d8d2aa5b03
This is how it used to work pre-4.0.9, where the bound handlers for resizing and positioning the dropdown were bound at the first time that the dropdown was opened. This was changed for the 4.0.9 release as a part of 3f75227a693 where it was not clear why this late binding was happening, so it was removed to simplify the code. The late binding is necessary because the handlers within results for generating the results, and thus the content within the dropdown, are bound after the handlers for the dropdown are bound. This results in situations where the handlers for positioning the dropdown are bound before the dropdown is updated with content, resulting in the positioning being calculated for the old content and thus being incorrectly placed. By binding the positioning handlers after the dropdow is opened for the first time, we can ensure that the positioning handlers are bound after the result handlers, so we won't have to worry about this issue. The handlers are only bound once because they only need to perform all the calculations a single time. There is no need to keep checking all of the calculated styles more than we need to, so this is guarded by a flag which ensures it is only bound a single time per dropdown. Fixes #5619 Fixes #5620
Select2
Select2 is a jQuery-based replacement for select boxes. It supports searching, remote data sets, and pagination of results.
To get started, checkout examples and documentation at https://select2.org/
Use cases
- Enhancing native selects with search.
- Enhancing native selects with a better multi-select interface.
- Loading data from JavaScript: easily load items via AJAX and have them searchable.
- Nesting optgroups: native selects only support one level of nesting. Select2 does not have this restriction.
- Tagging: ability to add new items on the fly.
- Working with large, remote datasets: ability to partially load a dataset based on the search term.
- Paging of large datasets: easy support for loading more pages when the results are scrolled to the end.
- Templating: support for custom rendering of results and selections.
Browser compatibility
- IE 8+
- Chrome 8+
- Firefox 10+
- Safari 3+
- Opera 10.6+
Usage
You can source Select2 directly from a CDN like JSDliver or CDNJS, download it from this GitHub repo, or use one of the integrations below.
Integrations
Third party developers have created plugins for platforms which allow Select2 to be integrated more natively and quickly. For many platforms, additional plugins are not required because Select2 acts as a standard <select> box.
Plugins
- Django
- Drupal - drupal-select2
- Meteor - meteor-select2
- Ruby on Rails - select2-rails
- Wicket - wicketstuff-select2
- Yii 2 - yii2-widget-select2
- Angularjs - mdr-angular-select2
Themes
- Bootstrap 3 - select2-bootstrap-theme
- Bootstrap 4 - select2-bootstrap4-theme
- Flat UI - select2-flat-theme
- Metro UI - select2-metro
Missing an integration? Modify this README and make a pull request back here to Select2 on GitHub.
Internationalization (i18n)
Select2 supports multiple languages by simply including the right language JS
file (dist/js/i18n/it.js, dist/js/i18n/nl.js, etc.) after
dist/js/select2.js.
Missing a language? Just copy src/js/select2/i18n/en.js, translate it, and
make a pull request back to Select2 here on GitHub.
Documentation
The documentation for Select2 is available
through GitHub Pages and is located within the separate select2/docs repository.
Community
You can find out about the different ways to get in touch with the Select2 community at the Select2 community page.
Copyright and license
The license is available within the repository in the LICENSE file.