Introduction to Stringify Object

The stringify-object library is an essential tool for JavaScript developers who need to convert objects into strings. This library offers an easy-to-use API that enables developers to handle different scenarios and requirements when stringifying objects. Here, we’re going to explore a variety of APIs provided by stringify-object along with code samples and practical usage within an application.

Basic Usage

const stringify = require('stringify-object');
const obj = {
  foo: 'bar',
  baz: [1, 2, 3],
  qux: { hello: 'world' }
};
console.log(stringify(obj));

Indentation

const stringify = require('stringify-object');
const obj = {
  foo: 'bar',
  baz: [1, 2, 3],
  qux: { hello: 'world' }
};
console.log(stringify(obj, {
  indent: '  '
}));

Handle Circular References

const stringify = require('stringify-object');
const obj = { foo: 'bar' };
obj.circular = obj;
console.log(stringify(obj, {
  filter: (obj, prop) => prop !== 'circular'
}));

Excluding Properties

const stringify = require('stringify-object');
const obj = {
  foo: 'bar',
  password: '12345'
};
console.log(stringify(obj, {
  filter: (obj, prop) => prop !== 'password'
}));

Customizing Property Values

const stringify = require('stringify-object');
const obj = {
  foo: 'bar',
  baz: 'qux'
};
console.log(stringify(obj, {
  transform: (obj, prop, originalResult) => {
    if (prop === 'baz') {
      return 'transformed';
    }
    return originalResult;
  }
}));

App Example Using Stringify Object

Below is an example of a simple Node.js application that utilizes stringify-object to log the stringified version of an object. This example demonstrates various APIs as well as a practical implementation.

const express = require('express');
const stringify = require('stringify-object');
const app = express();
const PORT = 3000;

app.get('/', (req, res) => {
  const obj = {
    foo: 'bar',
    baz: [1, 2, 3],
    qux: { hello: 'world' }
  };
  
  const response = stringify(obj, {
    indent: '  ',
    transform: (obj, prop, originalResult) => {
      if (prop === 'baz') {
        return 'transformed';
      }
      return originalResult;
    }
  });

  res.send(`
${response}
`);

});
app.listen(PORT, () => {

  console.log(`Server is running on http://localhost:${PORT}`);

});


Start the server and navigate to http://localhost:3000 to see the stringified object as a formatted string in the response. Customize the object and settings as needed for your specific use case.
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