How to use fast-json-stringify Library In JSON
In this approach, we are using the fast-json-stringify library to efficiently generate a JSON stringify function with a predefined schema based on the key-value pairs of a Map. The schema is dynamically generated using Array.from(data.entries()).reduce, ensuring that each key is associated with the string type. Finally, the stringify function is applied to the converted object created from the Map, generate the JSON output.
Steps to use fast-json-stringify library with TypeScript:
Step 1: Initialize a New Project
Open your terminal or command prompt and navigate to the directory where you want to create your TypeScript project. Then run the following command.
npm init
Step 2: Install TypeScript as a dev dependency
You need to install TypeScript as a dev dependency in your project using the below command.
npm install typescript --save-dev
Step 3: Create a tsconfig.json file
The tsconfig.json file contains TypeScript compiler options for your project. Run the following command.
npx tsc --init
Step 4: Install fast-json-stringify
Install the fast-json-stringify library using the below command.
npm install fast-json-stringify
Step 5: Install node types
Install the @types/node into your project directory using the below command.
npm install --save @types/node
Step 6: Compile TypeScript Code
Use below command to compile TypeScript code.
npx tsc
Step 7: Run Your Code
Use the below command to run the code.
node index.js
Project Structure:
Example: The below example uses fast-json-stringify library to convert the map to JSON in TypeScript.
const fastJsonStringify =
require('fast-json-stringify');
const data: Map<string, string> =
new Map([
['name', 'w3wiki'],
['type', 'Education'],
['category', 'Computer Science'],
]);
const temp = fastJsonStringify({
type: 'object',
properties: Array.from(data.entries()).reduce(
(acc: Record<string, { type: string }>, [key, value]) =>
{
acc[key] = { type: 'string' };
return acc;
}, {}),
});
const res = temp(Object.fromEntries(data));
console.log(res);
Output:
How to Convert Map to JSON in TypeScript ?
In TypeScript, we can convert the Map to JSON by manipulating the key-value pairs of the Map into JSON-formatted string. We can use various approaches like JSON.stringify, fast-json-stringify, and json-stringify-safe Libraries for the conversion.
Table of Content
- Using JSON.stringify
- Using fast-json-stringify Library
- Using json-stringify-safe Library
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