jQuery Select2插件版本检查 [英] Jquery Select2 plugin version check

问题描述

在我的项目中，我检查是否以这种方式加载了Select2插件

In my project I check if the Select2 plugin was loaded in this way

if (jQuery().select2)

但是现在我将尝试验证加载了哪种版本的Select2插件(3.5.X或4.X).我想也许您可以检查是否存在版本4.X中引入的选项/功能，而该选项/功能在版本3.5.X中不存在. 根据您的说法，这可行吗?我该怎么办?谢谢

But now I will try to verify what kind of version (3.5.X or 4.X) of Select2 plugin was loaded. I thought maybe you could check if there is an option/function introduced in version 4.X that is not present in the version 3.5.X. According to you, is it doable? How might I do it? Thank you

推荐答案

Select2 4.0中有一个新的isOpen方法.

There is a new isOpen method in Select2 4.0.

您可以在开发人员工具栏中使用类似的内容:

You can use something like this in your developer toolbar:

try {
    $("#a-select2-element").select2('isOpen');
    'select2 v4.x';
} catch(e) {
    'select2 v3.x';
} 

经过Select2 v3.5.3和v4.0.3的测试

Tested with Select2 v3.5.3 and v4.0.3

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