actionscript as well as limitations of the process.
13.1 Given a scenario description with a list of issues, select the design pattern (Value Object, MVC, Data Access Object, or Business Delegate) that would best solve those issues.
13.2 Match design patterns with statements describing potential benefits that accrue from the use of the pattern, for any of the following patterns:
Value Object
MVC
Data Access Object
Business Delegate
Backbone.js
This presentation has been developed in the context of the Mobile Applications Development course at the Computer Science Department of the University of L’Aquila (Italy).
http://www.di.univaq.it/malavolta
Adding a modern twist to legacy web applicationsJeff Durta
Avoid misery of working with legacy code
We will see how you can add independent and isolated components to existing pages; pages that may be difficult to change
React and Flux allow you to make self-contained additions that handle their own data access/persistence
Enhancing Project Management Efficiency_ Leveraging AI Tools like ChatGPT.pdfJay Das
With the advent of artificial intelligence or AI tools, project management processes are undergoing a transformative shift. By using tools like ChatGPT, and Bard organizations can empower their leaders and managers to plan, execute, and monitor projects more effectively.
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
We describe the deployment and use of Globus Compute for remote computation. This content is aimed at researchers who wish to compute on remote resources using a unified programming interface, as well as system administrators who will deploy and operate Globus Compute services on their research computing infrastructure.
In 2015, I used to write extensions for Joomla, WordPress, phpBB3, etc and I ...Juraj Vysvader
In 2015, I used to write extensions for Joomla, WordPress, phpBB3, etc and I didn't get rich from it but it did have 63K downloads (powered possible tens of thousands of websites).
A Comprehensive Look at Generative AI in Retail App Testing.pdfkalichargn70th171
Traditional software testing methods are being challenged in retail, where customer expectations and technological advancements continually shape the landscape. Enter generative AI—a transformative subset of artificial intelligence technologies poised to revolutionize software testing.
Gamify Your Mind; The Secret Sauce to Delivering Success, Continuously Improv...Shahin Sheidaei
Games are powerful teaching tools, fostering hands-on engagement and fun. But they require careful consideration to succeed. Join me to explore factors in running and selecting games, ensuring they serve as effective teaching tools. Learn to maintain focus on learning objectives while playing, and how to measure the ROI of gaming in education. Discover strategies for pitching gaming to leadership. This session offers insights, tips, and examples for coaches, team leads, and enterprise leaders seeking to teach from simple to complex concepts.
How to Position Your Globus Data Portal for Success Ten Good PracticesGlobus
Science gateways allow science and engineering communities to access shared data, software, computing services, and instruments. Science gateways have gained a lot of traction in the last twenty years, as evidenced by projects such as the Science Gateways Community Institute (SGCI) and the Center of Excellence on Science Gateways (SGX3) in the US, The Australian Research Data Commons (ARDC) and its platforms in Australia, and the projects around Virtual Research Environments in Europe. A few mature frameworks have evolved with their different strengths and foci and have been taken up by a larger community such as the Globus Data Portal, Hubzero, Tapis, and Galaxy. However, even when gateways are built on successful frameworks, they continue to face the challenges of ongoing maintenance costs and how to meet the ever-expanding needs of the community they serve with enhanced features. It is not uncommon that gateways with compelling use cases are nonetheless unable to get past the prototype phase and become a full production service, or if they do, they don't survive more than a couple of years. While there is no guaranteed pathway to success, it seems likely that for any gateway there is a need for a strong community and/or solid funding streams to create and sustain its success. With over twenty years of examples to draw from, this presentation goes into detail for ten factors common to successful and enduring gateways that effectively serve as best practices for any new or developing gateway.
