Programming languages · Comparison
JavaScript vs TypeScript
TypeScript is JavaScript with a type checker on top, so this is less a choice between languages than a choice of how much the tools check for you before the code runs.
2 options · 8 questions side by side · updated
| Compare | JavaScript | TypeScript |
|---|---|---|
| What it is | The language browsers run | JavaScript plus types, compiled to JavaScript |
| Types | Dynamic, checked as the code runs | Static, checked before the code runs |
| Setup | None, runs as written | A compiler or a tool that strips types |
| Mistakes caught | At run time, sometimes by users | In the editor and at build time |
| Editor help | Autocomplete based on guesses | Precise autocomplete and safe renames |
| Learning curve | Gentler start | More to learn: types, generics, config |
| Runs in the browser | Directly | After the types are removed |
| Best for | Small scripts and quick experiments | Apps that grow and code shared by a team |
How to choose between JavaScript and TypeScript
- Pick JavaScript for small scripts, quick experiments and pages with a little interactivity.
- Pick TypeScript for anything that will grow, be shared by a team or be maintained for years.
- TypeScript accepts plain JavaScript, so a project can move over one file at a time.
The options
- JavaScriptThe programming language built into every web browser, used to make pages interactive and, through Node.js and similar runtimes, to run servers too.
- TypeScriptJavaScript with types added, so the editor can catch mistakes such as a misspelt field or a missing value before the code ever runs.
More comparisons
- Kotlin vs JavaBoth run on the JVM, share libraries and can live in the same project. Kotlin is the newer, more concise option that Google recommends for Android; Java is the long-established standard for enterprise backends.
- Python vs JavaScriptTwo of the most common first languages. Both are easy to start with and dynamically typed; they differ mostly in where they run and what their ecosystems are built for.
- Rust vs Go vs C++Three compiled languages for fast, low-level or infrastructure code. They make different trade-offs between raw speed, safety and how easy the code is to write and read.
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