What does Baseline mean in web development?

What does it mean

Baseline is an initiative of the web.dev project, which helps developers determine when new web functionality is sufficiently supported in all major web browsers. Instead of tracking compatibility in Chrome, Safari, Firefox, or Edge separately, Baseline provides a unified way to communicate the readiness of web technologies for production deployment.

The concept was created to simplify decision-making in the development of modern web applications. Developers no longer need to analyze compatibility tables for every new CSS property or JavaScript API, but can follow the Baseline designation.

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Baseline as a Reference Standard for Modern Web Development

Web technologies are evolving very quickly. New features of HTML, CSS, or JavaScript are gradually being introduced into individual browsers, and their support may vary for several months.

That's why Baseline was created.

It is not a new web standard or technology. It is a way to easily determine whether a particular functionality is ready for safe use in most modern browsers.

The Baseline project is currently supported by major browser manufacturers, including Google Chrome, Microsoft Edge, Mozilla Firefox, and Safari.

Baseline Newly available vs. Baseline Widely available

Baseline distinguishes between two levels of support.

Baseline Newly available

The label Newly available is given to web functionality when it is available in all major browsers in their current stable versions.

This means that developers can start using it in the development of modern web applications without having to deal with different support among individual browsers.

Baseline Widely available

Approximately 30 months after receiving the Newly available label, the functionality moves to Baseline Widely available.

At this stage, it is also supported in most older versions of browsers that users still use. Such technologies are therefore suitable for projects where maximum compatibility is important.

How does Baseline help with the safe use of new web features?

Baseline significantly simplifies technological decision-making during the development of web projects.

The development team can quickly determine whether a particular functionality is suitable for production deployment or whether an alternative solution will need to be prepared when designing a frontend solution.

In practice, this brings several advantages:

• faster decision-making during development,
• less risk of compatibility issues between browsers,
• easier planning of web application modernization,
• more efficient use of new HTML, CSS, and JavaScript capabilities,
• reducing technical debt caused by supporting outdated solutions.

Baseline is also used by documentation such as MDN Web Docs, Can I Use, and web.dev itself, making it one of the most used reference systems for evaluating web technology compatibility.

Why is Baseline important in modern development?

Modern web development is not just for one browser. Every new functionality must reliably work across different platforms and devices.

Baseline helps developers make technological decisions based on the actual support of individual features, not estimates or manual compatibility comparisons.

The result is websites and applications that can use modern technologies without unnecessary risk of problems for users.