Utilize the passed value within the $scope.$on function

When I use broadcast to send data, I encounter an issue. Here is the code snippet:

$rootScope.$broadcast('myEvent',{
   data:"value"
 });

Now, here is my 'on' code:

$scope.$on('myEvent', (event, args) => {
     $scope.data = args.data;
     console.log($scope.data);
  });
  console.log($scope.data);

The problem arises when the console.log inside the function correctly displays the value, but outside it shows undefined. What could be causing this discrepancy? Any suggestions are appreciated. Thank you.

Answer №1

Your code includes an asynchronous callback function:

(event, args) => {
  $scope.data = args.data;
  console.log($scope.data);
}

This means that the code will only execute when triggered by the myEvent. The second console.log() statement will immediately run once the script and line are loaded in the browser, making it a synchronous part of your code. In contrast, the asynchronous callback will wait to execute until the event is triggered.

If you're unfamiliar with how callbacks function in JavaScript, I recommend reading up on them here. Understanding callbacks is essential for working effectively with JavaScript and will be beneficial for your future projects.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Unable to establish connection with Uploadthing due to a timeout error

I am facing timeout errors while setting up the upload feature. app/api/uploadthing/core.ts import { createUploadthing, type FileRouter } from "uploadthing/next"; import { auth } from "@clerk/nextjs"; const handleAuth = () => { c ...

Is it possible to refresh the $stateParams in Angular UI Router without having to reload the ui-view component?

Exploring the context of Angular and ui-router, we have a root view constructed with 3 named ui-views in our index.html. <body> <div ui-view='left'> <div ui-view='center'> <div ui-view='right'> & ...

In production, all Next.js API routes consistently return an "Interval Server Error," whereas in development, all routes operate smoothly without any issues

Every time I access any API route in my Next.js application in production, it results in a 500 "Internal Server Error". However, in development mode, all routes function smoothly and provide the expected output. https://i.stack.imgur.com/nPpeV.png https: ...

Looking for the location of a matching brace in a dataset?

As a newbie in the world of coding, I have embarked on learning about NodeJs file system module. Currently, my focus is on handling a large data file stored as a string. The challenge that I am facing is with locating the matching close brace and its pos ...

Where should we place the JavaScript reference in our CSHTML file in an MVC framework?

At the beginning of our .cshtml page in our current web application, we have included the following: @using Carwale.UI.PresentationLogic; @model Carwale.Entity.ViewModels.HomeModel @{ ViewBag.CustomJS = "~/Views/StaticPartials/HomeScripts.cshtml"; ...

What is the best way to use a CSS class in my script specifically for specific screen sizes?

Utilizing bootstrap 4, my code is executing a for loop to generate eight divs with the class "item". To display five items per row, I am using the class "col-2". However, this results in six items being shown in a single row. Since I cannot include the o ...

Is there a noSQL database that clients can easily access?

I am in the process of creating a basic angular application that includes a small administrator panel for updating content through a .json file. I am searching for a solution to edit the json document directly from the administrator panel. While I am able ...

Pass a PHP string to a JavaScript function using AJAX

Recently, I encountered an issue with my database storing email content. To retrieve this content, I made an ajax request and wanted to pass the data to a function that would display a popup with the email content. However, the email content contains HTML ...

What is the reason for multiple ajax functions being triggered when submitting a form through ajax?

I have a Drupal form with an AJAX submit. Additionally, I have another jQuery $.get function that sends a request every 2 minutes and inserts the response into an HTML element. The form and this JavaScript code are independent of each other, performing sep ...

Customize menu items in Angular ui-grid when right clicking on a cell

Seeking help with Angular UI-grid for a specific feature needed: I want to display a custom menu when a user right-clicks on a specific 'CELL/Column' in the grid, such as 'B' in the example image below. When the user right-clicks, the ...

Is there a way to dynamically enhance a JSON child array with additional value?

I am currently working on implementing a filter system similar to the one shown in the image. This project is being developed using Angular JS framework and JQuery. The main requirement is to have checkbox filters for Application Name, Status, and so on. ...

Is it possible for object destructuring in Javascript to include dynamic non-rest keys using ...rest?

Suppose we have an object: const obj = { key1: "value1", key2: "value2", key3: "value3", key4: "value4" }; My goal is to filter out specific keys from this object to create a smaller one. I am aware of the following ...

Utilizing the invoke() method within the each() function in Cypress to access the href attribute

I recently started using Cypress and I'm attempting to retrieve the href attribute for each div tag within a group by utilizing invoke(), however, it is resulting in an error. Could anyone provide guidance on the correct way to achieve this? cy.get(&a ...

The Next.js developer encounters an issue where the build fails due to a ReferenceError on a client component, stating that "window

Just starting out with nextjs, I'm sticking to using only the basic features without diving into any advanced functionalities. During the next build process, I encountered an issue where 6 paths failed because of a ReferenceError: window is not defin ...

The act of binding is not functioning

Hello everyone, I am excited to be posting on stackoverflow for the first time. Recently, I have started learning ember.js and I am really enjoying it. Currently, I am working on a small project to practice my ember.js skills, but I seem to be having tro ...

How can Angular prevent displaying 404 errors in the console by utilizing fallback mechanisms?

I have implemented a custom directive that loads a backup image source if the initial one returns a 404 error. Here is the code for the directive: .directive('errSrc', function() { return { link: function(scope, element, attrs) { ...

The React.js Redux reducer fails to add the item to the state

I'm just starting to learn about React.js and Redux. Currently, I am working on creating a basic shopping cart application. https://i.stack.imgur.com/BfvMY.png My goal is to have an item (such as a banana) added to the cart when clicked. (This sho ...

The CSS transition duration is not being applied properly on the initial transition effect

Looking to create a dynamic set of sliding divs that can be triggered with the press of a button. Each div will contain a thumbnail image and accompanying text. The goal is to enable the user to navigate through the content by clicking the left or right bu ...

Package tracking static document within javascript module

I'm currently working on a project in parcel that involves three.js. It appears that I am having trouble loading a 3D model due to an incorrect path issue. My model is located in src/assets/models/mymodel.obj and I am attempting to use it within the ...

Is it possible to have setTimeOut() executed after the page has been redirected?

Why is it not possible to duplicate: The question was not addressed in the previous post. I have a link for deletion, which, when clicked, triggers a popup with a button. Upon clicking that button, the page inside the popup redirects to a new internal pag ...