What could be causing the RxJS Observable to malfunction within a Vue.js app container?

Can anyone explain why the RxJS Observable in the "whatever" div is functioning properly, while the one in the app div for Vue.js is not working?

(I am aware of modules that can bridge the gap between Vue.js and RxJS on NPM, but I am curious about why the simple scenario below fails when using just "plain old scripts").

To see this in action visit https://jsfiddle.net/3n1jw35x/ - you'll need to open the JS console to view the debug output.

<!DOCTYPE html>
<html>

<head>
  <title>Why is the RxJS Observable not working in the Vue.js app div?</title>
  <script src="https://unpkg.com/vue"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.4.3/Rx.js"></script>
</head>

<body>
  RxJS Observable works in a random div:
  <BR>
  <div id="whatever">
    <input id="input_in_div_whatever">
  </div>
  <div id="app">
    {{ message }}
    <BR>
    <input id="input_in_div_app">
  </div>

  <script>
    const input_in_div_whatever = $('#input_in_div_whatever');
    const content_whatever$ = Rx.Observable.fromEvent(input_in_div_whatever, 'keyup');
    content_whatever$.subscribe(e => {
      console.log('input_in_div_whatever works: ' + e.target.value.trim())
    });

    const input_in_div_app = $('#input_in_div_app');
    const content_app$ = Rx.Observable.fromEvent(input_in_div_app, 'keyup');
    content_app$.subscribe(e => {
      console.log('input_in_div_app - you will never see this: ' + e.target.value.trim())
    });

    var app = new Vue({
      el: '#app',
      data: {
        message: 'Why does RxJS Observable not work in the Vue.js app div?'
      }
    })
  </script>
</body>

</html>

Answer №1

In Vue, the template element provided is used for rendering. Attaching Rx functions to the element before Vue re-renders them is crucial. It's recommended to perform this attachment in the `mounted` hook for better results.

As a best practice, when other than Vue is involved in DOM manipulation, creating a wrapper component is advisable.

const input_in_div_whatever = $('#input_in_div_whatever');
const content_whatever$ = Rx.Observable.fromEvent(input_in_div_whatever, 'keyup');
content_whatever$.subscribe(e => {
  console.log('input_in_div_whatever works: ' + e.target.value.trim())
});


var app = new Vue({
  el: '#app',
  data: {
    message: 'Why does RxJS Observable not work in the Vue.js app div?'
  },
  mounted() {
    const input_in_div_app = $('#input_in_div_app');
    const content_app$ = Rx.Observable.fromEvent(input_in_div_app, 'keyup');
    content_app$.subscribe(e => {
      console.log('input_in_div_app - you will never see this: ' + e.target.value.trim())
    });

  }
})
<script src="https://unpkg.com/vue"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.4.3/Rx.js"></script>
RxJS Observable works in a random div:
<BR>
<div id="whatever">
  <input id="input_in_div_whatever">
</div>
<div id="app">
  {{ message }}
  <BR>
  <input id="input_in_div_app">
</div>

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

The issue with jspdf is that it is failing to generate PDF documents of

I'm currently developing a resume builder app using ReactJS. One of the functionalities I'm working on is enabling users to download their resumes as PDFs. However, I've encountered an issue with the generated PDFs when using jsPDF. The down ...

How to pass an array as parameters in an Angular HTTP GET request to an API

Hey there! I'm relatively new to Angular and I've hit a roadblock. I need to send an array as parameters to a backend API, which specifically expects an array of strings. const params = new HttpParams(); const depKey = ['deploymentInprogre ...

What is the best way to emphasize a link to the current page in vue.js?

I am working on a sidebar feature that displays several dynamically generated links (similar to creating notes and then linking to them): https://i.stack.imgur.com/1lxcy.png Users can add a new note by clicking the 'Add stage' button. The list ...

Grab the code snippet from JSFiddle

I apologize for the seemingly simple question, but I have been struggling with it. I tried looking at similar questions, but I couldn't find a solution. Despite copying the code from http://jsfiddle.net/sB49B/21/, I can't seem to get it to work ...

What is causing an error when using Array.push(), while Array.concat() works without any issues?

