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How to use the vega-scenegraph.Handler.prototype function in vega-scenegraph

To help you get started, we’ve selected a few vega-scenegraph examples, based on popular ways it is used in public projects.

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vega / vega-view / src / View.js View on Github

prototype.tooltipHandler = function(_) {
  var h = this._handler;
  if (!arguments.length) {
    return h.handleTooltip;
  } else {
    h.handleTooltip = _ || Handler.prototype.handleTooltip;
    return this;
  }
};