Large Table

components.x-cell.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'tr',
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    this.data = [];
    for (let i = 0; i < 3000; i++) {
      this.data.push({
        a: 'a',
        b: 'b',
        c: 'c',
        d: 'd',
        e: 'e',
        f: 'f',
        g: 'g',
        h: 'h',
        i: 'i',
        j: 'j',
        k: 'k',
        l: 'l',
        m: 'm',
        n: 'n',
        o: 'o',
      });
    }
    this.columns = Object.keys(this.data[0]);
  },
});

templates.application.hbs

<table>
  <thead>
    {{#each columns as |column|}}
      <th>{{column}}</th>
    {{/each}}
  </thead>
  <tbody>
    {{#each data as |record|}}
      {{component 'x-cell' record=record columns=columns}}
    {{/each}}
  </tbody>
</table>

templates.components.x-cell.hbs

{{#each columns as |column|}}
  <td>{{get record column}}</td>
{{/each}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.6",
    "ember-template-compiler": "3.4.6"
  }
}