managing the focus and blur events within an Angular 1.5 component

Question

managing the focus and blur events within an Angular 1.5 component

While working on an angular js project recently, I encountered a situation involving handling focus and blur events in a textbox. My specific scenario required adding the $ sign when focus is lost from the textbox and removing it when the textbox is focused.

In an attempt to address this, I created a component:

       angular.module('myApp').component('dollarText', {
          templateUrl: '<input type="text">',
          controller: function($scope, iElm, iAttrs){
                iElm.bind('change', function(){
                    iElm.val('$'+iElm.val());
                });
            }
        });

However, I struggled to access the focus event and realized I was approaching it incorrectly. How can I effectively trigger both focus and blur events within an angular component? Is using an angular component the best choice for this task?

javascript angularjs angularjs-directive

Answer 1

Answer №1

To effectively manage a specific div or similar element, such as within an ng-repeat loop or a lengthy list of elements, utilizing function(this) in your JavaScript and function(context) is crucial for interaction with the element.

Here's a functional Plunker example that demonstrates what you may be seeking.

HTML:

<html ng-app="myApp">

  <body ng-controller="myController">
    <!--When on-blur, call blur(this), when on-focus, call focus(this)-->
    <input type="text" name="myApplicationRocks" 
           ng-focus="focus(this)" ng-blur="blur(this)"/>
       <!-- Content changes on blur and on focus-->
       <h1>{{whatToWrite}}</h1>
  </body>  
</html>

JS:

var myApp = angular.module('myApp', []);

myApp.controller('myController', function($scope){
  
  $scope.whatToWrite = "Well, try something";
  
  $scope.focus = function(context){
    console.log("On Focus");
    context.whatToWrite = "Focus On!";
  };
  
  $scope.blur = function(context){
    console.log("On Blur");
    context.whatToWrite = "Blur On!";
  };
});

Although not absolutely necessary, utilizing this and context can greatly enhance functionality in certain scenarios.

I trust this information has been beneficial to you.

Answer 2

To effectively manage a specific div or similar element, such as within an ng-repeat loop or a lengthy list of elements, utilizing function(this) in your JavaScript and function(context) is crucial for interaction with the element.

Here's a functional Plunker example that demonstrates what you may be seeking.

HTML:

<html ng-app="myApp">

  <body ng-controller="myController">
    <!--When on-blur, call blur(this), when on-focus, call focus(this)-->
    <input type="text" name="myApplicationRocks" 
           ng-focus="focus(this)" ng-blur="blur(this)"/>
       <!-- Content changes on blur and on focus-->
       <h1>{{whatToWrite}}</h1>
  </body>  
</html>

JS:

var myApp = angular.module('myApp', []);

myApp.controller('myController', function($scope){
  
  $scope.whatToWrite = "Well, try something";
  
  $scope.focus = function(context){
    console.log("On Focus");
    context.whatToWrite = "Focus On!";
  };
  
  $scope.blur = function(context){
    console.log("On Blur");
    context.whatToWrite = "Blur On!";
  };
});

Although not absolutely necessary, utilizing this and context can greatly enhance functionality in certain scenarios.

I trust this information has been beneficial to you.

managing the focus and blur events within an Angular 1.5 component

Answer №1

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