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HTML 

              
                <head>
	<!-- Load plotly.js into the DOM -->
	<script src='https://cdn.plot.ly/plotly-latest.min.js'></script>
</head>

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	<div id='myDiv'><!-- Plotly chart will be drawn inside this DIV --></div>
</body>
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CSS
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JS 

              
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 var layout = {"height":550,"width":600,"title":{"text":"XY.Histogram2dContour.WithDensity"},"showlegend":false,"autosize":false,"xaxis":{"showgrid":false,"zeroline":false,"showline":false,"domain":[0,0.85]},"yaxis":{"showgrid":false,"zeroline":false,"showline":false,"domain":[0,0.85]},"xaxis2":{"showgrid":false,"zeroline":false,"showline":false,"domain":[0.85,1]},"yaxis2":{"showgrid":false,"zeroline":false,"showline":false,"domain":[0.85,1]}};
 var config = {"responsive":true,"scrollZoom":true,"displaylogo":false};
 Plotly.newPlot("myDiv", traces, layout, config);

console.log(Plotly.validate(traces, layout))
!
999px

Console