René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Don't mutate contours start/end/size into user traces","articleBody":"Demo: https://codepen.io/mafar/pen/NWKOxzr?editors=0010\r\nThis pen is bare minimum for bug reproduction\r\n\r\n**Explaination:** https://plot.ly/javascript/reference/#contour\r\nConsider a user is given 3 inputs where he has to set \r\n\r\n1. [contours-start](https://plot.ly/javascript/reference/#contour-contours-start)\r\n1. [contours-end](https://plot.ly/javascript/reference/#contour-contours-end)\r\n1. [contours-size](https://plot.ly/javascript/reference/#contour-contours-size)\r\n\r\nand he types invalid option and plotly breaks\r\n\r\n**Required:**\r\nInstead of breaking, plotly must ignore values or throw warning\r\n\r\n**Image:** wait to load\r\n![image](https://user-images.githubusercontent.com/4101480/65134779-b7f56280-d9b9-11e9-83c3-446630b87637.png)\r\n","author":{"url":"https://github.com/mafar","@type":"Person","name":"mafar"},"datePublished":"2019-09-18T09:17:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/4199/plotly.js/issues/4199"}