KnockoutJS - push() 方法

描述

KnockoutJS Observable push('value') 方法在数组末尾插入一个新项。

语法

arrayName.push('value')

参数

仅接受一个参数，即要插入的值。

示例

<!DOCTYPE html>
   <head>
      <title>KnockoutJS Observable Array push() 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 push() method.</p>
      <p>Enter name: <input data-bind = 'value: empName' /></p>
      <p><button data-bind = "click: addEmp">Add Emp </button></p>
      <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']);  //Initial Values
            
            this.addEmp = function() {
               
               if (this.empName() != "") {
                  this.empArray.push(this.empName());    //insert accepted value in array
                  this.empName("");
               }
            }.bind(this);
         }
         
         var emp = new EmployeeModel();
         ko.applyBindings(emp);
      </script>
      
   </body>
</html>