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# `dependency-tree-esm`
Returns an unordered array of local paths to dependencies of a Node ES module JavaScript file.
* See also: [`dependency-tree`](https://github.com/11ty/eleventy-dependency-tree) for the CommonJS version.
This is used by Eleventy to find dependencies of a JavaScript file to watch for changes to re-run Eleventy’s build.
## Installation
```
npm install --save-dev @11ty/dependency-tree-esm
```
## Features
* Ignores bare specifiers (e.g. `import "my-package"`)
* Ignores Node’s built-ins (e.g. `import "path"`)
* Handles circular dependencies
* Returns an empty set if the file does not exist.
## Usage
```js
// my-file.js
// if my-local-dependency.js has dependencies, it will include those too
import "./my-local-dependency.js";
// ignored, is a built-in
import path from "path";
```
```js
const { find } = require("@11ty/dependency-tree-esm");
await find("./my-file.js");
// returns ["./my-local-dependency.js"]
```
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