如何使用 Selenium 和 Javascript 执行器查询 Canvas？

Question

I like to know if its possible to automate this 'graph' which is created on the canvas, if yes, how to automate it. I have to interact with all the elements on the 'graph or a map like thing' by clicking on an element and dragging the elements and performing other actions like getting the text, etc. Is this possible in automation using selenium with JavaScript executor, can anyone help. i already scour the internet, but didn't find anything useful or which even remotely answer the question i have. if any one can help, please do write an answer. i cannot share the real picture due to security reasons, but this is almost the same not identical.

Answer 1

https://www.protractortest.org/#/api?view=ElementArrayFinder.prototype.evaluate

this is what you need. But you need to know variable names (internal logic of the canvas) in order to retrieve data