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closest() vs parent().parent() + hasClass()
(version: 0)
Checking if double parent() + hasClass() validation is really faster than just going for closest().
Comparing performance of:
closest vs parents + hasClass
Created:
4 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="tuttifrutti" > <div class="gasodas"> <div class="banga"> <div class="dayum"> <div class="dada"> <div id="phew" class="potat">boop</div> </div> </div> </div> </div> </div>
Script Preparation code:
var yes = $('phew');
Tests:
closest
yes.closest('.my-fancy-class');
parents + hasClass
yes.parent().parent().hasClass('my-fancy-class');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
closest
parents + hasClass
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
8 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko/20100101 Firefox/142.0
Browser/OS:
Firefox 142 on Windows
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Test name
Executions per second
closest
9195675.0 Ops/sec
parents + hasClass
2711164.5 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark definition and test cases, explaining what's being tested, the pros and cons of each approach, and other considerations. **Benchmark Definition** The `closest()` vs `parent().parent() + hasClass()` benchmark compares the performance of two approaches to check if an element exists in a DOM tree: 1. `closest()`: A jQuery method that finds the closest ancestor matching the given selector. 2. `parent().parent().hasClass('my-fancy-class')`: A chain of methods that first finds the parent of the current element, then finds its parent again ( effectively going up two levels), and finally checks if the resulting element has a specific class (`my-fancy-class`). **Pros and Cons:** * `closest()`: + Pros: - More efficient as it only traverses the DOM tree until it finds a matching ancestor. - Often faster, especially for elements with multiple parents. + Cons: - May not work correctly if the element has no parent or if the parent is not in the DOM tree. * `parent().parent().hasClass('my-fancy-class')`: + Pros: - Works even if the element has no parent, as it will simply return false. - Can be useful when working with elements that don't have a parent, like document roots or child elements of other elements' children. + Cons: - Requires two additional traversals through the DOM tree, making it generally slower than `closest()`. - May cause performance issues for deeply nested elements. **Other Considerations:** * The benchmark uses jQuery's `$` function to select and manipulate elements. This adds an overhead due to the library's complexity. * The use of `hasClass()` with a specific class (`my-fancy-class`) is likely used here as a placeholder. In a real-world scenario, you would typically use a more meaningful class name. **Test Case Analysis** The test cases provided are: 1. `closest()`: This test case uses the `closest()` method to find an element matching a specific selector. 2. `parents + hasClass`: This test case uses the chain of methods `parent().parent().hasClass('my-fancy-class')` to achieve the same result as the first test case. **Library:** The `hasClass()` function is part of jQuery's utility library. Its purpose is to check if an element has a specific class attached to it. **Special JavaScript Features/Syntax:** * There are no special features or syntax used in this benchmark beyond standard JavaScript and jQuery. * However, the use of `$` (the dollar sign) as a function reference is a common convention in jQuery code. This notation allows jQuery to execute the provided callback function when the element is found. **Alternatives:** If you need an alternative implementation, consider using: 1. `element.contains()` for a similar purpose to `closest()`, but without the chaining overhead. 2. A custom solution that only traverses the DOM tree up to a certain depth or using a more efficient algorithm like CSS selector matching. 3. Other libraries or frameworks that provide similar functionality, such as React's `useRef` and `useState` hooks for element management. Keep in mind that these alternatives might have different performance characteristics, so it's essential to test them thoroughly before making a decision.
Related benchmarks:
Selector performance in JQuery 3
$ Selector performance in JQuery 3
jQuery parents() vs closest()
While loop parentElement vs closest (vanilla javascript)
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