isImported function

bool isImported(
  1. String url
)

Checks if a library is present in the page. Throws an UnsupportedError if the dart:html library is not present.

This happens by checking the src field of all script tags in the html page.

Implementation

bool isImported(String url) => throw new UnsupportedError(
    'Injecting js is only possible if the platform supports dart:hmtl!');