Search code examples
ember.jsember-bootstrap

ember-bootstrap: Navbar component repeats itself 12 times

I am using ember-bootstrap's Navbar example code in a simple Ember test app:

{{#bs-navbar as |navbar|}}
  <div class="navbar-header">
    {{navbar.toggle}}
    <a class="navbar-brand" href="#">Brand</a>
  </div>
  {{#navbar.content}}
    {{#navbar.nav as |nav|}}
      {{#nav.item}}
        {{#nav.link-to "home"}}Home{{/nav.link-to}}
      {{/nav.item}}
      {{#nav.item}}
        {{#nav.link-to "navbars"}}Navbars{{/nav.link-to}}
      {{/nav.item}}
    {{/navbar.nav}}
  {{/navbar.content}}
{{/bs-navbar}}

However I'm having strange results; the navbar is showing up 12 times in my page. For what it's worth, the toggle button doesn't do anything either - but that might be connected to the reason the navbar appears 12 times. See the following screenshot:

Screenshot from simple test page

Here are the steps I took to set up this project:

  1. ember new bootstrap-test
  2. Inside /bootstrap-test:
    1. ember install ember-bootstrap
    2. ember g ember-bootstrap --bootstrap-version=4

Here is the contents of my ember-cli-build.js file:

/* eslint-env node */
'use strict';

const EmberApp = require('ember-cli/lib/broccoli/ember-app');

module.exports = function(defaults) {
  let app = new EmberApp(defaults, {
    'ember-bootstrap': {
      'bootstrapVersion': 4,
      'importBootstrapFont': false,
      'importBootstrapCSS': false
    }
  });

  // Use `app.import` to add additional libraries to the generated
  // output files.
  //
  // If you need to use different assets in different
  // environments, specify an object as the first parameter. That
  // object's keys should be the environment name and the values
  // should be the asset to use in that environment.
  //
  // If the library that you are including contains AMD or ES6
  // modules that you would like to import into your application
  // please specify an object with the list of modules as keys
  // along with the exports of each module as its value.

  return app.toTree();
};

Finally, I'm using ember-cli version 2.14.2. Any help to figure this out would be greatly appreciated. Thank you!

Solution

  • It might be caused by re-rendering due to property update in didRender or didInsertElement hook. If that's the case then you surely you will get assertion error in console.

    I always look for the first error, if there is more no of errors reported in the console. that helped me a lot in my development.