bun.sh/docs/guides/read-file/json.md

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Read a JSON file

The Bun.file() function accepts a path and returns a BunFile instance. The BunFile class extends Blob and allows you to lazily read the file in a variety of formats. Use .json() to read and parse the contents of a .json file as a plain object.

const path = "/path/to/package.json";
const file = Bun.file(path);

const contents = await file.json();
// { name: "my-package" }

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The MIME type of the BunFile will be set accordingly.

const path = "/path/to/package.json";
const file = Bun.file(path);

file.type; // => "application/json;charset=utf-8";

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If the path to the .json file is static, it can be directly imported as a module.

import pkg from "./package.json";

pkg.name; // => "my-package"