How to do polling in ember.js component?

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by addison , in category: Javascript , a month ago

How to do polling in ember.js component?

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1 answer

Member

by mac , a month ago

@addison 

To create a polling functionality in an Ember.js component, you can use the Ember.run.later method to schedule a function to run at regular intervals. Here's an example of how you can implement polling in an Ember.js component:

  1. Create a new Ember.js component:
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ember g component my-polling-component


  1. Update the template for the component with the following code:
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// app/templates/components/my-polling-component.hbs

{{!-- Use the Ember run loop to periodically call the fetchData method --}}
{{#if isPolling}}
  {{fetchData}}
{{/if}}


  1. Update the component code in app/components/my-polling-component.js:
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import Component from '@ember/component';
import { run } from '@ember/runloop';

export default Component.extend({
  isPolling: true,

  fetchData() {
    // Perform the data fetching logic here
    console.log('Fetching data...');

    // Schedule the next fetch operation
    run.later(this, this.fetchData, 5000); // Fetch data every 5 seconds
  },

  init() {
    this._super(...arguments);

    this.fetchData();
  },

  willDestroy() {
    this._super(...arguments);

    this.set('isPolling', false);
  }
});


In this example, we define a fetchData method that performs the data fetching operation. Inside the init method of the component, we schedule the fetchData method to run every 5 seconds using Ember.run.later. We also set the isPolling property to false in the willDestroy hook to stop the polling when the component is destroyed.


This way, the fetchData method will be called every 5 seconds to fetch new data, creating a polling effect in the Ember.js component.