To Semicolon or Not to Semicolon: Best Practices in CSS and JavaScript?

Semicolon Avoidance in CSS and JavaScript

Despite the common practice of omitting the last semicolon of CSS blocks to optimize performance, there are several key considerations to keep in mind:

Good Practice in CSS

The answer is a resounding no. Manual exclusion of semicolons is discouraged due to the potential for errors and miscommunication in team environments.

Impact on Performance

While removing the final semicolon in each CSS block can theoretically save a few bytes, it's not a significant enough gain to warrant manual optimization. CSS compressors, like YUI Compressor, effectively remove these ending semicolons, providing a better solution.

Browser Compatibility

Leaving out the final semicolon in CSS is safe as browsers adhere to the CSS2 specification, which allows multiple declarations to be organized by semicolons but does not require them to terminate the declaration itself.

JavaScript Considerations

JavaScript is subject to different rules and specifications. The omission of the last semicolon in JavaScript functions has been debated extensively on platforms like Stack Overflow. It's recommended to consult the JS community for guidance on this matter.

The above is the detailed content of To Semicolon or Not to Semicolon: Best Practices in CSS and JavaScript?. For more information, please follow other related articles on the PHP Chinese website!