Add conditional tooltip support (md-visible for md-tooltip)

[pdavin-zz]

Bug, feature request, or proposal:

Can we have conditional tooltip support like in AngularJs? By conditional tooltip I mean the tooltip only displays if a certain condition is true. The element the tooltip is on should always be displayed - so the element the tooltip is attached to is not conditional. This is behavior offered by md-visible with Angular 1's md-tooltip I believe: https://material.angularjs.org/latest/api/directive/mdTooltip

What is the expected behavior?

https://material.angularjs.org/latest/api/directive/mdTooltip

What is the current behavior?

https://material.angular.io/components/component/tooltip

What is the use-case or motivation for changing an existing behavior?

Allows writing conditional tooltips, without duplicating DOM structure (creating two copies of the potentially-tooltip'd text or element).

[andrewseguin]

Good news, this has been added recently and will be included in the next release

#3578

[pdavin-zz]

Great! Sorry for the dupe - I did search open/closed issues before submitting and didn't find anything, but I think that's because I didn't expect it to be phrased as disabled.

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