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What Is JScript?

JScript is Microsoft's implementation of the ECMA-262 specification. ECMA (European Computer Manufacturers Association) is a European group that develops standards for technologies ranging from electronics to script languages. ECMAScript is the language standardized in the ECMA-262 specification, which was originally based on Netscape JavaScript1.1 and JScript 2.0. JavaScript 1.5 is also compliant with the ECMA-262 specification. JScript is a complete implementation of the ECMA-262 standard with a few additional features to support Microsoft Windows more fully, such as the capability to call COM objects.

NOTE
Like VBScript, JScript is an interpreted language—you need only the source code in a .js file to execute a script in WSH. Like C++, JScript is object-oriented.