Benchmark: toggle - className vs. setAttribute vs. classList

HTML Preparation code:

<div id="foo"></div>

Tests:

className
var element = document.getElementById("foo"); var i = 1000; var test=true; test=!test; while (i--) { element.className = test?"foo bar":"foo"; }
setAttribute
var element = document.getElementById("foo"); var i = 1000; var test=true; while (i--) { element.setAttribute("class", test?"foo bar":"foo"); test=!test; }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.toggle("bar"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
className
setAttribute
classList

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark created on MeasureThat.net, which compares the performance of three different approaches to toggle the class name of an HTML element: `className`, `setAttribute`, and `classList`.

**Approaches Compared**

1. **`className`**: This approach uses the `className` property directly to set the value of the `class` attribute.
2. **`setAttribute`**: This approach uses the `setAttribute()` method to dynamically set the value of the `class` attribute.
3. **`classList`**: This approach uses the `classList` property, which is a collection-like object that provides methods for adding, removing, and toggling class names.

**Pros and Cons**

1. **`className`**:
	* Pros: Simple and straightforward, no additional libraries required.
	* Cons: May not be supported in older browsers or with specific CSS rules (e.g., `class` attribute).
2. **`setAttribute`**:
	* Pros: Widely supported across browsers and CSS versions.
	* Cons: Requires explicit method calls, which can lead to slower performance compared to other approaches.
3. **`classList`**:
	* Pros: Modern and efficient, provides methods for class manipulation (e.g., `toggle()`).
	* Cons: Requires modern browser support and may not be supported in older browsers.

**Library Usage**

The benchmark uses the `classList` property, which is a part of the HTML5 standard. The `classList` property provides an interface for manipulating class names, including methods like `toggle()`, `add()`, and `remove()`.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark.

**Alternatives**

Other alternatives to compare include:

1. **Using CSS classes**: Instead of manipulating the `class` attribute directly, you could use CSS classes with classes like `.foo bar`.
2. **Using a library**: You could use libraries like jQuery or Lodash to simplify class manipulation.
3. **Native methods**: Some browsers provide native methods for class manipulation, such as `Element.classList.add()` and `Element.classList.remove()`, which could be used instead of the `classList` property.

In conclusion, this benchmark provides a simple comparison of three different approaches to toggle the class name of an HTML element, highlighting the pros and cons of each approach and providing insights into modern JavaScript best practices.

Related benchmarks:

toggle - className vs. setAttribute vs. classList (version: 0)

Comparing performance of: className vs setAttribute vs classList

Created: 3 years ago by: Guest

Jump to the latest result

className

setAttribute

classList

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):