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jQuery by className vs Document.getElementsByClassName
(version: 0)
Benchmark.js
Comparing speed of getting element by class name with jQuery vs Vanilla JS
Comparing performance of:
jQuery vs Vanilla JS
Created:
8 years ago
by:
Guest
Go to the latest result
HTML Preparation code:
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script> <div id="testElement"></div>
Tests:
jQuery
var el = $(".testElement")[0]; var className = el.className;
Vanilla JS
var el = document.getElementsByClassName('testElement'); var className = el.className;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
jQuery
Vanilla JS
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
Browser/OS:
Firefox 132 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=565934" width="100%" height="500px"></iframe>
Vanilla JS
4.0M/s
jQuery
0/s
View exact numbers
Test name
Executions per second
✓
Vanilla JS
4,032,639 Ops/sec
jQuery
0 Ops/sec
Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the explanation. **Benchmark Description:** The benchmark tests the speed of getting an HTML element by its class name using two different approaches: 1. **jQuery**: Using the jQuery library to select the element and then accessing its `className` property. 2. **Vanilla JS (Document.getElementsByClassName)**: Using a native JavaScript method (`getElementsByClassName`) provided by the Document object to select the element and then accessing its `className` property. **Test Case Description:** Each test case consists of two parts: 1. A script that sets up the environment for the test, in this case, selecting an HTML element with the class name "testElement" using either jQuery or the native JavaScript method. 2. A statement that accesses the `className` property of the selected element. **Library and Purpose:** The benchmark uses **jQuery**, a popular JavaScript library that simplifies DOM manipulation and event handling. In this case, jQuery is used to select an HTML element by its class name using the `$()` method, which is equivalent to calling `document.querySelector()` or `document.querySelectorAll()` in native JavaScript. **Special JS Feature or Syntax:** None in this specific benchmark. **Pros/Cons of Different Approaches:** 1. **jQuery**: * Pros: + Easier to use and more concise code. + Supports older browsers that don't have the latest JavaScript features. * Cons: + Additional library overhead, which can impact performance in some cases. + May not be suitable for very large or complex applications. 2. **Vanilla JS (Document.getElementsByClassName)**: * Pros: + Native implementation, no additional library overhead. + Suitable for large-scale applications where performance is critical. * Cons: + Requires more verbose code compared to jQuery. + May not be compatible with older browsers that don't support the latest JavaScript features. **Other Alternatives:** Other alternatives to achieve this benchmark include: 1. **Document.querySelector()**: A native JavaScript method that selects an element by its CSS selector, including class names. 2. **document.querySelectorAll()**: A native JavaScript method that returns a NodeList of elements matching a given CSS selector, including class names. 3. **Modern JavaScript features** (e.g., `querySelector` and `querySelectorAll`): If you're targeting modern browsers only, you can use these more efficient methods to select elements. Keep in mind that the best approach depends on your specific requirements, such as browser support, code maintainability, and performance needs.
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