Why does setting the color limits in julia not change my heatmap?

Plotly R, MATLAB, Julia, Net Plotly R
1

Hi,

I cannot manage to change the color limits of my plotly heatmap in julia.
I have tried the following options, but none seem to work:

using PlotlyJS

function makePlot1()
n = 40
m = 50
data = rand(n, m)
display(plot(heatmap(
x = 1:m,
y = 1:n,
z = data,
cmax = 0.5)
, Layout()))
end

function makePlot2()
n = 40
m = 50
data = rand(n, m)
display(plot(heatmap(
x = 1:m,
y = 1:n,
z = data,
coloraxis = attr(
cmax = 0.5
))
, Layout()))
end

function makePlot3()
n = 40
m = 50
data = rand(n, m)
display(plot(heatmap(
x = 1:m,
y = 1:n,
z = data)
, Layout(cmax = 0.5)))
end

function makePlot4()
n = 40
m = 50
data = rand(n, m)
display(plot(heatmap(
x = 1:m,
y = 1:n,
z = data)
, Layout(coloraxis = attr(cmax = 0.5))))
end

makePlot1()
makePlot2()
makePlot3()
makePlot4()

I found the cmax keyword on Layout.coloraxis in Julia. I tried changing reversescale to true to see whether the keys are at the right place. The following call to reversescale seems to work:

using PlotlyJS

function makePlot1()
n = 40
m = 50
data = zeros(n, m)
for i in 1:n
for j in 1:m
data[i, j] = i * j
end
end
display(plot(heatmap(
x = 1:m,
y = 1:n,
z = data,
cmax = m,
reversescale = true)
, Layout()))
end

makePlot1()

However, the colorlimits still do not change.
What am I doing wrong? How should I set my color limits? Is there a bug or is the documentation simply not correct?
I am at a loss here.