Which @angular/* package(s) are the source of the bug?

compiler

Is this a regression?

No

Description

with this code, Angular will treat the button as disabled(xxxx is any random string)

<button :disabled="xxxx">Disabled Button</button>

First, is there any document that Angular support this code style begin with colon(:) for property binding ?
If not, I think it is better to throw error

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

No response

Anything else?

No response