The **`querystring.escape()`** method in Node.js performs #key# URL: Uniform Resource Locator #key# percent-encoding on a given string. The `querystring.escape` method iterates over a string and places the `%` encoding to convert the given string into a URL query.

The process is illustrated below:

> Note: The `querystring.escape()` method is rarely used directly. Instead, it is used implicitly by the `querystring.stringify()` method. You can read up on the other `querystring` methods in the [official documentation](https://nodejs.org/api/querystring.html).

The `querystring.escape()` method encodes all characters except the following:

> A-Z a-z 0-9 - _ . ! ~ * ' ( )

To use the `querystring.escape()` method, you will need to import the `querystring` module into the program, as shown below:

```Javascript
const querystring = require("querystring")
``` 

<h2>Parameters</h2>

The `querystring.escape()` method takes a single mandatory parameter that represents the string to be encoded.

<h2>Return value</h2>

The `querystring.escape()` method returns the percent-encoded query string formed from the provided parameter.

<h2>Example</h2>

The code below shows how the `querystring.escape()` method works in Node.js:

const querystring = require("querystring")

// initializing string
let normal_string = "query strings with educative = fun learning?"

// performing encoding
let encoded_string = querystring.escape(normal_string)

// output results
console.log("Original string: ", normal_string)
console.log("Encoded query string: ", encoded_string)

<h2>Explanation</h2>

First, the code initializes a string object `normal_string`. The `querystring.escape()` method in line $7$ proceeds to add the percentage encoding characters, e.g., `%20`, `%3D`, and `%3F%`, in place of white spaces, the `=` operator, and the `?` symbol, respectively. As a result, the encoded URL query string is created.

> Note: You can find a comprehensive list of characters and their corresponding encodings [here](https://www.charset.org/utf-8).

What is the querystring.escape() method in Node.js?

Parameters

Return value

Example

Explanation