I'm attempting to merge an array with an existing array. The original data is structured like this: props: { ItemData: // This prop receives data from the parent component, which originates from a Vuex store. { type: Array, default: null ...

Responsive breakpoints in TailwindCSS seem to have an issue with applying padding and margin styles properly

Currently, I am tackling a project that involves creating a responsive design with Tailwind CSS on nuxtjs. Has anyone encountered the issue of py-8 applying to both breakpoints? If so, please share your insights! Here is how I have structured the compone ...

Node.js - Retrieving POST request parameters and directing users in an Express application

I encountered this specific issue while setting up a post endpoint for my nodejs CLI script that utilizes express to handle requests. app.use( express.static( path.format({dir: __dirname, base: 'client/dist'})) ); app.use( express ...

Using angularjs to include content from other files is known as

As I delve into the concept of creating directives in AngularJS, I am faced with the imminent end of Angular 1.x and the rise of Angular 2.x. The shift seems daunting, but I am determined to bridge this gap seamlessly. In my quest for clarity, I stumbled ...

The art of Vue JS displaying content

Learning how to make API requests using axios has greatly improved my ability to retrieve data in a client-side container and display it in my component template. It's been quite effective so far. Having worked with twig before, I can't help ...

What is the reason for this basic callback running before the setTimeout function?

Interesting behavior is observed in this code, where 'output 2' is logged before 'output 1' due to the setTimeout function. const func1 = () => { setTimeout(() => { console.log('output 1'); }, 3000); }; con ...

Overflow is causing interference with the scrollY value

I've been attempting to retrieve the scrollY value in my React app, but it seems to be affected by overflow-related issues. Below is the code snippet I used to access the scrollY value: import React from "react"; import { useEffect, use ...

Why do users struggle to move between items displayed within the same component in Angular 16?

Lately, I've been immersed in developing a Single Page Application (SPA) using Angular 16, TypeScript, and The Movie Database (TMDB). During the implementation of a movies search feature, I encountered an unexpected issue. Within the app\servic ...

Using third-party libraries like jQuery, CSS, and JavaScript in your React project by directly importing them into the index.html file can be a more efficient approach compared

When working with React, is it advisable to import external JavaScript, jQuery, and CSS files into the index.html file in the public folder? Are there any potential performance implications associated with this practice? I have utilized some jQuery functi ...

When using requirejs and vue.js together, the error message "Vue is not defined" may be encountered

My code snippet looks like this: <script type="text/javascript" src="../../node_modules/requirejs/require.js"></script> <script type="text/javascript" src="../../node_modules/vue/dist/vue.js"></script> <script>console.log(Vue ...

Determine the most recent API response and disregard any outdated responses from previous calls

I am currently working on a search page where the user can input text into a search box. With each character they enter, an ajax call is made to update the UI. However, I am facing an issue in determining the response from the last API call. For example, i ...

Implement a transition effect for when elements change size using the `.resizable().css` method

I attempted to incorporate a deceleration effect when resizing an element back to its original size using the resizable method. The slowdown effect should only trigger during the click event (when the "Click-me" button is pressed), not while manipulating ...

Is there a way to customize the color of an element within CardHeader in MUI?

Is there a way to customize the colors of {note.title} and {note.category}? I have attempted to do so by creating a theme: const theme = createTheme ({ palette: { category: { color: blue } } }) Unfortunately, this appro ...

Using ReactJS and Hooks to update state after the .map() function

Trying to update the state using values from an array. Here is an example: const [state, setState] = useState({}); const test = [1, 2, 3]; test.map((item, i) => { setState({ ...state, [`item-${i}`]: item }); }); The current s ...

Have developers created an event trigger for when google maps controls finish loading?

While I am aware of the tilesloaded event, it appears that the controls load after this event. My goal is to use jQuery to retrieve the controls, but I am struggling to identify the appropriate event to listen for. ...

JavaScript inserted into debug console by developer

Is there a method to troubleshoot code that has been added through the firefox developer console terminal? For example, I added document.onkeydown = function(event) { // code logic for checking keys pressed } If only I could determine which .js file t ...