René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"In a multi-trace figure the traces that are not animated get invisible when animation starts","articleBody":"Recently I noticed that the old definition of animation frames doesn't work anymore.\r\nMore precisely: if I define a subplot with two cells, for example, and want to animate only the traces in a single subplot, then by the initial definition from 2016, I had to set the attribute `Frame.traces` on the list of trace indices in `fig.data` that are modified from frame to frame. All other traces were visible during the animation.\r\n\r\nAfter a recent plotly.js release (I couldn't identify it) the   traces that are not modified within  `Frame.data` disappear when the animation starts, and I have to extend   the list `Frame.traces` to the list of all traces in `fig.data` because those that are not modified from frame to frame are   set invisible by plotly.js. Hence `Frame.data` must contain the update `visible=True` for these  ones.\r\n\r\nMy question is: is it possible to revert the Frame definition to the old one? Why let users make these settings  (`visible=True`), and why they are not performed  automatically by plotly.js, as it did\r\nfor three years?\r\n\r\nHere is a  simple  example to understand better what I'm referring to:\r\n[https://plot.ly/~empet/15543/](https://plot.ly/~empet/15543/)\r\n","author":{"url":"https://github.com/empet","@type":"Person","name":"empet"},"datePublished":"2020-02-21T09:45:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/4596/plotly.js/issues/4596"}