Excellent!
Thank you.
Just use the placeholder attribute on the html element like so:
1
let pwField = Controls.Input pwStream -< [ PlaceHolder "password" ]
Controls.Input returns an Element so you can add attributes and child elements just like you would with plain HTML combinators.
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The field I just typed the title of this question into said Title in grey text as a prompt to tell me what I should enter in there. Likewise the field below where I can enter tags said Tags (comma separated, without "websharper"). This is the modern way to explain the purpose of text fields, rather than the old way of having a label next to each field.
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Controls.Inputfield for the username and aControls.Passwordfield (which shows blobs for characters) for the password. I want these fields to say Username and Password in grey text until the user starts typing into them, and again if the user deletes all the text in the field.