René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"vfs: recursive mkdir does not follow symlinked intermediate directories","articleBody":"### Version\n\nmain\n\n### Platform\n\n```text\nmacOS 26.5.0\n```\n\n### Subsystem\n\nvfs\n\n### What steps will reproduce the bug?\n\n```js\nimport vfs from 'node:vfs';\n\nconst fs = vfs.create({ emitExperimentalWarning: false });\n\nfs.mkdirSync('/target');\nfs.symlinkSync('/target', '/link');\n\ntry {\n  fs.mkdirSync('/link/subdir', { recursive: true });\n  console.log('/target/subdir exists:', fs.existsSync('/target/subdir'));\n} catch (err) {\n  console.log('threw:', err.code);\n}\n```\n\n### How often does it reproduce? Is there a required condition?\n\nAlways\n\n### What is the expected behavior? Why is that the expected behavior?\n\n```console\n/target/subdir exists: true\n```\n\nNative recursive `mkdir` follows symlinked intermediate path components, so creating through `/link/subdir` should create `subdir` inside `/target`.\n\n### What do you see instead?\n\nthrows `ENOTDIR`\n\nThe recursive mkdir loop checks the symlink entry itself with `entry.isDirectory()` instead of resolving the intermediate symlink to its directory target.\n\n\n### Additional information\n\nfs equivalent\n\n```js\nimport fs from 'node:fs';\nimport os from 'node:os';\nimport path from 'node:path';\n\nconst dir = fs.mkdtempSync(path.join(os.tmpdir(), 'mkdir-symlink-'));\n\nconst target = path.join(dir, 'target');\nconst link = path.join(dir, 'link');\n\nfs.mkdirSync(target);\nfs.symlinkSync(target, link);\n\ntry {\n  fs.mkdirSync(path.join(link, 'subdir'), { recursive: true });\n  console.log('target/subdir exists:', fs.existsSync(path.join(target, 'subdir')));\n} catch (err) {\n  console.log('threw:', err.code);\n}\n```\n\nOutput\n```console\ntarget/subdir exists: true\n```","author":{"url":"https://github.com/trivikr","@type":"Person","name":"trivikr"},"datePublished":"2026-07-04T14:18:19.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/64286/node/issues/64286"}