Verifying whether an object has received any additional items

I am looking for a way to determine if an object has new subobjects. Specifically, I have an object with multiple nested objects and I want to check if the main object has any new objects added to it. Is there an existing method to achieve this?

methods: {
    playSound(newOrders, sound) {
      if (newOrders.length > 0) {
        if (sound) {
          var audio = new Audio(sound);
          audio.play();
        }
      }
    }

  },
  beforeUpdate() {
    this.playSound(this.newOrders, 'http://soundbible.com/mp3/Elevator Ding-SoundBible.com-685385892.mp3')
  },

My objective is to invoke the playSound function only when the newOrders object has new items. Currently, the code executes the function whenever the array changes, even if items are removed, which is incorrect. Any suggestions on how to correct this behavior?

javascriptarraysjsonvue.jsvuejs2

Answer №1

Implement the watch property to monitor any changes made to the object. For more information on how to use Vue's watch feature, simply search for "Vue watch" online to find the latest code examples.

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

Tips for storing and recalling a 24-hour countdown timer using Local Storage

I'm new to JavaScript and I have a 24-hour countdown timer that resets on page reload. However, I want to use LocalStorage to save the starting progress so that it continues running even if the page is closed or refreshed. The goal is for the timer to ...

javascriptjquery

What is the best way to access the data from a nested local JSON file in a Flutter application?

I am currently working on extracting nested values from a json file stored locally in Flutter. While I can retrieve the "outer" values successfully, I am facing challenges with accessing the "inner" ones. Despite researching extensively online and within ...

jsonflutterdart

Adding a fresh item to an array in Laravel 5.4

I'm attempting to append an object to a user model. The user model has the following parameter: User.posts. Where posts is an array. Firstly, I attempted the following: $user->posts()->save($Post); Although this didn't add the new Pos ...

arrayslaravel-5

Scripting issues detected in Safari and Microsoft Edge browsers

I recently finished developing an AngularJs Application that works flawlessly on Google Chrome and Mozilla Firefox. However, upon testing it on Safari and IE-11, I encountered errors in the console. One particular piece of code that causes issues is used ...

javascriptangularjsinternet-explorersafariecmascript-6

Ensuring that all popovers are horizontally aligned across the entire page

My Bootstrap form comes with several input fields, some of which are in multicolumn rows, and I would like them to display a popover upon focus. While the standard implementation allows me to show a popover next to the input field, my preference is to hav ...

javascriptcssbootstrap-4bootstrap-popover

The SQL Server encountered an issue while trying to convert a data type from nvarchar to decimal

When processing the code below, a JSON message is being opened and the value associated with the '$.disgust' field on the JSON message is being inserted into the post_metric_score table. Everything seems to be working fine, except when the value ...

sqljsonsql-server

What steps are needed to set up my Express server so that it can render all my content, rather than just my HTML file?

I need help setting up a server for my project using Express. Here is the structure of my file directory: root-directory ├── public │ ├── css │ │ └── styles.css │ ├── images │ │ └── img1.png | | └ ...

javascriptexpressserverfilepath

The standard process and organization of a project using AngularJS in conjunction with Python Flask

As someone new to the MV* client-side framework craze, I find myself leaning towards AngularJS over Knockout, Ember, or Backbone. However, I'm unsure about the workflow involved. Should I start by developing a client-side application in AngularJS and ...

javascriptpythonflaskangularjs

Having trouble interpreting JSON with Jquery

I am attempting to implement autosuggestion using Solr in conjunction with jQuery. Below is the code I have written for this purpose: $(function() { $( "#artist" ).autocomplete({ source: function( request, response ) { $.ajax({ ...

javascriptjqueryjsonsolr

Strange symbols were stored in the database after saving the textarea value

After submitting a form, text entered into a text area is being saved to my database. However, in one instance, certain characters such as • are appearing in the field. For example: • Text When retrieving the data from the database using Jav ...

javascriptjqueryhtmldatabasecharacter-encoding

AngularJS extension known as 'ngclipboard'

I've been attempting to utilize a plugin called ngclipboard in Angular, but something seems amiss as it's not functioning as expected. There are no error messages, however, the text from the input box is not being copied to the clipboard. To see ...

javascriptangularjs

What is causing these TypeScript type assertions to go unnoticed?

While reviewing type assertions, I noticed something interesting about the last three variable assignments - they don't produce errors. It's perplexing because I thought I was trying to change 'helo' into 'hello', which should ...

javascripttypescript

Key-based Freebase Query

Recently, I delved into Freebase and attempted the following Query: [{ "key": "Ehingen", "postal_codes": [], "/location/statistical_region/population": [{ "number": null, "year": null, "source": null }], "type": "/location/citytown" }] ...

jsonfreebasemql

Setting properties on functions and defining their prototype

My task involves working on the following block of code: function Vector(x, y) { this.x = x || 0; this.y = y || 0; } Vector.add = function(a, b) { return new Vector(a.x + b.x, a.y + b.y); }; Vector.sub = function(a, b) { return new Vecto ...

javascriptprototype

Find the current elapsed time using Wavesurfer in real time

I am currently utilizing the waveSurfer library created by katspaugh for playing audio files. In order to display 'elapsed time / total time', I have written code in the following manner: waveSurfer.on('play', function() { $scope.g ...

javascriptangularjshtml5-audio

Tips for eliminating wireframe diagonals from your design

After developing a custom CAD software exporter to transfer geometry data to the ThreeJS editor, I successfully created a loader to load the geometry. However, I encountered an issue when viewing the wireframe in ThreeJS - where triangles from each vertex ...

javascriptmath3dthree.js

Utilizing Ajax: Sending Customized Data to a Modal

Having never worked with jquery before, I struggled to find a solution for my specific case. On the cockpit.php page, I have a form that retrieves content from a mysql database. Currently, I am able to display this content in a div on the same cockpit.php ...

javascriptphpjqueryhtmlajax

Choosing a tab on a website using Python and Selenium

Displayed above is an image of tab codes found on a web page: https://i.sstatic.net/M54VH.png The tabs are named Overview, Information, and Audit (Please refer to the top part of the image). While I am able to open the tab by clicking with a mouse, I am f ...

javascriptpythonhtmljqueryselenium-webdriver

Running tests in JavaScript that are similar to Python's doctests

Are there any JavaScript testing frameworks that offer a similar functionality to Python's doctest? function multiply(x, y) { /** Returns the product of `x` and `y`: > multiply(4, 3) 12 The function handles string inputs by convert ...

javascripttestingdoctest

Remove the active class from a list item using History.js

My goal is to add the active class to a link when clicked in my AJAX app, triggering statechange on History.js. I'm struggling with saving the current active link(s) with the state so that the active class is appropriately added or removed when naviga ...

javascripthistory.js