Compare the current return value to the previous value in the success callback of an Ajax request

I am currently running an Ajax request to a PHP DB script every 3 seconds, and I need to make a decision based on the result returned. The result is a timestamp. Let's say the ajax request is fired two times. I want to compare the first result with the second result. If they match, I need to do one thing; if they don't match, I need to do something else.

success:function(msg){
            console.log(msg);
        }

I have attempted to define another variable and store the value of msg in it to compare with the next value of msg, but the variable ends up changing along with the value of msg.
How can I retrieve both the previous and next values simultaneously for comparison?

javascriptajax

Answer №1

Save the outcome in a variable.

var previousOutcome;
$.ajax({
   ...
   success:function(response){
       if (previousOutcome === response) {
          ...
       }
       else {
          ...       
       }
       previousOutcome = response;
   }
});

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

Designing a sequential bar graph to visualize intricate data using AmCharts

I received the following response from the server in JSON format: [{ "data1": { "name": "Test1", "count": 0, "amount": 0, "amtData": [ 0,0,0,0 ], "cntData": [ 0,0,0,0 ], "color": "#FF0F00" }, "data2": { ...

javascriptjqueryamcharts

Creating an application for inputting data by utilizing angular material and javascript

I am looking to create an application using Angular Material Design, AngularJS (in HTML), and JavaScript. The application should take input such as name, place, phone number, and email, and once submitted, it should be stored in a table below. You can fin ...

javascripthtmlangularjs

While running tests on a React project, the `npm test` command is successful, but unfortunately,

I created a new react app using create-react-app and included some basic components and tests. The tests work fine when running 'npm test', but I encounter an 'Unexpected token' error when using Jest to run the tests with imported compo ...

javascriptnode.jsreactjsjestjs

The intricate scripting nestled within the jQuery function

When using jQuery, I am looking to include more codes within the .html() function. However, I also want to incorporate PHP codes, which can make the writing style quite complex and difficult to read. Is it possible to load an external PHP/HTML script? fu ...

javascriptjqueryhtmlajax

Numerous Axios GET calls made by various components

I am facing an issue where I have two different components rendering on the main screen. Both of them make multiple axios.get requests to fetch data. However, upon initial page load, only the last component successfully retrieves the data while the first c ...

javascriptnode.jsreactjsexpressaxios

Preventing Cross-Site Scripting (XSS) when injecting data into a div

I am using Ajax to fetch data in JSON format and then parsing it into a template. Here is an example of the function: function noteTemplate(obj) { var date = obj.created_at.split(/[- :]/), dateTime = date[2] + '.' + date[1] + '. ...

javascriptjqueryxss

Determine if an object has been submitted in a MEAN / AngularJS application

I am working with an AngularJS frontend and using Express, Node, and MongoDB on the backend. My current setup is as follows: // my data to push to the server $scope.things = [{title:"title", other properties}, {title:"title", other properties}, {titl ...

javascriptangularjsnode.jsmongodbexpress

How can I use regular expressions to validate one-letter domain names?

I am in the process of developing a validation rule for my C# MVC Model using Regex. [RegularExpression(@"(\w[-._+\w]*\w@\w{1,}.\w{2,3})", ErrorMessage = "* Email Address: Please enter a valid Email Address.")] public virtual stri ...

c#javascriptregexemail

Send information from the textbox

I am trying to extract data from an input field and use it to create a QR code. While passing the value as text works, I am facing issues with passing the actual input value. Does anyone have a straightforward example of this process? import React, {Comp ...

javascriptreactjs

Keystroke to activate Ant Design Select and start searching

I'm currently using the 'react-hotkeys-hook' library and have successfully implemented a hotkey that logs in the console when triggered (via onFocus()). My goal now is to use a hotkey that will open a Select component and add the cursor to i ...

javascriptreactjshotkeys

Clicking the React Todo Delete Button instantly clears out all tasks on the list

I am dealing with 2 files: App.js import React, { Component } from 'react'; import './App.css'; import ToDo from './components/ToDo.js'; class App extends Component { constru ...

javascriptreactjs

How should we provide the search query and options when using fuse.js in an Angular application?

Having previously utilized fuse.js in a JavaScript project, I am now navigating the world of Angular. Despite installing the necessary module for fuse.js, I'm encountering difficulties implementing its search functionality within an Angular environmen ...

javascriptangulartypescriptangular8fuse.js

Retrieve the latest entry from a JSON file containing epoch timestamps

Currently, I am in the process of developing an app using angularjs. In my json data, I have timestamps and corresponding values like below: { "dps": { "1455719820": 0, "1455720150": 0, "1455720480": 0, "1455720810": 0, " ...

javascriptangularjsjson

What is the best way to automatically show scrollbars when a page loads using JavaScript?

How can I make the vertical scrollbar appear as soon as the page loads using javascript? I am currently using a jquery slide toggle animation that causes the vertical scrollbar to show up because it makes the page longer. However, when the scrollbar appear ...

javascriptjqueryhtml

Is it possible to create Interactive Tabs using a Global BehaviorSubject?

Trying to adjust tab visibility based on different sections of the Ionic app, an approach involving a global boolean BehaviorSubject is being utilized. The encapsulated code has been condensed for brevity. In the provider/service globals.ts file, the foll ...

javascriptangularionic-frameworkionic2

Discovering the quantity of identical elements within a JavaScript array

Looking for some assistance in solving a JavaScript problem as I am relatively new to the language: I have an array and I need help in determining the count of identical values. Below is my array: var arr = ["red", "blue", "green", "red", "red", "gray"] ...

javascripthtml

Tips for utilizing the "this" keyword in JavaScript

Here's a snippet of code that I'm having trouble with: this.json.each(function(obj, index) { var li = new Element('li'); var a = new Element('a', { 'href': '#', 'rel': obj ...

javascriptmootoolsthis

Storing and Retrieving Cookies for User Authentication in a Flutter Application

I am currently working on developing a platform where, upon logging in, a token is created and stored in the cookie. While I have successfully implemented a route that stores the cookie using Node.js (verified in Postman), I encounter issues when attemptin ...

javascriptnode.jsflutterexpress

What is the best way to choose a single item from an array using jQuery?

Within an array, I have IDs and descriptions like: var tablica = [{"3":"asdasd asd"},{"19":"asddas fff"},{"111111":"adas asf asdff ff"},{"4":"re"},{"5":"asdasd"},{"6":"we"},{"7":"asdasdgg"},{"9":"asdasdasd"},{"16":"sdads"},{"10":"asdgg"},{"11":"ggg"}]; ...

javascriptjqueryarrays

What is the resolution process for importing @angular/core/testing in TypeScript and what is the packaging structure of the Angular core framework?

When using import {Injectable} from '@angular/core';, does the module attribute in package.json point to a file that exports injectable? Also, for the format @angular/core/testing, is there a testing folder within @angular/core that contains anot ...

javascriptangularnpm