Understanding Globus Data Transfers with NetSageGlobus
NetSage is an open privacy-aware network measurement, analysis, and visualization service designed to help end-users visualize and reason about large data transfers. NetSage traditionally has used a combination of passive measurements, including SNMP and flow data, as well as active measurements, mainly perfSONAR, to provide longitudinal network performance data visualization. It has been deployed by dozens of networks world wide, and is supported domestically by the Engagement and Performance Operations Center (EPOC), NSF #2328479. We have recently expanded the NetSage data sources to include logs for Globus data transfers, following the same privacy-preserving approach as for Flow data. Using the logs for the Texas Advanced Computing Center (TACC) as an example, this talk will walk through several different example use cases that NetSage can answer, including: Who is using Globus to share data with my institution, and what kind of performance are they able to achieve? How many transfers has Globus supported for us? Which sites are we sharing the most data with, and how is that changing over time? How is my site using Globus to move data internally, and what kind of performance do we see for those transfers? What percentage of data transfers at my institution used Globus, and how did the overall data transfer performance compare to the Globus users?
Into the Box Keynote Day 2: Unveiling amazing updates and announcements for modern CFML developers! Get ready for exciting releases and updates on Ortus tools and products. Stay tuned for cutting-edge innovations designed to boost your productivity.
Prosigns: Transforming Business with Tailored Technology SolutionsProsigns
Unlocking Business Potential: Tailored Technology Solutions by Prosigns
Discover how Prosigns, a leading technology solutions provider, partners with businesses to drive innovation and success. Our presentation showcases our comprehensive range of services, including custom software development, web and mobile app development, AI & ML solutions, blockchain integration, DevOps services, and Microsoft Dynamics 365 support.
Custom Software Development: Prosigns specializes in creating bespoke software solutions that cater to your unique business needs. Our team of experts works closely with you to understand your requirements and deliver tailor-made software that enhances efficiency and drives growth.
Web and Mobile App Development: From responsive websites to intuitive mobile applications, Prosigns develops cutting-edge solutions that engage users and deliver seamless experiences across devices.
AI & ML Solutions: Harnessing the power of Artificial Intelligence and Machine Learning, Prosigns provides smart solutions that automate processes, provide valuable insights, and drive informed decision-making.
Blockchain Integration: Prosigns offers comprehensive blockchain solutions, including development, integration, and consulting services, enabling businesses to leverage blockchain technology for enhanced security, transparency, and efficiency.
DevOps Services: Prosigns' DevOps services streamline development and operations processes, ensuring faster and more reliable software delivery through automation and continuous integration.
Microsoft Dynamics 365 Support: Prosigns provides comprehensive support and maintenance services for Microsoft Dynamics 365, ensuring your system is always up-to-date, secure, and running smoothly.
Learn how our collaborative approach and dedication to excellence help businesses achieve their goals and stay ahead in today's digital landscape. From concept to deployment, Prosigns is your trusted partner for transforming ideas into reality and unlocking the full potential of your business.
Join us on a journey of innovation and growth. Let's partner for success with Prosigns.
Field Employee Tracking System| MiTrack App| Best Employee Tracking Solution|...informapgpstrackings
Keep tabs on your field staff effortlessly with Informap Technology Centre LLC. Real-time tracking, task assignment, and smart features for efficient management. Request a live demo today!
For more details, visit us : https://informapuae.com/field-staff-tracking/
Top Features to Include in Your Winzo Clone App for Business Growth (4).pptxrickgrimesss22
Discover the essential features to incorporate in your Winzo clone app to boost business growth, enhance user engagement, and drive revenue. Learn how to create a compelling gaming experience that stands out in the competitive market.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
Experience our free, in-depth three-part Tendenci Platform Corporate Membership Management workshop series! In Session 1 on May 14th, 2024, we began with an Introduction and Setup, mastering the configuration of your Corporate Membership Module settings to establish membership types, applications, and more. Then, on May 16th, 2024, in Session 2, we focused on binding individual members to a Corporate Membership and Corporate Reps, teaching you how to add individual members and assign Corporate Representatives to manage dues, renewals, and associated members. Finally, on May 28th, 2024, in Session 3, we covered questions and concerns, addressing any queries or issues you may have.
