SoluableNonagon
SoluableNonagon

Reputation: 11755

How to display something when filtering is slow using AngularJS

In angular I have a table and a search box where user can type and angular will search among the data and display a table. The problem is that I have enough data that filtering can get slowed down, in this case, I would like to display a spinner:

Sample similar to my html:

<body ng-controller="MainCtrl">

Search: <input ng-model="searchText">
<table id="searchTextResults">
  <tr><th>Name</th><th>Phone</th><th>Address</th><th>City</th><th>Zip</th><th>Country</th></tr>
  <tr ng-repeat="friend in friends | filter:searchText">
    <td>{{friend.name}}</td>
    <td>{{friend.phone}}</td>
    <td>{{friend.address}}</td>
    <td>{{friend.city}}</td>
    <td>{{friend.zip}}</td>
    <td>{{friend.country}}</td>
  </tr>
</table>
<div class='myspinner' > <!-- display only if filtering is occurring -->

The question is, how can I display a spinner each time that filtering is occurring?

CSS for spinner div:

.myspinner {
       position: absolute;
       left: 45%;
       top: 45%;
       height:50px;
       width:50px;
       margin:0px auto;
       position: absolute;
       -webkit-animation: rotation .6s infinite linear;
       -moz-animation: rotation .6s infinite linear;
       -o-animation: rotation .6s infinite linear;
       animation: rotation .6s infinite linear;
       border-left:6px solid rgba(0,170,240,.25);
       border-left: 6px solid rgba(0,170,240,.25);
       border-right: 6px solid rgba(0,170,240,.25);
       border-bottom: 6px solid rgba(0,170,240,.25);
       border-top: 6px solid rgba(0,170,240,.6);
       border-radius:100%;
    }

link to plunkr: http://plnkr.co/edit/NcbPPcxL1rk0ZBKpbqZG?p=preview

Upvotes: 9

Views: 1644

Answers (2)

user4656987
user4656987

Reputation:

Not sure if it works but you can try.

Add a new filter

 app.filter('ngRepeatFinish', function($timeout){
return function(data){
    var me = this;
    var flagProperty = '__finishedRendering__';
    if(!data[flagProperty]){
        Object.defineProperty(
            data, 
            flagProperty, 
            {enumerable:false, configurable:true, writable: false, value:{}});
        $timeout(function(){
                delete data[flagProperty];                        
                me.$emit('ngRepeatFinished');
            },0,false);                
    }
    return data;
};
})

New function in your controller

$scope.$on('ngRepeatFinished', function(ngRepeatFinishedEvent) {
  $scope.showSpinner = false;
  $scope.$apply();
});

And your HTML

<tr ng-repeat="friend in (friends | ngRepeatFinish)"

Mind the parentheses

Upvotes: 1

luster
luster

Reputation: 148

you might also need to create your own directive for filtering the information, the default ng-filter is slow because it checks through all the fields on your objects.

you can create a custom ng-directive for filtering into your specific fields, take a look

Upvotes: 0

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