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setProperty vs style vs cssText
(version: 0)
Comparing performance of:
setProperty vs style vs cssText
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<div id="foo"></div>
Tests:
setProperty
var element = document.getElementById("foo"); var i = 10000; while (i--) { element.style.setProperty('transition', "none; transform:scale(1.05)"); element.style.setProperty('transform', "scale(1.05)"); element.style.setProperty('transition', ""); element.style.setProperty('transform', ""); }
style
var element = document.getElementById("foo"); var i = 10000; while (i--) { element.style.transition = "none"; element.style.transform = "scale(1.05)"; element.style.transition = ""; element.style.transform = ""; }
cssText
var element = document.getElementById("foo"); var i = 10000; while (i--) { element.style.cssText = "transition:none; transform:scale(1.05)"; element.style.cssText = ""; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
setProperty
style
cssText
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview** The provided JSON represents a JavaScript microbenchmark test on MeasureThat.net, comparing three approaches to set transition and transform styles for an HTML element. **Benchmark Definition** The benchmark definition specifies the test scenario: * Create an HTML element with `id="foo"` using `document.getElementById`. * Set `i` to 10,000. * Use a while loop to iterate 10,000 times. * In each iteration, set the transition and transform styles for the element. **Test Cases** There are three test cases: 1. **setProperty**: Sets the transition style using `element.style.setProperty('transition', "none; transform:scale(1.05)");` and then clears it. Then, sets the transform style using `element.style.setProperty('transform', "scale(1.05)");` and clears it. 2. **style**: Sets the transition style using `element.style.transition = "none";` and then clears it. Then, sets the transform style using `element.style.transform = "scale(1.05)";` and clears it. 3. **cssText**: Sets the transition and transform styles using a single string assignment to the `element.style.cssText` property. **Options Compared** The three test cases compare: * Setting styles using `setProperty`, `style`, and `cssText`. * The impact of clearing the style assignments on performance. **Pros and Cons** * **setProperty**: + Pros: Can set multiple styles in a single call, allows for easy modification of individual styles. + Cons: Requires more calls to clear styles, may lead to slower performance due to additional DOM manipulations. * **style**: + Pros: Simplifies style assignments by providing a single method to set and clear properties. + Cons: May require additional calls to clear individual styles, can be slower due to repeated DOM manipulations. * **cssText**: + Pros: Sets multiple styles in a single string assignment, easy to modify individual styles using CSS syntax. + Cons: Limited control over style manipulation, may lead to slower performance due to parsing and executing CSS strings. **Library Used** None of the test cases use any external libraries. The benchmark focuses on comparing native JavaScript methods for setting styles. **Special JS Feature/Syntax** The `cssText` property is a special JavaScript feature that allows setting multiple styles in a single string assignment, using CSS syntax. **Other Considerations** * **DOM Manipulation**: All three test cases involve DOM manipulation (setting and clearing styles), which can be slow. * **Browser Variance**: The benchmark measures the performance of each approach on different browsers and devices, providing insights into potential browser-specific issues. * **Optimization Opportunities**: The results may indicate opportunities for optimization, such as reducing the number of style assignments or using more efficient methods for setting styles. **Alternatives** Other alternatives to consider when setting styles include: * Using CSS classes or inline styles * Utilizing the `CSS` API (for modern browsers) * Leveraging frameworks like React or Angular, which often provide optimized methods for updating component styles
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setProperty vs .cssPropertyName
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