Benchmark: Mix jquery & vanilla

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Script Preparation code:

var $dragContainer = $("<div/>", { id: 'drag_img' })

Tests:

mix
if (!$dragContainer[0].hasChildNodes()) { console.log(1) }
jquery
if (!$dragContainer.children().length) { console.log(1) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
mix
jquery

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.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition and Script Preparation Code**

The benchmark definition represents a script that will be executed repeatedly to measure its performance. In this case, the script preparation code is:
```javascript
var $dragContainer = $( `<div/>`, { id: 'drag_img' } );
```
This code creates an empty `div` element with an ID of `'drag_img'`. The `$` symbol is a reference to jQuery's global object. This line of code sets up the test environment by defining a variable `$dragContainer` that will be used in the benchmark definition.

**Html Preparation Code**

The html preparation code:
```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
```
includes a reference to jQuery's CDN, which means that the browser will load jQuery from this URL instead of using its local copy.

**Test Cases and Benchmark Definitions**

There are two individual test cases in this benchmark:

### Test Case 1: "mix"

The benchmark definition for this test case is:
```javascript
if (!$dragContainer[0].hasChildNodes()) {
    console.log(1);
}
```
This line of code checks if the `div` element created earlier has any child nodes. If it doesn't, it logs a value of 1 to the console.

### Test Case 2: "jquery"

The benchmark definition for this test case is:
```javascript
if (!$dragContainer.children().length) {
    console.log(1);
}
```
This line of code checks if the `div` element created earlier has any child elements. If it doesn't, it logs a value of 1 to the console.

**Library and Its Purpose**

In both test cases, jQuery is used as a library to interact with the HTML document. The `$dragContainer.children()` method returns an array-like object containing all child elements of the `div` element, while the `.hasChildNodes()` method checks if the element has any child nodes (including text nodes).

**Pros and Cons**

* **Using `hasChildNodes()`**: This approach is straightforward and easy to understand. However, it may be slower than using a more efficient method like `$dragContainer.children().length`.
* **Using `$dragContainer.children().length`**: This approach is generally faster because it directly checks the length of the child element array without iterating through its contents.

**Other Considerations**

* **DOM Manipulation**: Both test cases involve manipulating the DOM to create and check the presence of a `div` element. This can have performance implications if not done efficiently.
* **Browser Variability**: The benchmark results may vary depending on the browser used, as different browsers may optimize or handle DOM manipulation differently.

**Special JavaScript Features or Syntax**

There are no special JavaScript features or syntax mentioned in this benchmark definition.

Related benchmarks:

Mix jquery & vanilla (version: 0)

Comparing performance of: mix vs jquery

Created: 2 years ago by: Guest

Jump to the latest result

mix

jquery

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):