Benchmark: Set Prop Varaible vs setAttribute

HTML Preparation code:

<div id="test"></div>

Script Preparation code:

element = document.getElementById("test");

Tests:

style.setProperty
let i = 0; while (i < 10000) { element.style.setProperty("--myVar", "blue"); i++; }
style.cssText
let i = 0; while (i < 10000) { element.setAttribute("style", "--myVar: blue"); i++; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style.setProperty
style.cssText

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Windows

View result in a separate tab

Test name	Executions per second
style.setProperty	226.5 Ops/sec
style.cssText	882.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested, along with the pros and cons of each approach.

**Benchmark Overview**

The benchmark compares two ways to set CSS styles on an HTML element:

1. Using `style.setProperty` (Test Case 1)
2. Using `element.setAttribute("style", "...")` (Test Case 2)

**Options Compared**

* **`style.setProperty`**: This method sets a CSS property named `--myVar` with the value `blue`. It's a more modern and efficient way to set CSS styles, as it allows for more precise control over the property name and value.
* **`element.setAttribute("style", "...")`**: This method sets the `style` attribute of an HTML element to a string containing the desired CSS properties. The format is `property: value`, with multiple properties separated by semicolons.

**Pros and Cons**

* **`style.setProperty`**:
	+ Pros:
		- More efficient, as it avoids the overhead of parsing and serializing the `style` attribute.
		- Allows for more precise control over property names and values.
	+ Cons:
		- Not supported in older browsers (e.g., Internet Explorer).
* **`element.setAttribute("style", "...")`**:
	+ Pros:
		- Supported by all modern browsers, including older ones.
	+ Cons:
		- Less efficient, as it involves parsing and serializing the `style` attribute.

**Library/Utility**

None mentioned in this benchmark.

**Special JS Feature/Syntax**

* No special JavaScript features or syntax are used in these test cases. They only rely on standard JavaScript and DOM APIs.

**Other Considerations**

When choosing between these two approaches, consider the trade-offs:

* If you need to support older browsers, use `element.setAttribute("style", "...")`. This will ensure compatibility, but may impact performance.
* If you're targeting modern browsers and prioritize performance, use `style.setProperty`. This method is more efficient and allows for better control over CSS styles.

**Alternatives**

If you want to explore alternative approaches, consider:

* **`element.style`**: Setting CSS properties directly on the `style` property of an element. While it's supported by all modern browsers, it may not be as efficient as `style.setProperty`.
* **CSS classes**: Using CSS classes to apply styles to elements. This approach is more flexible and reusable than setting individual styles on elements.

Keep in mind that each approach has its own pros and cons, and the best choice depends on your specific use case, browser requirements, and performance considerations.

Related benchmarks:

Set Prop Varaible vs setAttribute (version: 0)

Comparing performance of: style.setProperty vs style.cssText

Created: 2 years ago by: Guest

Jump to the latest result

style.setProperty

style.cssText

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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