未加星标

Select2 Dependent / Cascading Select List (for v4.x)

字体大小 | |
[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二04 | 时间 2017 | 作者 红领巾 ] 0人收藏点击收藏

Select2 is one of the most popular select list plugin for jQuery . It has beautiful features and powerful customization options.

One missing feature of Select2 is built-in support for making select boxes cascading/dependent. In simple words, loadding/refreshing options of a select2 list box using ajax based on selection of another select2 list box So, I’ve written a reusable class for this purpose.

Get it here Select2 Cascade (for v4.x)

Looking for a demo?

Here is it live demo .

Thanks to Codepen , JSON Blob and Twitter Bootstrap for making demonstration so easy!

How to use

Simple.. just need to create a new instance of Select2Cascade by passing the following 3 things

Parent select2 listbox Child select2 listbox URL to load child items from

To set the parent selected value in ajax request, keep :parentId: as a placeholder in url. The selected value of parent select2 listbox will replace the :parentId: string in url. For example

Query string: /path/to/api?type=childType&parent_id=:parentId:
RESTful url: /path/to/api/items/:parentId:/sub-items

Another important point is, the response of ajax call MUST be a flat json object of value:label pairs. e,g,

{
20150415: "Chittagong Zila",
20190901: "Comilla Zila",
20221601: "Cox's Bazar Zila",
20301401: "Feni Zila"
}

Otherwise you have to adjust populating of options as per your response data.

Examples

Let’s say, our requirement is when selection of #parentList is changed, send ajax call to path/to/api/categories?parent_id=SELECTED-PARENT-VAL and set the options of #childList from the ajax response. Then sample usages will be

new Select2Cascade($('#parentList'), $('#childList'), 'path/to/api/categories?parent_id=:parentId:');

That’s all!The childList values will now load based on selection of parentList instantly. Even, you can chain the dependency like this

new Select2Cascade($('#district'), $('#zilla'), '/api/geocode/district/:parentId:/zilla');
new Select2Cascade($('#zilla'), $('#thana'), '/api/geocode/zilla/:parentId:/thana'); Oh wait.. there’s more!

If you want to do something with the response data or select boxes (after loading options), you can set (any number of) callbacks to be executed after the child listbox refreshed

var cascadLoading = new Select2Cascade($('#parentList'), $('#childList'), 'path/to/api/categories?parent_id=:parentId:');
cascadLoading.then( function(parent, child, items) {
// Open the child listbox immediately
child.select2('open');
// or Dump response data
console.log(items);
})

BTW, if you like this anyway, don’t forget to star the gist .

本文前端(javascript)相关术语:javascript是什么意思 javascript下载 javascript权威指南 javascript基础教程 javascript 正则表达式 javascript设计模式 javascript高级程序设计 精通javascript javascript教程

主题: RESTBootstrapjQueryTwitter
分页:12
转载请注明
本文标题:Select2 Dependent / Cascading Select List (for v4.x)
本站链接:http://www.codesec.net/view/531143.html
分享请点击:


1.凡CodeSecTeam转载的文章,均出自其它媒体或其他官网介绍,目的在于传递更多的信息,并不代表本站赞同其观点和其真实性负责;
2.转载的文章仅代表原创作者观点,与本站无关。其原创性以及文中陈述文字和内容未经本站证实,本站对该文以及其中全部或者部分内容、文字的真实性、完整性、及时性,不作出任何保证或承若;
3.如本站转载稿涉及版权等问题,请作者及时联系本站,我们会及时处理。
登录后可拥有收藏文章、关注作者等权限...
技术大类 技术大类 | 前端(javascript) | 评论(0) | 阅读(49)