> ## 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.

# Identifier Generator

> Determines how variables are renamed.

* Option name: `"identifierGenerator"`

* Option values: `"hexadecimal"/"randomized"/"zeroWidth"/"mangled"/"number"/Function`

***

#### Modes

| Mode            | Description                   | Example        |
| --------------- | ----------------------------- | -------------- |
| `"hexadecimal"` | Random hex strings            | \_0xa8db5      |
| `"randomized"`  | Random characters             | w\$Tsu4G       |
| `"zeroWidth"`   | Invisible characters          | U+200D         |
| `"mangled"`     | Alphabet sequence             | a, b, c        |
| `"number"`      | Numbered sequence             | var\_1, var\_2 |
| `<function>`    | Write a custom name generator | See Below      |

***

### Custom Implementation

#### `options.identifierGenerator()`

Customize the new variables name of the program. Returns a `string`.

```js title="Options.js" lines theme={null}
module.exports = {
  target: "node",

  // Custom variable names
  identifierGenerator: function () {
    return "$" + Math.random().toString(36).substring(7);
  },
  renameVariables: true,
};
```

***

### 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',
  identifierGenerator: true,
};

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

***

#### See Also

* [Rename Variables](./renameVariables)