The function angular.element() is unable to locate the specified DOM element

My dilemma lies in the fact that I have a dynamic table of users extracted from a Firebase database:

<table id="users">
    <thead>
       ...
    </thead>
    <tbody>
       <tr ng-repeat="user in users">
          <td data-user-id="{{user.$id}}">{{user.$id}}</td>
       </tr>
    </tbody>
</table>
function loadUsers($scope, DatabaseFactory) {
    DatabaseFactory.users.on('value', function(snapshot) {
        var users = snapshot.val();

        for(var id in users) {
            var user = users[id];

            // Locate cell with user ID
            var element = angular.element('#users tr td[data-user-id="' + user.id + '"]'); // 1
            console.log(element); // 2
        }
    });
};

In loadUsers(), my objective is to identify a cell containing a specific user ID. The issue arises when the log statement returns an array with length 0. Why does this discrepancy occur? Interestingly, when I execute statements 1 and 2 in the Chrome console, they yield the desired outcome.

Answer №1

To ensure proper execution, it is recommended to place your loop inside the viewContentLoaded event handler. This will help with handling asynchronous operations smoothly.

$scope.$on('$viewContentLoaded', function () {
    for (var key in users) {
        var user = users[key];

        // Locate cell with user ID
        var element = angular.element('#users tr td[data-user-id="' + user.id + '"]'); // Line 1
        console.log(element); // Line 2
    }
});

Answer №2

One thing that really helped me was converting loadUsers() into a directive. This way, it gets triggered after creating the DOM elements using ngRepeat.

Here's how I implemented it:

<tr ng-repeat="user in users" load-users>

In my Angular code:

var app = angular
    .module('app', ['firebase'])
    .directive('loadUsers', loadUsers);


function loadUsers($scope, DatabaseFactory) {
    return function(scope, element, attrs) {
        if (scope.$last) {
           // Do something here...
        }
    }
};

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