Function getQsValue

getQsValue(param, queryString?): string | undefined
Retrieves the value of a URL query string parameter.
Parameters
- param: string
  
  The query string parameter to retrieve.
- queryString: string = window.location.href
  
  The query string to search in (default is window.location).
Returns string | undefined
Example
```
ix.api.url.getQsValue("qs_link", window.location.href);
```