For more Tendenci AMS events, check out www.tendenci.com/events
Providing Globus Services to Users of JASMIN for Environmental Data AnalysisGlobus
JASMIN is the UK’s high-performance data analysis platform for environmental science, operated by STFC on behalf of the UK Natural Environment Research Council (NERC). In addition to its role in hosting the CEDA Archive (NERC’s long-term repository for climate, atmospheric science & Earth observation data in the UK), JASMIN provides a collaborative platform to a community of around 2,000 scientists in the UK and beyond, providing nearly 400 environmental science projects with working space, compute resources and tools to facilitate their work. High-performance data transfer into and out of JASMIN has always been a key feature, with many scientists bringing model outputs from supercomputers elsewhere in the UK, to analyse against observational or other model data in the CEDA Archive. A growing number of JASMIN users are now realising the benefits of using the Globus service to provide reliable and efficient data movement and other tasks in this and other contexts. Further use cases involve long-distance (intercontinental) transfers to and from JASMIN, and collecting results from a mobile atmospheric radar system, pushing data to JASMIN via a lightweight Globus deployment. We provide details of how Globus fits into our current infrastructure, our experience of the recent migration to GCSv5.4, and of our interest in developing use of the wider ecosystem of Globus services for the benefit of our user community.
Paketo Buildpacks : la meilleure façon de construire des images OCI? DevopsDa...Anthony Dahanne
Les Buildpacks existent depuis plus de 10 ans ! D’abord, ils étaient utilisés pour détecter et construire une application avant de la déployer sur certains PaaS. Ensuite, nous avons pu créer des images Docker (OCI) avec leur dernière génération, les Cloud Native Buildpacks (CNCF en incubation). Sont-ils une bonne alternative au Dockerfile ? Que sont les buildpacks Paketo ? Quelles communautés les soutiennent et comment ?
Venez le découvrir lors de cette session ignite
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
2. What Is KnockoutJS ?
Rich client-side
interactivity
MVVM pattern
Web browser support
Separates behavior and structure
Declarative bindings
Observables
6+ 2+
3. What Is The Problem ?
Delete Underlying
Data
View
What Is The Solution ?
Delete Underlying
Data
View
4. What KnockoutJS Is Not ?
Client side code
Server code
Database
KnockoutJS
7. How Knockout’s Observables Works ?
Changes to
Targets
Notify
Source
Changes to
Source
Notify
Targets
Two-Way
Data
Binding
Event
Binding
8. Observable And Binding
• Make Property on object an observable using
ko.observable() method passing default value.
• Call ko.applyBindings() method passing object to
method.
• Bind properties of ViewModel object to html elements using
data-bind attribute any binding like text. More on this
later.
• You can make the object using a constructor. *
9. Observable Tricks
• Any property that is declared observable is a function like
getter and setter.
• To access property use: vmObject.property()
• To set property use: vmObject.property(_newValue)
• Don’t ever use = operator to assign values. You’ll
overwrite the observable.
10. Interactive Binding
• We have used text binding. That was a non-interactive
binding.
• Interactive binding is when user interact with the page and
hence the binding.
• click is such a binding.
• More on this later.
11. Computed Observable
Define Your
Own Derived
Property
When You
Need A Value
That Doesn’t
Exist in Web
Service
Based On
Other
Properties and
Observables
Also Supports
Data Binding
12. Computed Observable And Binding
• Make Property on object an computed observable using
ko.computed() method passing a anonymous function
that returns computed value.
• Bind to html elements using data-bind attribute.
13. Observable Array
Notify When
Items Are
Added Or
Removed
Tracks Which
Objects Are In
The Array
No Notification
When Objects
In The Array
Change
Bonus: Can
Use Array
Functions
14. Observable Array And Binding
• Make Property on object an observable array using
ko.observableArray() method passing an array literal.
• Bind to html elements using data-bind attribute and
foreach binding.
• Binding contexts inside foreach: $root et al. More on this
later.
• mvObject.arrayProp() gives you native underlying array.
16. Built In Bindings
Binding For
Element
Attributes
Multiple
Binding
Expressions
Built Into
Knockout
17. Control Flow Bindings
foreach if ifnot with
text
html visible css style attr
click value event enable disable
checked options selectedOptions hasfocus
18. Appearance Bindings
foreach if ifnot with
text
html visible css style attr
click value event enable disable
checked options selectedOptions hasfocus
19. Interactive Bindings
foreach if ifnot with
text
html visible css style attr
click value event enable disable
checked options selectedOptions hasfocus
22. Binding Contexts
• What if you need to access ViewModel object while iterating
array using foreach binding?
