Introduction to object-inspect

The object-inspect library is a powerful tool for JavaScript developers, providing deep inspection capabilities for objects and values. It offers a variety of APIs to investigate and understand complex data structures more effectively. This article will introduce numerous object-inspect APIs with code snippets to help you master this library. Let’s dive in!

Useful API Examples

1. Basic Usage

const inspect = require('object-inspect');
const obj = { a: 1, b: [2, 3], c: { d: 4 } };
console.log(inspect(obj)); // Object { a: 1, b: [ 2, 3 ], c: Object { d: 4 } }

2. Custom Depth

const inspect = require('object-inspect');
const deepObj = { a: { b: { c: { d: 1 } } } };
console.log(inspect(deepObj, { depth: 2 })); // Object { a: Object { b: Object } }

3. Show Hidden

const inspect = require('object-inspect');
const obj = Object.create({}, { foo: { value: 'bar', enumerable: false } });
console.log(inspect(obj, { showHidden: true })); // Object { [foo]: 'bar' }

4. Inspect Symbols

const inspect = require('object-inspect');
const sym = Symbol('sym');
const obj = { [sym]: 'value' };
console.log(inspect(obj)); // Object { [Symbol(sym)]: 'value' }

5. Custom Inspect Function

const inspect = require('object-inspect');
const obj = {
  a: 1,
  inspect() {
    return 'Custom inspect function';
  }
};
console.log(inspect(obj)); // Custom inspect function

6. Custom Options

const inspect = require('object-inspect');
const obj = { a: 1, b: 2 };
const options = {
  stylize: (str, styleType) => { return str.toUpperCase(); }
};
console.log(inspect(obj, options)); // OBJECT { A: 1, B: 2 }

App Example

Here’s an example application using object-inspect to debug a complex object.

// app.js
const inspect = require('object-inspect');

class User {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }
}

const users = [
  new User('Alice', 30),
  new User('Bob', 26),
  { admin: new User('Eve', 34) }
];

users.forEach((user, index) => {
  console.log(`User ${index + 1}: ${inspect(user, { showHidden: true })}`);
});

This code creates a simple user database and uses object-inspect to display the details of each user, including any hidden properties.

In conclusion, object-inspect is a fantastic library to enhance your debugging skills in JavaScript. With its versatility and powerful inspection capabilities, you can easily manage and understand complex object structures. Start using object-inspect today to make your development process smoother and more efficient.

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