Benchmark: Toggle Classses - MeasureThat.net

HTML Preparation code:

<!DOCTYPE html>
<html>
<head>
	<title>Color Changer</title>
	<style type="text/css">
		.purple {
			background: purple;
		}
	</style>
</head>
<body>
	<button>CLICK ME!</button>
	<script type="text/javascript" src="exercise1.js"></script>
</body>
</html>

Tests:

Toggle
document.querySelector("button").addEventListener("click", function(){ document.body.classList.toggle("purple") });
ClassName + remove
document.querySelector("button").addEventListener("click", function(){ document.body.className = "purple" document.body.classList.remove = "purple" });
My way
var isWhite = true; document.querySelector("button").addEventListener("click", function (){ if (isWhite){ document.body.style.background = "purple"; } else { document.body.style.background = "white"; } isWhite = !isWhite; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Toggle
ClassName + remove
My way

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.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question, "Toggle Classses", tests the performance of three different approaches for toggling a CSS class on an HTML element.

**Test Cases**

The test cases are defined in two parts:

1. **Benchmark Definition**: A JSON object that specifies the test case. Each test case has a unique name and a description.
2. **Individual Test Cases**: An array of objects, each representing a specific test case. Each test case has a `Benchmark Definition` property that contains a JavaScript code snippet.

**Test Case 1: Toggle**

The first test case uses the `classList.toggle()` method to toggle the "purple" class on the `body` element when the button is clicked.
```javascript
document.querySelector("button").addEventListener("click", function(){
    document.body.classList.toggle("purple");
});
```
This approach is concise and efficient, as it only requires a single method call.

**Test Case 2: ClassName + remove**

The second test case uses the `className` property to set and then immediately remove the "purple" class on the `body` element when the button is clicked.
```javascript
document.querySelector("button").addEventListener("click", function(){
    document.body.className = "purple";
    document.body.classList.remove("purple");
});
```
This approach may be less efficient than the first one, as it involves two method calls and potentially slower string manipulation.

**Test Case 3: My way**

The third test case uses a simple if-else statement to check the `isWhite` variable and set the background color accordingly.
```javascript
var isWhite = true;
document.querySelector("button").addEventListener("click", function () {
    if (isWhite) {
        document.body.style.background = "purple";
    } else {
        document.body.style.background = "white";
    }
    isWhite = !isWhite;
});
```
This approach is more verbose and may be slower due to the additional conditional statements.

**Library**

There is no explicit library mentioned in the benchmark, but it appears that `document.querySelector()` and `document.body.classList` are used as part of the browser's DOM API.

**Special JS Features or Syntax**

None mentioned.

**Other Alternatives**

Other approaches could be explored, such as:

* Using a CSS class list library (e.g., jQuery UI's `toggleClass()` method)
* Employing a different toggle mechanism (e.g., using a boolean flag and bitwise operators)
* Optimizing the code for performance by reducing the number of method calls or using more efficient data structures

**Pros and Cons**

Each approach has its pros and cons:

1. **Toggle**: Pros: concise, efficient; Cons: may not be suitable for all use cases (e.g., when `classList` is disabled).
2. **ClassName + remove**: Pros: well-established API, easy to implement; Cons: less efficient than the first approach.
3. **My way**: Pros: more control over the implementation; Cons: verbose, potentially slower.

**Alternatives and Considerations**

When choosing an approach, consider factors such as:

* Performance requirements
* Code readability and maintainability
* Browser support and compatibility
* Library or framework dependencies

In this benchmark, MeasureThat.net provides a simple and concise way to compare the performance of different approaches. By using a standardized format for benchmarking, users can easily reproduce and share results, facilitating further research and optimization efforts.

Related benchmarks:

Toggle Classses (version: 0)

Comparing performance of: Toggle vs ClassName + remove vs My way

Created: 8 years ago by: Guest

Jump to the latest result

Toggle

ClassName + remove

My way

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):