To prevent multiple requests to the server, limit the number of requests received if a user clicks on a list too quickly

I need some assistance. I have been working on tracking user clicks. The issue is that I have a list where users can click to fetch data from the server. However, when multiple users click simultaneously, it results in multiple requests being sent to the server.

What I am aiming for is to ensure only one request is made to the server upon each click.

So far, this is what I have implemented:

function retrieveData(id) {
        _this.previousClickId = _this.currentId;
        dataFactory.retrieveListOfData(id).then(function(response) {
            if(_.isEqual(_this.previousClickId, id)){
                displayData(response);
            } else {
                retrieveData(executionId);
            }
        });
        _this.currentId = id;
    }

Below is the HTML code:

<ul>
 <li ng-click="retrieveData(1)">option1</li>
 <li ng-click="retrieveData(2)">option2</li>
</ul>

Answer №1

Perhaps this tactic could be the solution you're seeking.

To start, determine the desired number of clicks allowed per second. Let's assume it's set at two for now.

var clickLimit = 2;

Additionally, keep track of the total number of clicks taking place.

var clickCount = 0;

Increment the clickCount each time a user clicks on something.

Next, establish an interval that deducts one click from the count every second.

var clickInterval = setInterval(function () {

    if (clickCount != 0) { clickCount -= 1; }

}, 1000);

Finally, enclose your code within an if condition that compares the clickCount with the established clickLimit.

if (clickCount <= clickLimit)
{
    // perform action
}

An alternative and potentially more efficient approach involves using a boolean value to enable or disable clicking functionality. Utilize an interval to reset the boolean to true periodically.

Answer №2

Prevent repeated clicks on input fields

To prevent users from clicking multiple times on input elements, one effective method is to utilize the ng-disabled directive in AngularJS. This directive can disable the submit button while a request is being processed.

<button ng-click="fetchData(id)" ng-disabled="processing">
   Submit
 </button>
$scope.fetchData = fetchData;

function fetchData(id) {
    $scope.processing = true;
    dataService.getDataList(id)
        .then(function(response) {
            console.log("Request successful!");
        }).catch(function(response) {
            console.log("Error occurred");
            throw response;
        }).finally(function() {
            $scope.processing = false;
        });
}

By disabling the Submit button during processing, any additional clicks will be disregarded until the operation completes.


Avert multiple clicks on non-input elements

For elements other than inputs, you can indicate their inactive state using the ng-style directive and prevent clicks while disabled:

<div ng-click="handleAction(id)" ng-style="processing ? {opacity:'0.4'} : ''">
   Get {{id}}
</div>
$scope.handleAction = handleAction;

function handleAction(id) {
    if ($scope.processing) return;
    $scope.processing = true;
    dataService.getDataList(id)
        .then(function(response) {
            console.log("Operation successful!");
        }).catch(function(response) {
            console.log("An error occurred");
            throw response;
        }).finally(function() {
            $scope.processing = false;
        });
}

While a request is ongoing, further clicks on the element will be ignored and its appearance will be faded.

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