Github user mcgilman commented on the issue: https://github.com/apache/nifi/pull/1546 Hey @scottyaslan, This is a great start, but I think there are a few fundamental issues with how `PropertyDescriptors` relay what sort of editor should be used. There does not appear to be a cross-browser support for masking `textareas` (multi-line input). There exists sensitive properties that currently expect the field to support multi-line input. The `input[type=password]` only supports a single line. I think we would need to introduce a new attribute of `PropetyDescriptor` which would drive whether or not to use a masked single line input or the existing multi-line `textarea`. The existing multi-line `textareas` support sensitive by not returning/showing the value once set. We would not be able to support a `PropertyDescriptor` that requires masking and multi-line input. Additional complications exist for sensitive properties that support expression language. We'd have to spend some time to determine if `CodeMirror` supports masking or if it's possible to introduce that sort of capability. If not, we would not be able to support a `PropertyDescriptor` that requires masking and supports expression language.
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