Flow: new.target support

[bradleat]

Flow breaks if you give it:

var x = new.target

It tells me that the "." is an unexpected token.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/new.target

[mroch]

TIL. added it to #560 too.

[rogchap]

Even get this error even with option: suppress_comment (flow v0.23.0) eg.

// $FlowIssue: https://github.com/facebook/flow/issues/1152
if (new.target === BaseClass) {
  throw TypeError("new of abstract class BaseClass");
}

[jlouazel]

Is there any update on this one? I am like @rogchap, suppress_comment seems not to work with it.

[Ltrlg]

The following is a parse error 0.38.0:

function a(x = new.target){}

I found no evidence it should be forbidden and both Firefox and Node read it without error.

[Sigfried]

I'm still getting this problem:

./node_modules/flow-bin/flow-osx-v0.40.0/flow check
src/components/SigmaReactGraph.js:40
 40:     if (new.target === MacroNode) {
             ^^^^^^^^^^ not (sup)ported

[ThomasGHenry]

I'm still getting this problem:

./node_modules/flow-bin/flow-osx-v0.40.0/flow check
src/components/SigmaReactGraph.js:40
 40:     if (new.target === MacroNode) {
             ^^^^^^^^^^ not (sup)ported

Same. What's the recommended way to do this?