Node.js Query String

Node.js Query String

The Node.js Query String module provides helpful methods for working with query strings in URLs. It allows developers to easily convert a query string into a JSON object and vice versa, making data handling between client and server much smoother.

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To use the query string module in Node.js, you first need to import it using:

require('querystring');

Node.js Query String Methods

The Query String utility in Node.js offers four main methods. Among them, the two most commonly used are listed below:

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Example 1: Using parse()

Let’s take a simple example of how to use the parse() method to convert a query string into a JSON object.

File: query-string-example1.js

querystring = require('querystring');  
const obj1 = querystring.parse('name=sonoo&company=updategadh');  
console.log(obj1);

Output:

{ name: 'sonoo', company: 'updategadh' }

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This method breaks the query string into key-value pairs and represents them as a JSON object.

Example 2: Using stringify()

Now, let’s see how the stringify() method works. It converts a JSON object into a query string.

File: query-string-example2.js

querystring = require('querystring');  
const qs1 = querystring.stringify({ name: 'sonoo', company: 'updategadh' });  
console.log(qs1);

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Output:

name=sonoo&company=updategadh

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The stringify() method is especially useful when sending data as a query string in URLs or making API requests.

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