TypeScript Editor allows you to write and run TypeScript code directly in the browser. TypeScript is a superset of JavaScript that adds some static typing features, the most important of which is that it allows you to specify the types of values in your programs, just like in Java, C#, and other languages that have a strong type system.

With this tool, you can write TypeScript in the same language you write JavaScript, and see the results of your code in the browser. You can also test your code in the browser, using the functionality that TypeScript provides. 

Key Features

Create projects to contain and organize your code. 

Edit the.ts file directly from the browser, or save your file to your computer for editing. 

Change the output directory for the project (if you are running in the browser, this is where the output of the files is stored).

Add source files to a project (or add multiple files to a project).

Split code into multiple files (and see their differences).

Add or remove breakpoints.

Set a new breakpoint and choose how to notify you when a breakpoint is hit.

Add functions and get information about them.