Jonas Jenwald 89f6bb0fc6 Ensure that the viewer property, on BaseViewer-instances, is a valid div-element (issue 12320)
This should help prevent future issues, caused by the user omitting the `viewer` option and/or providing an incorrect `container` option, when initializing a `BaseViewer`-instance.
2020-09-03 15:06:36 +02:00
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2020-04-14 12:28:14 +02:00
2020-04-14 12:28:14 +02:00
2020-04-14 12:28:14 +02:00