• $root : Top level ViewModel object.
• $data : Refers to object for the current context. Like this
keyword in JavaScript. Useful for atomic values like strings
and numbers.
• $index : Obviously index number of current item.
23. Binding Contexts
• $parent : Refers to the parent ViewModel object. Typically
used inside nested loops and when you need to access
properties in the outer loop.
30. click Binding
• click binding is one of the simplest interactive binding. It
just calls a method on your ViewModel when the user click
the element passing function two arguments model and
event.
• vmObject.someMethod = function(model, event) {
// do what ever you want here…
};
31. value Binding
• Similar to text binding. But this time user can update the
value from the View and ViewModel will update accordingly.
Thus value binding is two way binding.
32. event Binding
• The event binding lets you listen for arbitrary DOM events
on any HTML element.
• As it can listen for multiple events, it requires an object to
map events. Just like attr binding.
• data-bind=“event: {mouseover: someMethod,
mouseOut: someOtherMethod}”
33. event Binding
• The function will take two arguments called data and
event.
• vmObject.someMethod = function(data, event) {
// do what ever you want on happening
// of this event…
};
35. enable and disable Binding
• Used to enable or disable some form element on some
particular condition.
36. checked Binding
• Used to select or deselect HTML’s selectable elements like
check boxes and radio buttons.
• We can also use arrays instead of true or false value in the
observable. In this case only those check boxes will be
selected whose value attribute value exist in the array.
• Matches value attribute value of radio button to single
value in observable.
37. options Binding
• This binding is used to build options elements inside a
select element from an observable array.
• value binding is used to preselect or get the selected item
in the select list.
• optionsText binding is used to show the content on the
view when using objects in the observable array instead of
literals.
38. selectedOptions Binding
• As a select list can be made to select multiple items so to
retrieve or set all the selected items we need an array
instead of using an atomic value. Thus instead of value
binding we use selectedOptions binding.
41. Mapping Data To ViewModel
• Mapping plugin dynamically generates new observables.
42. Animation Inside Knockout
• Don’t support animation from core, as it’s a view binding
library not DOM manipulation library.
• All Knockout’s automatic updates are immediately applied
whenever underlying data changes.
43. List Callbacks
• Knockout is a powerful user interface library on its own, but
once you combine it with the animation capabilities of a
framework like jQuery or MooTools, you’re ready to create
truly stunning UIs with minimal markup.
• The foreach binding has two callbacks named
beforeRemove and afterAdd. These functions are
executed before an item is removed from the list or after it’s
been added to the list, respectively. This is our chance to put
in animation logic before Knockout manipulates the DOM.
44. List Callbacks
• These callbacks take a parameter named element which a
reference to the element which Knockout is manipulating.
45. Custom Bindings
• Okey, we’re having fun with foreach binding and its some
level support for plugging in animation logic. But what
about other bindings? They don’t support this already. So
Custom Bindings is answer to the question.
• We can make our own bindings by adding an object
defining the binding to ko.bindingHandlers. This also
happens to be where all of the built-in bindings are defined,
too.
46. Custom Bindings
• The object should have two methods namely init and
update.
• init method is called when Knockout first encounters the
binding. So this callback should define the initial state for the
view component and perform necessary setup actions like
registering event listeners.
47. Custom Bindings
• The update method executes whenever the associated
observable changes.
• Both methods take same two parameters namely element
and valueAccessor.
• The element parameter is the DOM element being bound,
and valueAccessor is a function that will return the
ViewModel property in question (here it is binding value).
48. Conclusion
• Knockout.js is a pure JavaScript library that makes it
incredibly easy to build dynamic, data-centric user
interfaces.
• We covered most of the Knockout.js API, but there are still a
number of nuances left to discover.
• Knockout.js provides plethora of extensibility opportunities
for you to explore!