1
0
mirror of synced 2024-11-22 21:16:10 +03:00
select2/docs/pages/08.selections/docs.md

87 lines
3.2 KiB
Markdown
Raw Normal View History

2017-09-03 03:34:47 +03:00
---
title: Selections
taxonomy:
category: docs
process:
twig: true
never_cache_twig: true
---
When an option is selected from the dropdown menu, Select2 will display the selected value in the container box. By default, it will display the `text` property of Select2's [internal representation of the selected option](/options).
2017-09-03 03:34:47 +03:00
## Templating
The appearance of selected results can be customized by using the `templateSelection` configuration option. This takes a callback that transforms the selection data object into a string representation or jQuery object:
<div class="s2-example">
<select class="js-example-templating js-states form-control"></select>
</div>
<pre data-fill-from=".js-code-example-templating"></pre>
<script type="text/javascript" class="js-code-example-templating">
function formatState (state) {
if (!state.id) {
return state.text;
}
2019-07-10 07:00:02 +03:00
2017-09-03 07:28:13 +03:00
var baseUrl = "{{ url('user://pages/images/flags') }}";
2017-09-03 03:34:47 +03:00
var $state = $(
2019-07-10 07:00:02 +03:00
'<span><img class="img-flag" /> <span></span></span>'
2017-09-03 03:34:47 +03:00
);
2019-07-10 07:00:02 +03:00
// Use .text() instead of HTML string concatenation to avoid script injection issues
$state.find("span").text(state.text);
$state.find("img").attr("src", baseUrl + "/" + state.element.value.toLowerCase() + ".png");
2017-09-03 03:34:47 +03:00
return $state;
};
$(".js-example-templating").select2({
templateSelection: formatState
});
</script>
>>> You may find it helpful to use a client-side templating engine like [Handlebars](http://handlebarsjs.com/) to define your templates.
### Built-in escaping
By default, strings returned by `templateSelection` are assumed to **contain only text** and will be passed through the `escapeMarkup` function, which strips any HTML markup.
If you need to render HTML with your selection template, you must wrap your rendered selection in a jQuery object. In this case, the selection will be passed [directly to `jQuery.fn.append`](https://api.jquery.com/append/) and will be handled directly by jQuery. Any markup, such as HTML, will not be escaped and it is up to you to escape any malicious input provided by users.
>>>> Anything rendered as a selection is templated. This includes placeholders and pre-existing selections that are displayed, so you must ensure that your templating functions can support them.
2017-09-03 03:34:47 +03:00
## Limiting the number of selections
Select2 multi-value select boxes can set restrictions regarding the maximum number of options that can be selected. The select below is declared with the `multiple` attribute with `maximumSelectionLength` in the select2 options.
<div class="s2-example">
<p>
<select class="js-example-basic-multiple-limit js-states form-control" multiple="multiple"></select>
</p>
</div>
<pre data-fill-from=".js-code-placeholder"></pre>
<script type="text/javascript" class="js-code-placeholder">
$(".js-example-basic-multiple-limit").select2({
maximumSelectionLength: 2
});
</script>
## Clearable selections
When set to `true`, causes a clear button ("x" icon) to appear on the select box when a value is selected. Clicking the clear button will clear the selected value, effectively resetting the select box back to its placeholder value.
2017-09-03 03:34:47 +03:00
```
$('select').select2({
placeholder: 'This is my placeholder',
allowClear: true
});
```