Specifying a no-effect zoom animation causes an error

[aryoxp]

Issue type

Bug report

Environment info

• Cytoscape.js version : 3.13.0
• Browser/Node.js & version : Google Chrome 79

Current (buggy) behaviour

Animating elements using a zoom configuration object to which the graph will be animated causes cytoscape JS to error, using the following script:

cy.animate({
   'zoom': {
     level: 1.0
    }
});

On the browser console, the error is something like:

Uncaught TypeError: Failed to construct 'OffscreenCanvas': Value is not of type 'unsigned long'.
at m.el.makeOffscreenCanvas (cytoscape.min.js:23)
at ys.ms.addTexture (cytoscape.min.js:23)
at y (cytoscape.min.js:23)
at ys.ms.getElement (cytoscape.min.js:23)
at m.drawCachedElementPortion (cytoscape.min.js:23)
at m.Bs.drawCachedElement (cytoscape.min.js:23)
at m.Bs.drawCachedElements (cytoscape.min.js:23)
at m.Bs.drawLayeredElements (cytoscape.min.js:23)
at m.qs.render (cytoscape.min.js:23)
at n (cytoscape.min.js:23)`

However, it is working properly when I animate using:

cy.animate({
   'zoom': 1.0
});

no matter how many times I execute the animate function.

Desired behaviour

Whether using any of those parameters, both animation should behave the same.
Actually, what I need to accomplish is to animate camera zoom to a particular node position, however, when I animate using a zoom configuration object, Cytoscape JS raises an error, hence the script immediately stop.

Minimum steps to reproduce

Run the following fork:
https://jsbin.com/qocuzim/1/edit?html,css,js,console,output

Clicking Button 1 everytime should not raises any error
Clicking Button 2 after the first zoom animation is completed will raise error.