Fluent style incompatible with typescript

[aicioara]

     var line = new Plottable.Plots.Line()
        .x(function(d) { return d.x; }, xScale)
        .y(function(d) { return d.y; }, yScale)
        .addDataset(new Plottable.Dataset(data))
        .autorangeMode("y")

error TS2339: Property 'autorangeMode' does not exist on type 'Plot'.

Issue: .addDataset returns this, but it is invoked on the Plottable.Plot, hence it returns a Plottable.Plot, instead of a Plottable.Plots.Line

There is a duplicate of this somewhere, if you find it, please close that one as duplicate, since it did not have an easy example / was outdated as far as I remember

[bluong]

Related microsoft/TypeScript#275

[aicioara]

And #2119 from our end

[aicioara]

Will close the older one for the sake of bumping and copying all information over here

[aicioara]

Related typescript

Currently blocking on the following TypeScript issues

• Return type of inherited methods breaks function chaining microsoft/TypeScript#275
• Allow type system to represent this in function inputs/outputs microsoft/TypeScript#285

@rcchen said

Still valid; the easiest repro for this is chaining a method for a parent class on a subclass.
Example: new Plottable.Plots.Rectangle().x().x2()..
If .x() were not explicitly defined on Plots.Rectangle, .x2() would not work.
This is an open issue on Typescript as has been referenced above.

[jtlan]

New ticket at microsoft/TypeScript#3694

[ronanquillevere]

+1

[hellochar]

Typescript 2.0 has fixed this such that fluent style now preserves the polymorphic type in most cases; @ronanquillevere is there a specific instance where you're hitting this still in ts 2.0?

[ronanquillevere]

On 2.0.7 was not working with inheritance. Still returning the parent abstract type.