How to use core-shared-lib to check if a URL exists?

Question

Because of the CORS issue, I cannot use core-ajax.

It was suggested to use polymer-jsonp, which has been deprecated and core-shared-lib is the alternative. But core-shared-lib seems nothing like polymer-jsonp, and the document is not helping a lot.

So how to use this element exactly?

Answer 1

如果您尝试跨域请求JSON数据且该服务支持JSONP，您可以使用byutv-jsonp。

  

byutv-jsonp element（）公开了网络请求功能。它是一个Polymer v1.0 +元素，有助于发出JSONP请求。它使用Polymer行为（Byutv.behaviors.Jsonp）。它是在Polymer的铁 - ajax元素（）之后形成图案的。它已使用单元测试进行测试。它是BYUtv Elements元素组的一部分。