Observables & data-bind "value" Text Fields. The two text fields are now observables that update automatically every time new data is put in.
• The first two fields are simple text data bound fields.
• The second two fields have the input html attr and the data-bind "value" attribute
• the strings for first and last name were just simple text strings. Now they are arguments enclosed within ko.observable() methods.
function AppViewModel() {
this.firstName = ko.observable("Bert");
this.lastName = ko.observable("Bertington");
}
// Activates knockout.js
ko.applyBindings(new AppViewModel());
<p>First name: <strong data-bind="text: firstName"></strong></p>
<p>Last name: <strong data-bind="text: lastName"></strong></p>
<p>First name: <input data-bind="value: firstName" /></p>
<p>Last name: <input data-bind="value: lastName" /></p>