Below are the list of Top knockout.js interview questions and their answers
Knockout JS is a JavaScript library based on MVVM (Model View ViewModel) pattern that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model.
Knockout JS is small light weighted JavaScript library that is mostly used for designing an SPA (Single Page Application).
Key Features of Knockout JS
Knockout js supported two types of binding
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Observables: In KnockoutJS observables are special type of JavaScript objects that can notify subscribers about changes, and can automatically detect dependencies. Observables helps KnockoutJS to update your UI automatically when the view model changes.
var myViewModel = {
personName: ko.observable('Bob'),
personAge: ko.observable(123)
};
Components are a powerful, clean way of organizing your UI code into self-contained, reusable chunks.They:
A viewModel in Knockout js is a basic class that is created as JavaScript Function.It is declared as a variable that have member variables and methods.
var myViewModel = {
personName: 'Bob',
personAge: function(age){
return age+"years old";
}
};
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