> ## Documentation Index
> Fetch the complete documentation index at: https://docs.js-confuser.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Object Extraction

> Extracts object properties into separate variables.

* Option name: `"objectExtraction"`

* Option values: `true/false/0-1/Function`

***

### Input / Output

This example showcases how `Object Extraction` transforms the code. Try it out by changing the input code and see changes apply in real-time.

```js title="Input.js" lines interactive-mode="obfuscate" theme={null}
// Input.js
var utils = {
  isString: (x) => typeof x === 'string',
  isBoolean: (x) => typeof x === 'boolean',
};
if (utils.isString('Hello')) {
  console.log('Correct type'); // "Correct type"
}

// Output.js
var et3UbC = (et3UbC) => {
  return typeof et3UbC === 'string';
};
if (et3UbC('Hello')) {
  console.log('Correct type');
}
```

***

### Custom Implementation

#### `options.objectExtraction(objectName)`

Control which objects are changed. Returns a `boolean`.

| Parameter    | Type     | Description                        |
| ------------ | -------- | ---------------------------------- |
| `objectName` | `string` | The object proposed to be changed. |

***

### Usage Example

The provided code example will obfuscate the file `input.js` and write the output to a file named `output.js`.

```js title="Usage Example" lines theme={null}
import JSConfuser from "js-confuser";
import {readFileSync, writeFileSync} from "fs";

// Read input code
const sourceCode = readFileSync("input.js", "utf8");
const options = {
  target: 'browser',
  objectExtraction: true,
  renameVariables: false,
};

JSConfuser.obfuscate(sourceCode, options).then((result)=>{
  // Write output code
  writeFileSync("output.js", result.code);
}).catch(err=>{
  // Error occurred
  console.error(err);  
});
```

***

#### Enabled In

* [High Preset](/presets/high): Yes
* [Medium Preset](/presets/medium): Yes
* [Low Preset](/presets/low): Yes