René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"reversescale doesn't reverse colorbar on contour plot with coloring='heatmap'","articleBody":"### Bug\r\n\r\n`reversescale: True` doesn't reverse the colorbar on a contour plot with `{contours: {coloring: 'heatmap'}}`.\r\n\r\nIn the plot below, the colorbar indicates the red region has larger values, but it actually has smaller values.\r\n\r\n![plotly-issue](https://user-images.githubusercontent.com/17039389/71063572-498a9100-21b0-11ea-9f96-b4fffa88227a.gif)\r\n\r\n### Code\r\n\r\n```javascript\r\nvar data = [{\r\n  z: [[10, 10.625, 12.5, 15.625, 20],\r\n      [5.625, 6.25, 8.125, 11.25, 15.625],\r\n      [2.5, 3.125, 5., 8.125, 12.5],\r\n      [0.625, 1.25, 3.125, 6.25, 10.625],\r\n      [0, 0.625, 2.5, 5.625, 10]],\r\n  x: [-9, -6, -5 , -3, -1],\r\n  y: [0, 1, 4, 5, 7],\r\n  type: 'contour',\r\n  contours: {\r\n    coloring: 'heatmap'\r\n  },\r\n  reversescale: true,\r\n}];\r\n\r\nvar layout = {\r\n  title: 'Setting the X and Y Coordinates in a Contour Plot'\r\n};\r\n\r\nPlotly.newPlot('myDiv', data, layout);\r\n```\r\n \r\n### Codepen\r\nhttps://codepen.io/harupy/pen/bGNgBOz","author":{"url":"https://github.com/harupy","@type":"Person","name":"harupy"},"datePublished":"2019-12-18T07:20:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/4430/plotly.js/issues/4430"}