Benchmark: hasAttribute with/out getAttribute

HTML Preparation code:

<div id="div1" class="">
<div id="div2" class="test">
<div id="div3">
<div id="div4" class="test">
<div id="div5" class="test test2">  
</div>
<script>
        Benchmark.prototype.setup = function() {
			const nodes = document.querySelectorAll('div');
  };
</script>

Tests:

with getAttribute
let list = []; nodes.forEach((node) => { if(node && node.hasAttribute && node.hasAttribute("class") && node.getAttribute("class")) { list.push(node); } }) console.log(list)
without getAttribute
let list = []; nodes.forEach((node) => { if(node && node.hasAttribute && node.hasAttribute("class")) { list.push(node); } }) console.log(list)
forOf (with getAttribute)
let list = []; for(const node of nodes) { if(node && node.hasAttribute && node.hasAttribute("class") && node.getAttribute("class")) { list.push(node); } } console.log(list)
forOf (without getAttribute)
let list = []; for(const node of nodes) { if(node && node.hasAttribute && node.hasAttribute("class")) { list.push(node); } } console.log(list)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
with getAttribute
without getAttribute
forOf (with getAttribute)
forOf (without getAttribute)

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 benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance difference between three different approaches for checking if an HTML element has a specific attribute: `getAttribute`, `hasAttribute` with and without the `class` attribute.

**Options Compared**

1. **with getAttribute**: This approach checks if the element has both `hasAttribute` and `getAttribute` methods available, and then calls `getAttribute` on the element to check for the presence of the `class` attribute.
2. **without getAttribute**: This approach only checks if the element has the `hasAttribute` method available, without calling it.
3. **forOf (with getAttribute)**: This approach uses a `for...of` loop to iterate over the elements, and inside the loop, it calls `hasAttribute` on each element to check for the presence of the `class` attribute.
4. **forOf (without getAttribute)**: Similar to the previous one, but without calling `hasAttribute`.

**Pros and Cons**

* **with getAttribute**: This approach is more accurate because it checks both methods. However, it's slower due to the additional method call.
* **without getAttribute**: This approach is faster but less accurate because it only checks for the presence of the `hasAttribute` method.
* **forOf (with getAttribute)** and **forOf (without getAttribute)**: These approaches are more concise and efficient, but may not be as accurate as the first two options.

**Library Used**

In this benchmark, `document.querySelectorAll` is used to select all elements on the page. This is a standard JavaScript library that allows you to query the DOM for elements using CSS selectors.

**Special JS Feature/Syntax**

None mentioned in this specific benchmark. However, it's worth noting that some modern browsers support newer JavaScript features like `for...of`, which is used in two of these options.

**Other Alternatives**

Other approaches could include:

* Using a library like jQuery to simplify the DOM manipulation and attribute checking.
* Using a different method for selecting elements, such as `document.getElementsByClassName` or `querySelectorAll` with a more specific selector.
* Adding additional checks or optimizations, such as caching the results of `hasAttribute` calls.

Overall, this benchmark provides a useful comparison of different approaches to checking if an HTML element has a specific attribute, and can help developers choose the most efficient method for their use case.

Related benchmarks:

hasAttribute with/out getAttribute (version: 1)

Comparing performance of: with getAttribute vs without getAttribute vs forOf (with getAttribute) vs forOf (without getAttribute)

Created: 3 years ago by: Registered User

Jump to the latest result

with getAttribute

without getAttribute

forOf (with getAttribute)

forOf (without getAttribute)

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):