KnockoutJS - pop() Method


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Description

The KnockoutJS Observable pop() method removes the last item from an array and returns it.

Syntax

arrayName.pop()

Parameters

Does not accept any parameters.

Example

<!DOCTYPE html>
   <head>
      <title>KnockoutJS ObservableArray pop method</title>
      <script src = "https://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js"
         type = "text/javascript"></script>
   </head>

   <body>
      <p>Example to demonstrate pop()method.</p>
      <button data-bind = "click: popEmp">Remove Emp</button>
      <p>Array of employees: <span data-bind = "text: empArray()" ></span></p>

      <script>
         function EmployeeModel() {
            this.empName = ko.observable("");
            this.chosenItem = ko.observableArray("");
            this.empArray = ko.observableArray(['Scott','James','Jordan','Lee',
               'RoseMary','Kathie']);

            this.popEmp = function() {
               this.empArray.pop();
            }
         }
         
         var em = new EmployeeModel();
         ko.applyBindings(em);
      </script>
      
   </body>
</html>

Output

Let's carry out the following steps to see how the above code works −

  • Save the above code in array-pop.htm file.

  • Open this HTML file in a browser.

  • Click the Remove Emp button and observe that the last element is removed.

knockoutjs_observables.htm
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