René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Ability to suppress warnings by type (or just experimental warnings)","articleBody":"**Is your feature request related to a problem? Please describe.**\r\nI'd like to suppress experimental warnings while still seeing any other errors.  In particular when I am using native ES modules I do not want the experimental warning printed for every process, but I do want unrelated warnings to still be printed.\r\n\r\n**Describe the solution you'd like**\r\nAllow `--no-warnings` to optionally accept an option string such as `--no-warnings=type1,type2`.  Using `--no-warnings` without any option would continue to disable all warnings.  This would allow `--no-warnings=ExperimentalWarning` to suppress ExperimentalWarning only.\r\n\r\n**Describe alternatives you've considered**\r\n`--no-experimental-warnings` or a similarly named new flag could be created.  This has the drawback that `node --no-experimental-warnings` on node.js 13.3.0 exit with an error where `--no-warnings=ExperimentalWarnings` will not currently error (it causes all warnings to be ignored).\r\n\r\nIn my own repo which uses ES modules I've created `suppress-experimental.cjs` which gets loaded with `NODE_OPTIONS='--require=./suppress-experimental.cjs'`:\r\n```js\r\n'use strict';\r\n\r\nconst {emitWarning} = process;\r\n\r\nprocess.emitWarning = (warning, ...args) =\u003e {\r\n\tif (args[0] === 'ExperimentalWarning') {\r\n\t\treturn;\r\n\t}\r\n\r\n\tif (args[0] \u0026\u0026 typeof args[0] === 'object' \u0026\u0026 args[0].type === 'ExperimentalWarning') {\r\n\t\treturn;\r\n\t}\r\n\r\n\treturn emitWarning(warning, ...args);\r\n};\r\n```\r\n\r\nObviously patching node.js internals like this is undesirable but it accomplishes my goal.","author":{"url":"https://github.com/coreyfarrell","@type":"Person","name":"coreyfarrell"},"datePublished":"2019-12-05T18:00:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":36},"url":"https://github.com/30810/node/issues/30810"}