Why is the graph not being drawn in Canvas inside a React component?

Question

Canvas

Problem: when I call the function for drawing a graph on the canvas from willRecieveProps, the graph is drawn, but when from componentDidMount, then no.
I have already checked all stages of rendering (there is data for rendering), set a delay in didMount before execution.
Everything seems to be done.
I call the same function.
But there is no graph when I zoom in, or a drag graph appears.
What could be the problem?

Answer 1

zoom/drag - most likely trigger props changes, and the graph is drawn.
Make a minimal example with a call to this function and a canvas without everything else. On pure create-react-app, for example. Perhaps, if it already works for you, then you will understand what is on the list of "differences" and slowly adding / removing - find out.
If not, you will have an example that you upload to github and we will help.
It's hard to think of what could be wrong without looking at the code. Obviously, either the canvas element somehow didn’t draw when you tried to put something there, or the link simply looks not at the current canvas, but somewhere else, since you say that everything is in order with the data.
Plus, maybe some kind of bug, try a force update (a dirty option, but since there is still no repository with an example ...)