escript

EsScript (often written escript) is not a single language but a name used by several different projects for lightweight, embeddable scripting facilities. Because of this, there is no universally defined specification or standard.

In general, escript implementations aim to allow applications to be extended by scripts, provide automation, or support user customization. They typically emphasize a small footprint, simple syntax, dynamic typing, and a stable API for host program integration; many provide a C or C++ API so the host can register functions and types accessible to scripts. Execution models vary; some are interpreted, others use bytecode or just-in-time compilation.

Because the name is used by different projects, the exact syntax, standard library, and tooling differ widely. Users must consult the documentation for the specific escript implementation in question, including how to embed the runtime, how to expose host functions, and how to run scripts or load modules.

See also: Lua, JavaScript (ECMAScript), embedded scripting languages.