Benchmark: Css vs javascript add classre

HTML Preparation code:

<style>
#myDIV{
transform: translateX(-110%)!important;
color:red;
}
.mystyle {
  transform: translateX(0%)!important;
}
</style>
<div id="myDIV">
I am a DIV element
</div>

Tests:

java
document.getElementById("myDIV").style.transform = "translateX(0%)";
css add
document.getElementById("myDIV").classList.add("mystyle");
css remove
document.getElementById("myDIV").classList.remove("mystyle");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
java
css add
css remove

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches:

1. JavaScript: Using `document.getElementById("myDIV").classList.add("mystyle");`
2. CSS: Using `document.getElementById("myDIV").style.transform = "translateX(0%)";`

Both approaches aim to add a style class (`"mystyle"` for CSS and `"mystyle"` for JavaScript) to an HTML element with the ID `"myDIV"`.

**Library and Purpose**

The `classList` property is part of the W3C DOM API, introduced in HTML5. It allows developers to easily manage classes on an element without having to manually update the `className` attribute or using inline styles.

In this benchmark, we're leveraging the `classList.add()` method to add a new class to the element, which triggers a CSS rule lookup and applies the corresponding style.

**JavaScript Feature**

The `classList.add()` method is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It provides a convenient way to manage classes on an element without having to manually update the `className` attribute or using inline styles.

This feature allows developers to write more concise and readable code, making it easier to maintain complex class hierarchies.

**Other Alternatives**

If you're not using modern JavaScript features like `classList`, you can achieve similar results by:

1. Using `document.getElementById("myDIV").className += "mystyle";`
2. Using `document.getElementById("myDIV").style.className = "mystyle";`

However, these approaches require manual class management and are less efficient than using the `classList` property.

**Pros and Cons of Different Approaches**

Here's a summary of the pros and cons for each approach:

* **JavaScript (classList)**:
	+ Pros: Concise code, easy to manage classes, modern feature.
	+ Cons: May not be supported in older browsers or environments.
* **CSS**:
	+ Pros: Widespread support across browsers and devices, efficient performance.
	+ Cons: Requires additional CSS rules, less concise than JavaScript approach.

In general, using `classList` is the recommended approach due to its conciseness, readability, and modernity. However, for older environments or specific use cases where CSS may be preferred, it can still be a viable option.

**Benchmark Considerations**

When creating benchmarks like this one, consider the following factors:

* **Relevance**: Ensure that the benchmark tests relevant performance characteristics of your application.
* **Fairness**: Choose test cases that accurately represent real-world scenarios and minimize external influences (e.g., network latency).
* **Variability**: Include multiple runs to account for variability in execution times and device-specific differences.

By considering these factors, you can create reliable and informative benchmarks that help developers optimize their code.

Related benchmarks:

Css vs javascript add classre (version: 0)

Comparing performance of: java vs css add vs css remove

Created: 4 years ago by: Guest

Jump to the latest result

java

css add

css remove

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):