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Conditionally Add Text to bubble chart

Is there a way to hide or disable hover based on value? Like hide hover/annotations when activated point value is less than 1.5?

Plotly doesn’t expose attributes to filter per-point graph features. You’ll have to build a custom text array yourself. Something like:

var y = [/* your y data */]
var text = => v > 1.5 ? String(v) : '')

Plotly.newPlot('graph', [{
  mode: 'markers+text',
  y: y,
  text: text

should be close to your desired behavior.