Knockout JS вопросы и ответы для интервью
Вопрос 21. 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:
; ; var viewModel = { person: { name: 'John' } };
Вопрос 22. How can you handle submit events in Knockout JS?
You can use the 'submit' binding to associate a function with the submit event of a form element.
Example:
; var viewModel = { handleSubmit: function() { alert('Form submitted!'); } };
Вопрос 23. What is the purpose of the 'if' binding in Knockout JS?
The 'if' binding is used to conditionally render or remove an HTML element based on the truthiness of the associated observable or expression.
Example:
Content to show; var viewModel = { shouldShowContent: ko.observable(true) };
Вопрос 24. Explain the 'with' binding in Knockout JS.
The 'with' binding is used to change the context for descendant elements, allowing you to bind against a different object.
Example:
; var viewModel = { person: { name: 'John' } };
Вопрос 25. What is the purpose of the 'options' binding in Knockout JS?
The 'options' binding is used to generate a set of 'option' elements based on an array or object and bind the selected value to an observable.
Example:
; var viewModel = { countries: ['USA', 'Canada', 'UK'], selectedCountry: ko.observable('USA') };
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