I'm using ng-file-upload plugin to upload files and I'd like to select files with specific extension. In my case it's .info.system.yaml extension. I've looked through examples and see only short variants like .pdf, .docs and etc.
Based on the documentation I've tried ngf-pattern="'.info.system.yaml'" and ngf-accept=".info.system.yaml" but it doesn't work.
<button class="btn btn-default"
ngf-select="selectFiles($files, $invalidFiles)"
ngf-pattern="'.info.system.yaml'"
ngf-accept=".info.system.yaml"
multiple>Select File</button>