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Quickstart

Scan a directory for files matching *.ts: 
import { Glob } from "bun";

const glob = new Glob("**/*.ts");

// Scans the current working directory and each of its sub-directories recursively
for await (const file of glob.scan(".")) {
  console.log(file); // => "index.ts"
}
Match a string against a glob pattern: 
import { Glob } from "bun";

const glob = new Glob("*.ts");

glob.match("index.ts"); // => true
glob.match("index.js"); // => false
The Glob class implements the following interface: 
class Glob {
  scan(root: string | ScanOptions): AsyncIterable<string>;
  scanSync(root: string | ScanOptions): Iterable<string>;

  match(path: string): boolean;
}

interface ScanOptions {
  /**
   * The root directory to start matching from. Defaults to `process.cwd()`
   */
  cwd?: string;

  /**
   * Allow patterns to match entries that begin with a period (`.`).
   *
   * @default false
   */
  dot?: boolean;

  /**
   * Return the absolute path for entries.
   *
   * @default false
   */
  absolute?: boolean;

  /**
   * Indicates whether to traverse descendants of symbolic link directories.
   *
   * @default false
   */
  followSymlinks?: boolean;

  /**
   * Throw an error when symbolic link is broken
   *
   * @default false
   */
  throwErrorOnBrokenSymlink?: boolean;

  /**
   * Return only files.
   *
   * @default true
   */
  onlyFiles?: boolean;
}

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Supported Glob Patterns

Bun supports the following glob patterns:

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? - Match any single character

const glob = new Glob("???.ts");
glob.match("foo.ts"); // => true
glob.match("foobar.ts"); // => false

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* - Matches zero or more characters, except for path separators (/ or \)

const glob = new Glob("*.ts");
glob.match("index.ts"); // => true
glob.match("src/index.ts"); // => false

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** - Match any number of characters including /

const glob = new Glob("**/*.ts");
glob.match("index.ts"); // => true
glob.match("src/index.ts"); // => true
glob.match("src/index.js"); // => false

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[ab] - Matches one of the characters contained in the brackets, as well as character ranges

const glob = new Glob("ba[rz].ts");
glob.match("bar.ts"); // => true
glob.match("baz.ts"); // => true
glob.match("bat.ts"); // => false
You can use character ranges (for example [0-9], [a-z]) and the negation operators ^ or ! to match anything except the characters in the brackets (for example [^ab], [!a-z]). 
const glob = new Glob("ba[a-z][0-9][^4-9].ts");
glob.match("bar01.ts"); // => true
glob.match("baz83.ts"); // => true
glob.match("bat22.ts"); // => true
glob.match("bat24.ts"); // => false
glob.match("ba0a8.ts"); // => false

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{a,b,c} - Match any of the given patterns

const glob = new Glob("{a,b,c}.ts");
glob.match("a.ts"); // => true
glob.match("b.ts"); // => true
glob.match("c.ts"); // => true
glob.match("d.ts"); // => false
These patterns can be nested up to 10 levels deep and contain any of the earlier wildcards.

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! - Negates the result at the start of a pattern

const glob = new Glob("!index.ts");
glob.match("index.ts"); // => false
glob.match("foo.ts"); // => true

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\ - Escapes any of the special characters above

const glob = new Glob("\\!index.ts");
glob.match("!index.ts"); // => true
glob.match("index.ts"); // => false

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Node.js fs.glob() compatibility

Bun also implements Node.js’s fs.glob() functions with additional features: 
import { glob, globSync, promises } from "node:fs";

// Array of patterns
const files = await promises.glob(["**/*.ts", "**/*.js"]);

// Exclude patterns
const filtered = await promises.glob("**/*", {
  exclude: ["node_modules/**", "*.test.*"],
});
All three functions (fs.glob(), fs.globSync(), fs.promises.glob()) support:
  • Array of patterns as the first argument
  • exclude option to filter results