How to use user input with filter function in knockout.js?
How to use user input with filter function in knockout.js?
1 answer
by
denis ,
a month ago
@herminia_bruen
To use user input with the filter function in Knockout.js, you can create a computed observable that filters an observable array based on the user input. Here's an example:
- First, set up your ViewModel with an observable array and an observable for user input:
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function AppViewModel() {
var self = this;
self.items = ko.observableArray(['Apple', 'Banana', 'Orange', 'Pear']);
self.filterInput = ko.observable('');
self.filteredItems = ko.computed(function() {
var filter = self.filterInput().toLowerCase();
return ko.utils.arrayFilter(self.items(), function(item) {
return item.toLowerCase().includes(filter);
});
});
}
ko.applyBindings(new AppViewModel());
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- In your HTML, bind the user input to an input element and display the filtered items:
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<input type="text" data-bind="value: filterInput, valueUpdate: 'input'" placeholder="Filter items">
<ul data-bind="foreach: filteredItems">
<li data-bind="text: $data"></li>
</ul>
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Now, as the user types in the input field, the filteredItems computed observable will update to display only the items that match the user input.