Interview Questions and Answers
Entdecke die wichtigsten Knockout JS Interviewfragen und Antworten fur Einsteiger und erfahrene Kandidaten zur Vorbereitung auf Bewerbungsgespraeche.
Insgesamt 25 Fragen
Interview Questions and Answers
Interview Questions and Answers
Suche eine Frage, um die Antwort zu sehen.
Suche eine Frage, um die Antwort zu sehen.
Fragen und Antworten fur erfahrenes / Experten-Niveau Frage 1
Explain the concept of computed observables. Computed observables in Knockout JS are functions that automatically update whenever the underlying observables they depend on change.
Example:
var firstName = ko.observable('John'); var lastName = ko.observable('Doe'); var fullName = ko.computed(function() { return firstName() + ' ' + lastName(); });
Zum Wiederholen speichern
Frage 2
Explain the concept of custom bindings in Knockout JS. Custom bindings in Knockout JS allow you to create reusable, encapsulated behaviors for handling specific aspects of the UI.
Example:
ko.bindingHandlers.fadeVisible = { init: function(element, valueAccessor) { var value = valueAccessor(); $(element).toggle(ko.unwrap(value)); }, update: function(element, valueAccessor) { var value = valueAccessor(); ko.unwrap(value) ? $(element).fadeIn() : $(element).fadeOut(); } };
Zum Wiederholen speichern
Frage 3
What is the purpose of the 'afterRender' callback in Knockout JS? The 'afterRender' callback is used with the 'foreach' binding to execute a function after each item in the array is rendered in the UI.
Example:
; var items = ko.observableArray(['Item 1', 'Item 2']); function myCallback(elements) { console.log('Rendered elements:', elements); } Zum Wiederholen speichern
Frage 4
Explain the 'templateOptions' property in Knockout JS. The 'templateOptions' property allows you to pass additional options to a template specified in the 'template' binding.
Example:
; Details; var viewModel = { person: { name: 'John' } }; Zum Wiederholen speichern
