add plot method and test

Author: joshday

src/PlotlyLight.jl

@@ -122,7 +122,8 @@ mutable struct Plot
     end
 end
 Plot(; kw...) = Plot(Config(kw))
-(p::Plot)(; kw...) = (push!(p.data, Config(kw)); p)
+(p::Plot)(; kw...) = (push!(p.data, Config(kw)); return p)
+(p::Plot)(data::Config) = (push!(p.data, data); return p)
 
 StructTypes.StructType(::Plot) = StructTypes.Struct()
 
@@ -131,6 +132,10 @@ Base.display(::Cobweb.CobwebDisplay, o::Plot) = display(Cobweb.CobwebDisplay(),
 
 Base.show(io::IO, ::MIME"juliavscode/html", o::Plot) = show(io, MIME"text/html"(), o)
 
+function Base.show(io::IO, ::MIME"application/vnd.plotly.v1+json", p::Plot)
+    JSON3.write(io, Config(; data=p.data, layout=p.layout, config=p.config))
+end
+
 function write_plot_div(io::IO, o::Plot)
     class, style = Defaults.class, Defaults.style
     parent_class, parent_style = Defaults.parent_class, Defaults.parent_style

test/runtests.jl

@@ -7,6 +7,10 @@ using Test
     @test Plot(Config(x = 1:10)) isa Plot
     @test Plot(Config(x = 1:10), Config(title="Title")) isa Plot
     @test Plot(Config(x = 1:10), Config(title="Title"), Config(displaylogo=true)) isa Plot
+    p = Plot()
+    @test isempty(only(p.data))
+    p(Config(x=1:10,y=rand(10)))
+    @test length(p.data) == 2
 end
 #-----------------------------------------------------------------------------# src
 @testset "src" begin