How do I get the value of the x-axis in qqnorm plot

I'm trying to make a norm qqplot using plotly.js with the value obtained in R.

I can get the y-axis values.

m <- lm(Sepal.Length ~ Sepal.Width + Petal.Width, data=iris)
plot(m, which=2) #this plot is what I want to make using plotly
std.resi <- rstandard(m) # y-axis values

But, there's problem. I don't know how to get the x-axis values.

please advise me on this matter. thank you.