AngularJS在单击按钮时动态添加li元素

Question

Im trying to dynamically add an li element on each button click. But the new li element is not getting created. Im trying to use ng-repeat to acheive the same. Below is my code

html code

<div data-ng-app="myApp" data-ng-controller="TestController" >
<div ng-show="showQuerydiv" id="qscompid" style="margin-left:170px;margin-top:90px">
    <div class="btn-group" id="buttonOptions" style="width: 100%; position:absolute;">
    <a href="#" class="btn btn-primary" ng-click="openQuerydiv('query')">Query</a>
    <a href="#" class="btn btn-primary" ng-click="openQuerydiv('script')">Script</a>
    <a href="#" class="btn btn-primary" ng-click="openQuerydiv('compare')">Comp</a>
    <div style="float: right; width: 30%">
    <a href="#operationDetailInfo" class="glyphicon glyphicon-info-sign"  data-toggle="collapse" style="float: left;" title="Info"></a>
    <div  id="operationDetailInfo" class="collapse" style="width: 95%; float: left;">
    </div>
    </div>
    <br>
    <div id="sqlQueryDiv" ng-show="isShow" style="width: 100%;margin-top: 30px;margin-left: -170px;">
        <ul class="nav nav-tabs" role="tablist" id="queryULId" style="width: 1140px;height: 39px;">
            <li class="active" ng-repeat="tabs in tabcount">
                <a href="#queryTab"+{{tabCount}} role="tab" data-toggle="tab">
                {{tabName}}{{tabCount}}
                </a>
                <span  class="close" style="font-size: 12px; position: absolute; margin-left: 85%; margin-top: -25%; cursor: pointer;">X</span>
        </li>
    </ul>
    <div class="tab-content" style="width:1177px;height: 225px;">

    </div> 
    </div>
    </div>
</div>

Angular js code

var app = angular.module('myApp', []);
app.controller('TestController', function($scope){
console.log('Going for execution ');
$scope.tabCount = 0 ;
$scope.showQuerydiv = true;
$scope.isShow = false;
$scope.list =" " ;
$scope.openQuerydiv = function(parameter)
{
    alert("inside the openqueryDiv") ;
    if(parameter == 'query')
{
     alert("inside the openquerydiv" + parameter);
     $scope.isShow=true;
     $scope.tabName='SQL Query';
     $scope.tabCount++ ;

 }
 }
 }); 

In the above code, on click of the Query button, the first time, the tab gets created. On the second click, the same tab gets modified instead of creating a new tab. Can you please let me know how to acheive the same. on each button click, I want a new tab to be created.

Any help on this is much appreciated.

Answer 1

You are doing ng-repeat="tabs in tabcount" while tabcount is a number, ngRepeat needs to iterate over an iterable variable, such as list or an object.

From the docs

The ngRepeat directive instantiates a template once per item from a collection. Each template instance gets its own scope, where the given loop variable is set to the current collection item, and $index is set to the item index or key.

Try to instantiate tabcount as an empty array

$scope.tabcount = [];

Inside the onClick function push objects like this

$scope.openQuerydiv = function(parameter) {
    $scope.tabcount.push({
         type: parameter,
         link: "some_link.html",
         name: "some name"
    });
}

And iterate on that list in the html using ngRepeat

<li class="active" ng-repeat="tabs in tabcount">
     <a href="{{tabs.link}}" role="tab" data-toggle="tab">
     {{tabs.name}}
     </a>
     <span  class="close" style="font-size: 12px; position: absolute; margin-left: 85%; margin-top: -25%; cursor: pointer;">X</span>
</li>