Which is more important: using TypeScript or JavaScript?

The priority of choosing between TypeScript and JavaScript depends on various factors of the project and the team. It is not possible to definitively say that one is better than the other in all situations.

TypeScript:

• Prioritized for large projects: Strict typing helps identify errors during development, increasing stability and simplifying refactoring.
• Prioritized for projects with long-term support: Types document the code, making it more understandable for new team members and easing maintenance over time.
• Prioritized for collaborative teams: Explicit type definitions prevent "unexpected" behavior and improve communication among developers.
• Prioritized for projects where reliability is important: Types reduce the likelihood of errors related to data incompatibility.

JavaScript:

• Prioritized for small projects and prototypes: Faster development due to the absence of the need for explicit type declarations.
• Prioritized for quick iteration: Allows rapid testing of ideas without compilation.
• Prioritized for projects with a short lifecycle: If the project does not require long-term support.
• Prioritized for teams with limited TypeScript experience: Requires time to learn and adapt.

Overall, for most modern frontend projects with a certain level of complexity and the need for teamwork, TypeScript is often the preferred choice due to its advantages in scalability, reliability, and support. However, JavaScript remains relevant and suitable for certain scenarios.

It is important to consider the project context, team experience, and support requirements when making a decision.