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offsetWidth vs closest
(version: 0)
Comparing performance of:
closest vs offsetwidth vs hidden vs offsetWidth && offsetHeight
Created:
4 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div id="teste">teste</div>
Script Preparation code:
var teste_n = '123px'; var _style = window.getComputedStyle(document.getElementById('teste'));
Tests:
closest
document.getElementById('teste').closest('[hidden]');
offsetwidth
document.getElementById('teste').offsetwidth;
hidden
document.getElementById('teste').hidden;
offsetWidth && offsetHeight
let teste = document.getElementById('teste'); teste.offsetWidth && teste.offsetHeight;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
closest
offsetwidth
hidden
offsetWidth && offsetHeight
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its various components. **Benchmark Definition JSON** The provided JSON represents a JavaScript microbenchmark that compares different approaches to retrieve properties from an HTML element. **Script Preparation Code** This section of code is executed once, before running each test. It: 1. Assigns a string value `'123px'` to the variable `teste_n`. 2. Retrieves the computed style of the HTML element with the id `teste` using the `window.getComputedStyle()` function and stores it in the variable `_style`. **Html Preparation Code** This section of code is executed once, before running each test. It creates a simple HTML structure: ```html <div id="teste">teste</div> ``` This div will be used to store the test element. **Individual Test Cases** The benchmark consists of four test cases: 1. `closest`: Retrieves the closest ancestor with the `hidden` pseudo-class using the `closest()` method. 2. `offsetwidth`: Retrieves the offset width property using the `.offsetWidth` property (note: there is a typo in the original code, it should be `.offsetWidth`, not `.offsetwidth`). 3. `hidden`: Retrieves the value of the `hidden` pseudo-class directly using the `.hidden` property. 4. `offsetWidth && offsetHeight`: Verifies that the test element has both an offset width and height using a conditional statement. **Library Usage** None of these tests explicitly use a JavaScript library, but some modern browsers may utilize internal libraries or APIs to implement these methods (e.g., `closest()` is often implemented in terms of querySelectorAll(), while `.offsetWidth` and `.hidden` are part of the DOM API). **Special JS Feature or Syntax** There is no special JS feature or syntax used in this benchmark. **Other Considerations** These tests can be seen as examples of: * Property access: `offsetWidth`, `.offsetWidth` * Pseudo-classes: `hidden`, `[hidden]` * Ancestor selection: `closest` In terms of optimization, these tests aim to measure the performance differences between: * Retrieving a property directly (e.g., `.offsetWidth`) * Using a method to retrieve a property (e.g., `offsetWidth`) * Verifying multiple properties simultaneously (e.g., `offsetWidth && offsetHeight`) **Alternative Approaches** Some alternative approaches could be explored, such as: * Using `getComputedStyle()` instead of `window.getComputedStyle()` * Utilizing ` CSSOMView` or similar APIs for optimized style access * Implementing custom solutions using JavaScript's built-in functions and data structures However, these alternatives may not necessarily provide significant performance improvements over the existing implementation. **Benchmarking Insights** The provided benchmark results show that: * The `closest()` method is slower than retrieving properties directly (`.offsetWidth`). * Retrieving `hidden` pseudo-classes using `.hidden` is faster than relying on `[hidden]`. * Verifying multiple properties simultaneously (`offsetWidth && offsetHeight`) does not provide significant performance gains compared to separate property accesses.
Related benchmarks:
clientWidth vs offsetWidth vs window.getComputedStyle
clientWidth vs offsetWidth vs window.getComputedStyle vs getBoundingClientRect
clientWidth vs offsetWidth vs window.getComputedStyle v2
clientWidth vs offsetWidth vs scrollWidth
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