Skip to main content

How to make addEventListener stream continuously on button submit

I am trying to stream a list of json objects from my servers endpoint to my frontend using javascript and html. Below is my code. Currently addEventListener works fine when I click my form button (HTML also added below for reference). Heres my problem:

The list of objects my server endpoint returns is a single list which is continuously having objects appended to the list. So I want my front end to refresh automatically every second to show the latest version. And so I am finding a way for my addEventListener to rerun the function each time after clearing the HTML it is pushing. Currently, I have to click on my button to achieve that and the previously pushed HTML is not getting cleared either. So each time I click on the button, I am getting all the existing HTML displayed as many times as I have clicked the button (old versions) plus the latest version of my endpoint data.

The solution I want to achieve is to be able to click on my start stream button once, and have the function run every X seconds after clearing the older data each time to only show the latest list returned by fetch.

const startStream = document.querySelector('form')
const messageOne = document.querySelector('#message-1')

startStream.addEventListener('submit', (e) => {
    e.preventDefault()

    messageOne.textContent = 'Streaming...'

    function fetchData() {
        fetch('http://localhost:1337/dashboard')
        .then(response => {
            if (!response.ok) {
                throw Error('ERROR')
            }
            response.json().then(events => {
            events.forEach(event => {
                const html = `<div class="event">
                    Event: ${event.name}
                </div>
                `
                let div = document.createElement('div');
                div.setAttribute("id", "app");
                div.innerHTML = html;
                document.body.appendChild(div);

          })
    })
        .catch(error => {
            console.log(error)
        })
    })
}
   fetchData()
})

Here is the HTML:

<!DOCTYPE html>

<html>
    
<head>
    <link rel="stylesheet" href="./css/styles.css">
</head>

<body>
    <h1>Dashboard</h1>
    
    <form>
        <button>Start Stream</button>
    </form>

    <p id="message-1"></p>
    
    <script src='./js/app.js'></script> 
</body>

</html>
Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more

ValueError: X has 10 features, but LinearRegression is expecting 1 features as input

So, I am trying to predict the model but its throwing error like it has 10 features but it expacts only 1. So I am confused can anyone help me with it? more importantly its not working for me when my friend runs it. It works perfectly fine dose anyone know the reason about it? cv = KFold(n_splits = 10) all_loss = [] for i in range(9): # 1st for loop over polynomial orders poly_order = i X_train = make_polynomial(x, poly_order) loss_at_order = [] # initiate a set to collect loss for CV for train_index, test_index in cv.split(X_train): print('TRAIN:', train_index, 'TEST:', test_index) X_train_cv, X_test_cv = X_train[train_index], X_test[test_index] t_train_cv, t_test_cv = t[train_index], t[test_index] reg.fit(X_train_cv, t_train_cv) loss_at_order.append(np.mean((t_test_cv - reg.predict(X_test_cv))**2)) # collect loss at fold all_loss.append(np.mean(loss_at_order)) # collect loss at order plt.plot(np.log(al...
Post a Comment
Read more