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Testing parent container
(version: 0)
Comparing speed of getting element by id with jQuery vs Vanilla JS with getElementById and querySelector
Comparing performance of:
jQuery vs getElementById
Created:
5 years ago
by:
Guest
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HTML Preparation code:
<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script> <div id="parent" class="test class list classes"> <div id="testElement" class="test class list classes child c2"></div> <div id="testElement" class="test class list classes child c1"></div> <div id="testElement" class="test class list classes abc"></div> <div id="testElement" class="test class list classes abc"></div> <div id="testElement" class="test class list classes child c2"></div> <div id="testElement" class="test class list classes child c1"></div> </div>
Tests:
jQuery
var one = $("#parent").find(".c1") var two = $("#parent").find(".c2")
getElementById
var one = document.getElementsByClassName("c1") var two = document.getElementsByClassName("c2")
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
jQuery
getElementById
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 definition and test cases. **Benchmark Definition** The benchmark compares two approaches to select an element by its ID: jQuery vs Vanilla JS with `getElementById` and `querySelector`. **Options Compared** 1. **jQuery**: Uses the jQuery library to select elements by their class, id, and attribute. 2. **Vanilla JS (with getElementById)**: Uses the native JavaScript method `getElementById` to select an element by its ID. **Pros and Cons of Each Approach** **jQuery** Pros: * Easier to write, especially for complex selection scenarios * Provides a more intuitive API for selecting elements by class or attribute Cons: * Requires an additional library (jQuery) to be loaded * May introduce overhead due to the library's functionality **Vanilla JS (with getElementById)** Pros: * Lightweight and fast * Does not require an additional library * Still allows for accurate selection of elements by ID Cons: * Can be more verbose, especially for complex scenarios * May require more manual error handling **Other Considerations** * **QuerySelector**: Another approach could have been used in the Vanilla JS comparison, which is also available in modern browsers. However, since it's not mentioned in the benchmark definition, we'll focus on `getElementById`. * **Class List API**: Although not explicitly mentioned, using the Class List API (e.g., `classList.contains()`) might be a more modern and efficient way to check for class presence in some cases. **Library: jQuery** jQuery is a popular JavaScript library that simplifies DOM manipulation and event handling. In this benchmark, it's used to select elements by their class (`$(\"#parent\").find(\".c1\")`) and id (`$(\"#parent\").find(\"#testElement\")`). **Special JS Feature/Syntax** None mentioned in the provided code or benchmark definition. **Benchmark Preparation Code and HTML** The preparation code is empty, indicating that it's not necessary to perform any setup before running the test. The provided HTML structure includes multiple elements with IDs (`testElement`) and classes (`c1`, `c2`, etc.). **Alternative Approaches** If you wanted to include an alternative approach in the benchmark: * **QuerySelector**: Using `querySelector` and `querySelectorAll` to select elements by class or ID. * **Class List API**: Using the Class List API to check for class presence. These alternatives could provide additional insights into the performance differences between the approaches.
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