Blink cell on data change AngularJS

Question

so I'm new to Angular and JS and I've been trying to do something simple with no success.

I have a table with data, everytime this data gets changed I want to make a fade in fade out animation so it blinks. I assumed I could use $watch to watch if an element changes but it's not working.

This is what I got so far:

HTML:

<tbody md-body>
   <tr md-row ng-repeat="item in info.data">
      <td md-cell>{{item.name}}</td>
      <td md-cell>{{item.id}}</td>
      <td md-cell>{{item.thing2}}</td>
      <td md-cell>{{item.thing3}}</td>
      <td md-cell>{{item.thing4}}</td>
      <td md-cell>{{item.thing5}}</td>
   </tr>
 </tbody>

JS:

 $scope.info = {
  "data": [
    {
      name: "ELI 0001",
      id: "123",
      thing1: "thing",
      thing2: "thing",
      thing3: "thing",
      thing4: "thing",
      thing5:"thing",
    },
    {
      name: "ELI 0001",
      id: "123",
      thing1: "thing",
      thing2: "thing",
      thing3: "thing",
      thing4: "thing",
      thing5:"thing",
    },
  ]
};

I added this function to watch the entire data set for changes, and when it does I made an alert. I also added the var initialising so it doesn't show up as soon as it loads.

var initializing = true
$scope.$watch('if',function(){
  if (initializing) {
    $timeout(function() { initializing = false; });
  } else {
    alert('hey')
  }
})

My problem is, how can I get it to watch all cells and execute a class that does the animation only on the data that changed?

Answer 1

AS this thread https://groups.google.com/forum/#!msg/angular/xZptsb-NYc4/rKAxJ3dQhbMJ , what I ended up doing was this:

app.directive('highlightOnChange', function() {
  return {
    link: function($scope, element, attrs) {
      attrs.$observe('highlightOnChange', function(val) {
        var el = $(element);
        el.removeClass('blink_me ');
        _.defer(function() {
          el.addClass('blink_me ')
        });
      });
    }
  };
});

That is, creating a directive observes the property. You can then use it like this:

<td md-cell highlight-on-change="{{item.name}}"></td>
...

suppose your css class be:

.blink_me {
  animation: blinker 1s linear infinite;
}    
@keyframes blinker {
  50% {
    opacity: 0;
  }
}

Answer 2

I was working on a similar approach to @khateeb -- except I am using a $watch on the element's ng-model instead of using $observe on the directive attribute. Both work!

Plunker: https://embed.plnkr.co/rZVjPmDft997Kmny1LS4/

Snippet:

 (function() { "use strict"; var app = angular .module('plunker', []) .controller('MainCtrl', MainCtrl) .directive('flashTd', flashTD); function flashTD($timeout, $compile) { return { scope: { ngModel: '=' }, link: function($scope, elem, attrs) { // Set a watch on ng-model to wait for value change $scope.$watch('ngModel', function(newVal, oldVal) { if (newVal !== oldVal) { // Flash row // var row = angular.element(elem[0].parentNode.parentNode); // Flash td var td = angular.element(elem[0].parentNode); // Using a timeout to simulate remote data change $timeout(function() { if (td.hasClass('flash')) { td.removeClass('flash'); } $timeout(function() { td.addClass('flash') }) }, 2000) } }) } } } MainCtrl.$inject = ["$scope"]; function MainCtrl($scope) { // Sample Data $scope.info = { "data": [{ name: "ELI 0001", id: "123", thing1: "thing", thing2: "thing", thing3: "thing", thing4: "thing", thing5: "thing", }, { name: "ELI 0001", id: "1234", thing1: "thing", thing2: "thing", thing3: "thing", thing4: "thing", thing5: "thing", }] }; } })()

 .editPencil:hover { cursor: pointer; } /* https://stackoverflow.com/questions/14607695/flashing-table-row */ @keyframes flash { from { background-color: #ffbe76; } to { background-color: inherit; } } .flash { animation: flash 1s 1; }

 <!DOCTYPE html> <html ng-app="plunker"> <head> <meta charset="utf-8" /> <title>AngularJS - Flash TD on Change</title> <link data-require="bootstrap@3.3.7" data-semver="3.3.7" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" /> <link rel="stylesheet" href="style.css" /> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <script data-require="bootstrap@3.3.7" data-semver="3.3.7" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <script> document.write('<base href="' + document.location + '" />'); </script> <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.20/angular.js" data-semver="1.3.20"></script> <script src="app.js"></script> </head> <body ng-controller="MainCtrl"> <div class="container"> <div class="row"> <div class="col-xs-12"> <div class="jumbotron text-center"> <h3>AngularJS - Flash TD on Change</h3> </div> </div> <div class="col-xs-12 col-sm-12 col-md-12"> <form class="form"> <div class="form-group"> <table class="table"> <thead> <tr> <th></th> <th>Name</th> <th>Id</th> <th>Thing1</th> <th>Thing2</th> <th>Thing3</th> <th>Thing4</th> <th>Thing5</th> </tr> </thead> <tbody> <tr ng-repeat="item in info.data"> <td class="editPencil glyphicon-pencil text-center" style="transform: rotate(45deg)" ng-click="editRow = !editRow"></td> <td> <span ng-hide="editRow">{{ item.name }}</span> <input type="text" class="input-sm" ng-model="item.name" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.id }}</span> <input type="text" class="input-sm" ng-model="item.id" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.thing1 }}</span> <input type="text" class="input-sm" ng-model="item.thing1" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.thing2 }}</span> <input type="text" class="input-sm" ng-model="item.thing2" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.thing3 }}</span> <input type="text" class="input-sm" ng-model="item.thing3" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.thing4 }}</span> <input type="text" class="input-sm" ng-model="item.thing4" ng-hide="!editRow" flash-td /> </td> <td> <span ng-hide="editRow">{{ item.thing5 }}</span> <input type="text" class="input-sm" ng-model="item.thing5" ng-hide="!editRow" flash-td /> </td> </tr> </tbody> </table> </div> </form> </div> </div> </div> </body> </html>

Directive

In my demo, I'm flashing the td , but you can as easily change it to flash the target's table row by using the commented-out row variable instead of the td variable.

app.directive('flashTd', flashTD);

function flashTD($timeout, $compile) {
    return {
      scope: {
        ngModel: '='
      },
      link: function($scope, elem, attrs) {

        // Set a watch on ng-model to wait for value change
        $scope.$watch('ngModel', function(newVal, oldVal) {
          if (newVal !== oldVal) {
            // Flash row
            // var row = angular.element(elem[0].parentNode.parentNode);

            // Flash td
            var td = angular.element(elem[0].parentNode);

            // Using a timeout to simulate remote data change
            $timeout(function() {

              if(td.hasClass('flash')) {
                td.removeClass('flash');
              }

              $timeout(function() {
                td.addClass('flash')
              })

            }, 2000)

           }
        })
      }
    }
  }

HTML Element

 <input type="text" class="input-sm" ng-model="item.thing2" ng-hide="!editRow" flash-td />

Blink cell on data change AngularJS

Question

2 answers

solution1
1 2018-04-17 17:21:32

solution2
0 2018-04-17 17:47:15

Directive

HTML Element

Blink cell on data change AngularJS

Question

2 answers

solution1 1 2018-04-17 17:21:32

solution2 0 2018-04-17 17:47:15

Directive

HTML Element

solution1
1 2018-04-17 17:21:32

solution2
0 2018-04-17 17:47:15