typeof operator isn't documented about typescript-handbook HOT 6 OPEN

ah, apparently I fell prey to that "novice puzzlement" you mentioned :P Thank you for the clarification!

from typescript-handbook.

I came here because I couldn't find documentation for the switch statement in the handbook. It seems like there is a missing page for "expressions" that could cover typeof, switch and others.

from typescript-handbook.

@dwarburt AFAIK switch in Typescript is unmodified from Javascript. Is there something Typescript-specific you were looking for? The handbook doesn't cover most of vanilla Javascript, for obvious reasons. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch.

from typescript-handbook.

I was trying to find out if it's possible to switch on the type of a variable. It's not obvious to me that the handbook shouldn't cover all the parts of the language. It certainly covers a lot of vanilla JavaScript already.

At least it would be nice if it said somewhere that this particular language construct is unmodified.

from typescript-handbook.

The typeof operator, as used in type queries rather than Javascript, isn't documented

Like @estaub mentioned of switch, typeof is also a native JS operator: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof

from typescript-handbook.

@jpelton-stroud Sorry, but I'm not sure what your point was. If you were saying that the MDN doc covers use of typeof in TS as a type query operator, you'd be wrong; static typing is a foreign concept to JS that can't even begin to be discussed in JS terms. I suppose I should provide an example, to be crystal clear:

    const JoeSchmoe = { name: 'Schmoe, Joe', district: '42' }
    type legislator = typeof JoeSchmoe  // == { name: string; district: string }

from typescript-handbook.