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className vs classList for a new element
(version: 0)
Comparing performance of:
className vs classList
Created:
2 years ago
by:
Guest
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Tests:
className
for (let i = 0; i < 1000; i++) { const div = document.createElement('div'); div.className = 'div'; }
classList
for (let i = 0; i < 1000; i++) { const div = document.createElement('div'); div.classList.add('div'); }
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Suite status:
<idle, ready to run>
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Test case name
Result
className
classList
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N/A
Slowest:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark being tested. **What is being tested?** The provided JSON represents a JavaScript microbenchmark that tests the performance difference between two approaches: using the `className` property and using the `classList` API to set a class name for an HTML element. **Options compared** There are two options being compared: 1. **className**: This approach involves setting the `className` property of the `div` element directly. 2. **classList**: This approach involves adding a class name to the `classList` property of the `div` element using the `add()` method. **Pros and Cons** Here are some pros and cons of each approach: * **className**: + Pros: Simple, straightforward, and widely supported. + Cons: May not provide accurate results if multiple classes need to be added or removed from an element. * **classList**: + Pros: Provides more flexibility and control over class management (e.g., adding, removing, testing), especially when dealing with complex CSS rules. + Cons: May introduce overhead due to the additional API call. **Library/Feature used** In this benchmark, no specific library or JavaScript feature is being tested. The focus is on the basic properties of HTML elements and how they can be manipulated in JavaScript. **Other considerations** It's worth noting that the choice between `className` and `classList` ultimately depends on the specific use case and requirements of the project. For simple cases, using `className` might be sufficient. However, when dealing with more complex class management scenarios or when working with CSS rules, using `classList` can provide more flexibility and control. **Alternatives** Some alternative approaches for setting a class name on an HTML element include: 1. **innerHTML**: Setting the innerHTML property of an element directly. While this approach might seem simple, it's not recommended due to security concerns and potential performance issues. 2. **style**: Setting the `style` attribute of an element using string concatenation or interpolation. This approach can be fragile and prone to errors. Overall, the benchmark provided by MeasureThat.net offers a straightforward way to compare the performance of different approaches for setting class names on HTML elements, allowing developers to make informed decisions about their coding choices.
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