[bug] new added node not listen on events via `eles.on()`

Issue type

Bug report

Environment info

• Cytoscape.js version : v3.5.1
• Browser/Node.js & version :

Current (buggy) behaviour

After a new node is added to the graph, events on e.g. cy.nodes().on('click') are not executed, but are available via cy.on('click', 'node').

Desired behaviour

Listen on events after adding a new node to the graph via cy.nodes().on('click')

Minimum steps to reproduce

1. Click on a node:

// console output
cy.nodes().on(click)
cy.on(click, node)

1. Add new node via the button on top
2. Click on new node

// console output
cy.on(cxttap, node)

https://jsbin.com/ligesehera/edit?html,js,console,output

[sgratzl]

I think it is similar to JQuery on and the deprecated live. https://api.jquery.com/live/.

You are looking for that the .nodes() collection is always uptodate with the current nodes. However, as far I know it it is just a snapshot of the nodes at the moment you call .nodes().

[maxkfranz]

I’m not familiar with any tools that handle collections in an automatically updating way. How would that work with the set theory operations, or what if you wanted to diff an old set of nodes with a new set of nodes?

Where do you think would be the best place in the documentation to address your issue? Maybe eles.on()? Would you be open to writing a few sentences that would help to clarify things for people like you, who run into this issue?