One-time binding of method parameter

In AngularJS, you can achieve one-time binding of a method parameter by using the :: syntax (double colon) in the template expression. The :: syntax is part of AngularJS's one-time binding feature, which is used to reduce the number of digest cycles and improve performance when you have data that doesn't change frequently.

Here's how you can use one-time binding for a method parameter in AngularJS:

1. HTML Template: In your HTML template, use the :: syntax with the method parameter you want to bind:

   htmlCopy code
   <div>
     
     <p>{{ ::getName(name) }}p>
   div>
   

2. AngularJS Controller: In your AngularJS controller, define the method getName:

   javascriptCopy code
   angular.module('myApp', [])
     .controller('MyController', function($scope) {
       $scope.getName = function(name) {
         console.log('Calculating name...');
         return 'Hello, ' + name + '!';
       };
     });
   

In the above example, the getName method will only be called once when the view is first rendered, and its return value will be used for display. The :: syntax ensures that the method is not recalculated on each digest cycle, providing a performance improvement for cases where you have data that doesn't change frequently.

Keep in mind that one-time binding should be used with caution. It is ideal for cases where you have static or infrequently changing data in your view. If the data is dynamic and needs to be updated frequently, regular two-way binding should be used instead.