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Using template is very easy to incorporate into website. For a duplication you don’t need to write over and over again just call them repetitively. Parameters:Following properties can be sent as a parameter-value:name, nodes, data, if, foreach, as, afterAdd, afterRender, beforeRemove. Lets see an example of Templating: <!DOCTYPE html> <head> <title>KnockoutJS – Templating</title> <script src=”http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.3.0.js” […]
Using a single object called dependency tracker i.e. ko.dependencyDetection you can determine when the value get updated. When you declare a computed observable, KO immediately gets its initial value and updated computed observable. Lets see an example for Dependency Tracking: <!DOCTYPE html> <html> <head> <title>Dependency Tracking – KnockoutJS</title> <script src=”http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js” type=”text/javascript”></script> </head> <body> <div> <form […]
To connect data to UI declarative bindings are used. As bindings and Observables both are different, using normal javascript object you can bind view. Declarative Bindings consists of two values i.e. name and value: Full name: <input data-bind=”value: fullName, valueUpdate: ‘afterkeydown’” /> Here when each key is pressed value will be updated.
Components are way of organizing the UI code for structure wise and promote code re-usability for a large application. Components can be registered using the ko.components.register() API. ko.components.register(‘componentname’, { viewModel: {…}, template: {….) }); <!DOCTYPE html> <head> <title>Components of KnockoutJS</title> <script src=”https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js”></script> </head> <body> <h4>Example 1: without parameters</h4> <div data-bind=’component: “example-editor”‘></div> <h4>Example 2: passing parameters</h4> […]
3 concepts in which KnockoutJS is build upon is:– Through observables dom elements and ViewModel exchange information– Bindings between UI and ViewModel– Templating web applications To make it observable declare as:this.property = ko.observable(‘value’); Let’s try below Observables example: <!DOCTYPE html> <head> <title>KnockoutJS – Observables</title> <script type=”text/javascript” src=”http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js”></script> </head> <body> <!– This is input box, used […]
Now a days everyone use a single page application i.e. all necessary information are gathered into a single page and KnockoutJS is no exception of this which uses MVVM Application Framework. This is a client side framework which very easily bind html to domain data with MVVM pattern. MVVM is an architectural design pattern for […]
In this tutorial you will get the basic knowledge of KnockoutJS and how to use on programming. Basically it is a JavaScript library based on MVVM pattern i.e. Model-View-View-Model by which developer build rich and responsive websites. It separates the application model, view and view model. It supports most of browsers i.e. Firefox 3.5+, IE […]