Скачать или смотреть How to Convert a String for jQuery's fadeOut

Learn how to transform CSS timing strings into milliseconds for jQuery's `fadeOut` method with our comprehensive guide.
---
This video is based on the question https://stackoverflow.com/q/64287677/ asked by the user 'David Alsbright' ( https://stackoverflow.com/u/2962427/ ) and on the answer https://stackoverflow.com/a/64288124/ provided by the user 'ikiK' ( https://stackoverflow.com/u/7158959/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Convert string to correct format for jQuery fadeOut

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Mastering jQuery fadeOut Duration with CSS Variables

When working on web projects, you may have encountered the need to utilize CSS transition timings directly in JavaScript. Specifically, if you've been using the jQuery library's fadeOut method, you might be wondering how to convert a CSS variable containing transition duration values into the appropriate format that jQuery accepts. Let's dive into this problem and explore how to solve it effectively.

The Problem Statement

You've set a CSS variable that holds different formats of transition durations, such as:

300ms

0.9s

.4s

You want to retrieve this CSS variable in JavaScript, format it correctly, and pass it as a duration to jQuery's fadeOut method. The challenge lies in converting these various formats into milliseconds, which jQuery requires to execute the fade-out effect smoothly.

Example of CSS Variable

Here's how you've defined your CSS variable in a LESS stylesheet:

[[See Video to Reveal this Text or Code Snippet]]

Accessing the CSS Variable in JavaScript

You can access your CSS variable using getComputedStyle:

[[See Video to Reveal this Text or Code Snippet]]

However, the function you've created to clean the string only handles 300ms correctly, returning 300, but struggles with .4s, which yields 3. So, how do we convert all formats into the desired milliseconds?

The Solution

To tackle this issue, follow the refined approach outlined in the getFadeSpeed function below. This function not only correctly formats the duration but also ensures the right values are passed to fadeOut.

Step-by-Step Breakdown of the Solution

Define the Function: Create a function that will handle the conversion logic.

[[See Video to Reveal this Text or Code Snippet]]

Normalize the String: Add a leading zero to handle any edge cases and trim any extra spaces.

[[See Video to Reveal this Text or Code Snippet]]

Convert to Milliseconds: Check the format and convert accordingly.

[[See Video to Reveal this Text or Code Snippet]]

Return the Final Value: Parse the final number and return it.

[[See Video to Reveal this Text or Code Snippet]]

Complete Clean Function

Here’s how the complete clean function looks like:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

With this function in place, you can confidently convert CSS timing strings into milliseconds, ensuring that your jQuery fadeOut transitions operate as expected. By handling different string formats effectively, you maintain cleaner code and improve the overall performance of your animations.

Be sure to test different scenarios, such as varying formats and lengths, to ensure robustness. Happy coding!