The missing fs.promises.exists(). Also supports case-sensitive/insensitive file paths.

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• The fs Promises API doesn't have an exists() method that replaces existsSync().

• Depending on how the file-system is configured, file paths can be case-sensitive or insensitive. This module lets you specify case regardless of the file-system configuration.

npm i fs.promises.exists

import fsExists from 'fs.promises.exists'

await fsExists('./file-that-exists')
// => true

await fsExists('./file-that-doesnt-exist')
// => false

import fsExists from 'fs.promises.exists'

await fsExists('./CASE-SENSITIVE-FILE-PATH', true)
// => true

await fsExists('./case-sensitive-file-path', true)
// => false

import fsExists from 'fs.promises.exists'

await fsExists('./CASE-SENSITIVE-FILE-PATH', false)
// => ./CASE-SENSITIVE-FILE-PATH ← Retruns truthy case-preserved match

await fsExists('./case-sensitive-file-path', false)
// => ./CASE-SENSITIVE-FILE-PATH ← Retruns truthy case-preserved match

Returns: boolean | string

Type: string

Required

Path to the file to check the existence of.

Type: boolean

Optional

Whether to check the existence of the path case-sensitively or not.

• true - Enforce case sensitive path checking.

• false - Enforce case insensitive path checking. On match, it returns the case senstive path as a string.

• undefined - Default behavior is based on the disk formatting of the environment. Specifically, this is the HFS+ file system personality.

  Most default setups (such as macOS) defaults to being case insensitive. That means checking whether ./does-file-exist and ./DoEs-FiLe-ExIsT are equivalent.