Benchmark: clearClassList vs className

Script Preparation code:

var node = document.createElement('div');

node.className = 'some class names';

Tests:

clearClassList
const classList = node.classList; while (classList.length > 0) { classList.remove(classList.item(0)); }
className
node.className = '';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
clearClassList
className

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):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what is being tested.

**Benchmark Definition:**

The benchmark defines two test cases:

1. `clearClassList`: This test case clears the class list of an HTML element using the `classList` property. The script preparation code creates a new HTML element, sets its class name, and then iterates through the class list to remove each class.
2. `className`: This test case simply sets the class name of an HTML element to an empty string.

**Options Compared:**

The benchmark is comparing two approaches:

1. **clearClassList**: Uses the `classList` property to clear the class list of an element.
2. **className**: Directly modifies the `className` attribute of an element to an empty string.

**Pros and Cons:**

* `clearClassList`:
	+ Pros:
		- More efficient, as it uses a single loop to remove all classes.
		- Less prone to errors, as it doesn't rely on setting individual class names.
	+ Cons:
		- Might require more code or additional libraries if not implemented correctly.
* `className`:
	+ Pros:
		- Simpler and easier to implement, as it only requires modifying a single attribute.
	+ Cons:
		- Less efficient, as it involves setting individual class names, which can be slower than clearing the entire list.

**Library:**

The benchmark uses the `classList` property, which is a built-in JavaScript feature introduced in HTML5. The `classList` property allows elements to have multiple classes without the need for separate attributes like `class`.

**Special JS Feature/Syntax:**

This benchmark does not use any special JavaScript features or syntax beyond the built-in `classList` property.

**Other Alternatives:**

Other alternatives to clearClassList might include:

* Using a library like jQuery, which provides a `.removeClass()` method.
* Implementing a custom solution using the `setAttribute()` and `getAttribute()` methods to remove individual classes.

However, as mentioned earlier, the built-in `classList` property is a widely supported and efficient way to clear class lists in modern browsers.

**Benchmark Preparation Code:**

The script preparation code creates a new HTML element and sets its class name:
```javascript
var node = document.createElement('div');
node.className = 'some class names';
```
This code is executed before each test case to create the necessary element for testing.

Related benchmarks:

clearClassList vs className (version: 0)

Comparing performance of: clearClassList vs className

Created: 6 years ago by: Guest

Jump to the latest result

clearClassList

className

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):