Benchmark: style.display = none vs. classList add hide Forejy

HTML Preparation code:

<style type="text/css">
        .hide {
            display: none;
        }
</style>
<div id="foo"></div>

Tests:

style.display = none
var element = document.getElementById("foo"); var i = 3000; while (i--) { element.style.display = 'none'; element.style.display = 'block'; }
classList add hide
var element = document.getElementById("foo"); var i = 3000; while (i--) { element.classList.add("hide"); element.classList.remove("hide"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style.display = none
classList add hide

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.

I'd be happy to explain the benchmark and its results.

**What is being tested?**

The provided JSON represents two different approaches to hiding an HTML element in JavaScript:

1. **`style.display = 'none'`**: This approach sets the `display` CSS property of the element to `none`, which hides the element.
2. **`classList.add('hide')` and `classList.remove('hide')`**: This approach uses the `classList` API to add and remove a class named `hide`. The `hide` class is defined in an external stylesheet (`<style>...</style>`).

**Options being compared**

The two approaches are being compared on the same test cases, which are:

1. Creating an HTML element with the ID "foo" using `document.getElementById("foo")`.
2. Setting up a while loop that toggles the visibility of the element using either approach.

**Pros and Cons of each approach**

**`style.display = 'none'`**

Pros:

* Simple and straightforward to implement.
* Works well in most browsers, including older ones.

Cons:

* Can be slower than other approaches, especially for larger numbers of elements.
* May not work as expected in some cases, such as when the element is used in a CSS grid or flexbox layout.

**`classList.add('hide')` and `classList.remove('hide')`**

Pros:

* More efficient and faster than setting `display` directly.
* Works well with modern browsers and their CSS features.

Cons:

* Requires an external stylesheet to define the `hide` class, which can be an extra step.
* May require additional setup for older browsers that don't support the `classList` API.

**Library usage**

The `classList` API is used in both test cases. The `classList` API provides a way to manage classes (also known as "namespaces") on HTML elements. In this case, the `hide` class is added and removed using `classList.add()` and `classList.remove()`, respectively.

**Special JavaScript feature or syntax**

None mentioned in this specific benchmark.

**Other alternatives**

If you wanted to test alternative approaches to hiding an element, here are a few options:

* Using inline styles (`element.style.display = 'none'`) instead of setting `display` in an external stylesheet.
* Using CSS media queries to hide the element based on screen size or device orientation.
* Using JavaScript libraries like jQuery or Lodash to manage class lists and handle browser differences.

Keep in mind that each alternative approach may have its own pros and cons, and may not be suitable for all use cases.

Related benchmarks:

style.display = none vs. classList add hide Forejy (version: 0)

Comparing performance of: style.display = none vs classList add hide

Created: 4 years ago by: Registered User

Jump to the latest result

style.display = none

classList add hide

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):