Benchmark: Teste class check jQuery x Vanilla

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div id="el" class="test test2"></div>

Tests:

Vanilla classlist check
document.querySelector(".test").classList.contains('test2')
jQuery class check
$(".test").hasClass("test2");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Vanilla classlist check
jQuery class check

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON to understand what is being tested, compared, and the pros and cons of different approaches.

**Benchmark Overview**

MeasureThat.net is a website where users can create and run JavaScript microbenchmarks. The benchmark in question tests the performance of two different approaches to check if an HTML element contains a specific class: Vanilla (native JavaScript) and jQuery.

**Script Preparation Code**

The script preparation code includes a reference to the jQuery library, which is loaded asynchronously via a `<script>` tag. This means that any subsequent scripts or code will execute after jQuery has finished loading.

```html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
```

**Individual Test Cases**

There are two test cases:

1. **Vanilla classlist check**: `document.querySelector(".test").classList.contains('test2')`
This test case uses the native JavaScript `querySelector` and `classList` methods to check if an element with the class `test2` exists.
2. **jQuery class check**: `$(".test").hasClass("test2");`

Both test cases are checking if the `el` element contains the class `test2`.

**Comparison**

The comparison is between the Vanilla (native JavaScript) approach and the jQuery approach.

**Pros and Cons of Different Approaches:**

1. **Vanilla (Native JavaScript)**:
	* Pros:
		+ Lightweight and performance-friendly.
		+ Does not rely on a library, reducing overhead.
		+ Can be used without any additional dependencies.
	* Cons:
		+ May require additional code to handle class existence checks.
2. **jQuery**:
	* Pros:
		+ Provides a standardized way to select elements and manipulate their classes.
		+ Often used in web development, making it easy to find resources and communities.
		+ Can be used for DOM manipulation beyond just checking class existence.
	* Cons:
		+ Adds overhead due to the library itself and its dependencies.
		+ May not perform as well as native JavaScript methods.

**Library: jQuery**

jQuery is a popular JavaScript library that simplifies HTML document traversal and manipulation. It provides a range of features, including:

* Selecting elements using CSS selectors
* Manipulating element properties and attributes
* Handling events

In this benchmark, jQuery's `hasClass` method is used to check if an element contains a specific class.

**Special JS Features or Syntax:**

None mentioned in the provided JSON. However, some modern JavaScript features like async/await, `let` and `const`, arrow functions, and template literals are not present in this code snippet.

**Other Alternatives:**

If you prefer to use other libraries or approaches for class existence checks, consider:

* **Lodash**: A utility library that provides a `hasClass` function.
* **React's `useMemo` hook**: Can be used to memoize and optimize class existence checks.
* **Modern JavaScript methods**: Such as using `Element.prototype.contains()` or `CSS Classes API`.

Keep in mind that these alternatives might have varying levels of overhead, depending on the specific use case.

Related benchmarks:

Teste class check jQuery x Vanilla (version: 0)

Comparing performance of: Vanilla classlist check vs jQuery class check

Created: 5 years ago by: Guest

Jump to the latest result

Vanilla classlist check

jQuery class check

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):