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jQuery addClass vs jQuery classList.add vs querySelector classList.add
(version: 0)
Comparing performance of:
jQuery addClass vs jQuery classList.add vs querySelector classList.add
Created:
6 years ago
by:
Guest
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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");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
jQuery addClass
jQuery classList.add
querySelector 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 dive into the provided Benchmark Definition JSON and explain what is being tested. **Benchmark Overview** The benchmark compares three different approaches to adding a class to an HTML element using JavaScript: 1. jQuery `addClass` 2. jQuery `classList.add` 3. `querySelector` with `classList.add` **Options Being Compared** The options are compared in terms of their performance, which is measured by the number of executions per second. **Pros and Cons of Each Approach** ### jQuery `addClass` * **Pros**: jQuery's `addClass` method is a convenient and straightforward way to add a class to an element. It also provides additional features like adding multiple classes at once and handling edge cases. * **Cons**: As the benchmark shows, jQuery's `addClass` method can be slower than other approaches due to its overhead. ### jQuery `classList.add` * **Pros**: jQuery's `classList.add` method is a more modern approach that leverages the `classList` API. It provides better performance and is easier to read. * **Cons**: The `classList` API was introduced in modern browsers, so this approach might not work in older browsers. ### `querySelector` with `classList.add` * **Pros**: This approach uses the `querySelector` method to select the element and then calls `classList.add` on it. It's a lightweight and efficient way to add a class. * **Cons**: This approach requires accessing the DOM, which can be slower than using jQuery or libraries that provide a shortcut. **Library and Purpose** The library used here is jQuery, a popular JavaScript library for DOM manipulation and event handling. The `classList` API is also used, which provides an efficient way to work with classes in HTML elements. **Special JS Features/Syntax** None mentioned explicitly, but note that the use of `querySelector` assumes support for modern CSS selectors. Also, the `classList.add` method relies on the `classList` property, which was introduced in modern browsers as part of the DOM Standard. **Other Alternatives** If you're interested in exploring alternative approaches, here are a few options: * Using plain JavaScript to access the element's classList: `document.getElementById("el").classList.add("test")` * Using a library like VanillaJS or Lodash to simplify DOM manipulation * Implementing a custom class management system Keep in mind that these alternatives might not be as efficient or convenient as using jQuery or leveraging modern browser APIs. I hope this explanation helps!
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