**`Zlib`** is a built-in module in Node.js that provides compression or decompression properties on texts and buffers in a program.

We use the **`zlib.deflateRawSync()` module** to compress a buffer or a string with Deflate. The `DeflateRawSync()`  module was introduced in version v0.11.12 of Node.js.

# Syntax

We can implement the `deflateRawSync()` module in a program using the following syntax:

``` node.js
zlib.deflateRawSync(buffer, options);
```
The `deflateRawSync()` module accepts two arguments as parameters:

- **`buffer`**: We use buffers to represent a fixed-length sequence of bytes. In the `deflateRawSync()` module, we can include buffers of `<TypedArray>`, `<DataView>`, `<ArrayBuffer>`, and `<string>` type.

- **`options`**: These are optional objects that we can include in `deflateRawSync()` as a parameter.

The function returns the compressed data.

# Code

Let's observe the following implementation to understand how to include a `createDeflateRaw()` method into a program code.

const zlib = require('zlib');

var text1 = "Hello this is a string";
var def_raw_sync = zlib.deflateRawSync(text1);

console.log(def_raw_sync);

# Explanation

Above is an elementary example of using the `deflateRawSync()` module to deflate a string named `text1` and display it on the console log.

How to use 'zlib.deflateRawSync()' in Node.js

Compress Node.js buffers or strings using zlib.deflateRawSync() with specified buffer and optional options.