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ID vs Data vs Class 2
(version: 0)
Comparing performance of:
ID vs Data vs class vs ID vanilla vs class vanilla vs querySelector Attribute vs querySelector ID vs querySelector Class
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g=" crossorigin="anonymous"></script> <div id="test" data-test="test" class="testing">Testing</div>
Tests:
ID
$('#test').show();
Data
$('[data-test="test"]').show();
class
$('.testing').show();
ID vanilla
document.getElementById("test");
class vanilla
document.getElementsByClassName("testing");
querySelector Attribute
document.querySelector('[data-test="test"]');
querySelector ID
document.querySelector('test');
querySelector Class
document.querySelector('.testing');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (8)
Previous results
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Test case name
Result
ID
Data
class
ID vanilla
class vanilla
querySelector Attribute
querySelector ID
querySelector Class
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its various test cases. **Benchmark Purpose:** The benchmark measures the performance of different approaches to select an HTML element on a webpage using JavaScript. **Options Compared:** 1. **ID**: Using the `id` attribute to select an element, e.g., `$('#test').show();` 2. **Data**: Using the `data-test` attribute to select an element, e.g., `('[data-test="test"]').show();` 3. **Class**: Using the `class` attribute to select an element, e.g., `$('.testing').show();` 4. **Vanilla ID**: Using only the `id` attribute without jQuery (e.g., `document.getElementById("test");`) 5. **Vanilla Class**: Using only the `class` attribute without jQuery (e.g., `document.getElementsByClassName("testing");`) 6. **querySelector Attribute**: Using the `querySelector` method with an attribute selector, e.g., `document.querySelector('[data-test="test"]');` 7. **querySelector ID**: Using the `querySelector` method with an ID selector, e.g., `document.querySelector('test');` 8. **querySelector Class**: Using the `querySelector` method with a class selector, e.g., `document.querySelector('.testing');` **Pros and Cons:** * **ID**: + Pros: Fastest way to select elements by ID. + Cons: May not work if multiple elements have the same ID (which is generally discouraged). * **Data**: + Pros: Works even if multiple elements have the same data-test attribute value. + Cons: May be slower than using IDs, as it requires a DOM lookup. * **Class**: + Pros: Works for elements with multiple class attributes. + Cons: May be slower than using IDs or data-test attributes. * **Vanilla ID**: Pros: Lightweight and fast. Cons: Requires manual DOM manipulation to find the element by ID. * **Vanilla Class**: Pros: Lightweight and fast. Cons: Requires manual DOM manipulation to get an array of matching elements, which can be slow. * **querySelector Attribute**: + Pros: Flexible and efficient way to select elements using attributes. + Cons: May be slower than native attribute-based selectors (e.g., `getElementById`). * **querySelector ID**: Pros: Fast and efficient. Cons: Limited flexibility compared to querySelectorAttribute. * **querySelector Class**: + Pros: Flexible and efficient way to select elements by class. + Cons: May be slower than using IDs. **Other Considerations:** * The use of jQuery and its methods (e.g., `$('#test').show();`) introduces an additional overhead due to the library's complexity and performance requirements. * The benchmark results are likely skewed by the browser's caching behavior, which can impact performance when running multiple iterations with the same input. **Alternatives:** 1. Using native attribute-based selectors (e.g., `document.getElementById`, `document.getElementsByClassName`) without jQuery. 2. Implementing custom attribute-based selectors or using a library like Sizzle or CSS Selectors for more efficient element selection. 3. Using a different HTML structure, such as using IDs and classes in a more optimal way to reduce the number of elements with multiple attributes. In summary, the benchmark highlights the importance of considering performance, flexibility, and maintainability when selecting HTML elements on a webpage.
Related benchmarks:
jQuery 3.3.1 slim by id vs Document.getElementById
Vanilla JS vs jQuery Selectors
Vanilla JS vs jQuery Selectors - v2
ID vs Data vs Class
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