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Unable to get graph to update

Hi
I am trying to get a basic plotly.js graph to update using the “update” method, but the graph simply empties itself. As far as I can tell I am sending the correct parameters, but the help I can find online is mainly for the Python version and I’m stuck. I’d be grateful if someone can point out what I’m doing wrong here?

<html>
   <head>
      <script src="https://code.jquery.com/jquery-1.9.1.js"></script>
      <script src="https://d3js.org/d3.v6.min.js"></script>
      <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
      
      <div>
         <div id="PlotlyTest"></div>
      </div>
      <script type="text/javascript">

var data = [{
    x: ['UK','Spain'],
    y: [1,2],
    type: 'bar'
}];
var layout = {
    updatemenus: [{
        y: 0.8,
        yanchor: 'top',
        buttons: [{
            method: 'update',
            args: [{'x':['USA'],'y':[2],'marker.color': 'red'}, {'title': 'some new title'}],
            label: 'red'
        }]
    }]

};




Plotly.newPlot('PlotlyTest', data, layout);


      </script>
      
   </body>
</html>