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jQuery addClass vs jQuery classList.add vs querySelector classList.add111
(version: 0)
Comparing performance of:
jQuery addClass vs jQuery classList.add vs querySelector classList.add vs getElementById classList.add
Created:
6 years ago
by:
Registered User
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HTML Preparation code:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <div id="el"></div>
Script Preparation code:
document.getElementById("el").classList.remove("test");
Tests:
jQuery addClass
$("#el").addClass("test");
jQuery classList.add
$("#el")[0].classList.add("test");
querySelector classList.add
document.querySelector("#el").classList.add("test");
getElementById classList.add
document.getElementById("el").classList.add("test");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
jQuery addClass
jQuery classList.add
querySelector classList.add
getElementById classList.add
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested, compared, and the pros/cons of each approach. **Benchmark Overview** The benchmark measures the performance difference between four different ways to add a class to an HTML element: 1. jQuery `addClass` method 2. jQuery `classList.add` method (with `$()` notation) 3. `querySelector` with `classList.add` 4. `getElementById` with `classList.add` **Comparison** The benchmark compares the performance of these four approaches in Chrome 78 on a Windows 7 desktop. Here's a brief overview of each approach: * **jQuery `addClass` method**: This is a simple method that adds a class to an element without removing any existing classes. It's widely used in web development but can lead to issues if not used carefully. * **jQuery `classList.add` method (with `$()` notation)**: This method uses the `classList` property of the element and adds a new class to it. The `$()` notation is used to select the element, which can be slower than using `querySelector`. * **`querySelector` with `classList.add`**: This approach uses the `querySelector` API to select an element by its CSS selector and then calls `classList.add` on that element. * **`getElementById` with `classList.add`**: This approach uses the `getElementById` method to retrieve an element by its ID and then calls `classList.add` on that element. **Pros/Cons of each approach** Here's a brief summary: * **jQuery `addClass` method**: + Pros: Simple, widely supported + Cons: Can lead to issues with class duplication, slower performance compared to other methods * **jQuery `classList.add` method (with `$()` notation)**: + Pros: More flexible than `addClass`, faster performance + Cons: Requires jQuery library, can be slower due to the extra step of selecting the element * **`querySelector` with `classList.add`**: + Pros: Fast, efficient, modern API + Cons: Not supported in older browsers, may require additional setup for performance * **`getElementById` with `classList.add`**: + Pros: Simple, fast + Cons: Requires retrieval of the element by its ID, which can be slower than using other methods **Library usage** The benchmark uses jQuery library to provide the `addClass` and `classList.add` methods. The `querySelector` method is a native API in modern browsers. **Special JS features/syntax** None of the test cases use special JavaScript features or syntax beyond what's standard for modern web development (e.g., no async/await, no let/catch).
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jQuery addClass vs jQuery classList.add vs querySelector classList.add
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