Tutorials

jQuery jQuery.isPlainObject() Method

Posted in jQuery Tutorial

Updated on Nov 21, 2024

By Mari Selvan

👁️ 39 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

jQuery offers a multitude of methods that simplify JavaScript development, one of which is the jQuery.isPlainObject() method. This method provides a straightforward way to determine whether an object is a plain JavaScript object, distinguishing it from other types such as arrays or DOM elements.

In this comprehensive guide, we'll explore the usage of the jQuery.isPlainObject() method, its syntax, parameters, and practical examples to help you leverage its power effectively in your projects.

🧠 Understanding jQuery.isPlainObject() Method

The jQuery.isPlainObject() method checks whether the passed object is a plain JavaScript object created by {} or new Object(). It returns true if the object is a plain object, otherwise false.

💡 Syntax

The syntax for the jQuery.isPlainObject() method is straightforward:

syntax.js

Copied

jQuery.isPlainObject( object )

Parameters:

object: The object to be tested.

Return Value:

true: If the passed object is a plain JavaScript object.
false: If the passed object is not a plain JavaScript object.

📝 Example

Testing a Plain Object:
example.js
Copied
```
var obj = {};
var result = jQuery.isPlainObject(obj);
console.log(result); // Output: true
```
In this example, obj is a plain JavaScript object, so jQuery.isPlainObject() returns true.
Testing a Non-Plain Object:
example.js
Copied
```
var arr = [];
var result = jQuery.isPlainObject(arr);
console.log(result); // Output: false
```
Here, arr is an array, not a plain object, so jQuery.isPlainObject() returns false.
Practical Usage in jQuery Plugins:

jQuery plugins often need to validate input parameters, especially when dealing with options objects. Here's how jQuery.isPlainObject() can be used to validate an options object:
example.js
Copied
```
function myPlugin(options) {
	if (!jQuery.isPlainObject(options)) {
			throw new Error('Options must be a plain object.');
	}
	// Plugin logic here
}
```
This ensures that the options parameter passed to the plugin is indeed a plain object.

🎉 Conclusion

The jQuery.isPlainObject() method provides a convenient way to determine whether an object is a plain JavaScript object. Its simplicity and reliability make it an invaluable tool for JavaScript developers, particularly when working with jQuery plugins, validating input parameters, or performing object-oriented programming tasks.

By understanding its usage and incorporating it into your projects, you can write cleaner, more robust JavaScript code.