Microsoft JScript is designed for Web page scripting. JScript conforms to the ECMA 262 language specification. JScript is a powerful scripting language specifically targeted at the Internet. Like VBScript, JScript is an interpreted, object-based scripting language that processes source code embedded directly in HTML pages. JScript runs on both Internet Explorer and Netscape browsers.
Like VBScript, JScript talks to host applications using Windows Script Host. With Windows Script Host, browsers and other host applications do not require special integration code for each scripting component. Windows Script Host enables a host to compile scripts, obtain and call entry points, and manage the namespace available to the developer.
JScript is a loosely typed language. Loosely typed means you do not have to declare the data types of variables explicitly. In fact, you cannot explicitly declare data types in JScript. Moreover, in many cases JScript performs conversions automatically when needed. For instance, if you add a number to an item consisting of text (a string), the number is converted to text.
JScript .NET is the next generation of Microsoft's implementation of the ECMA 262 language, developed in conjunction with ECMAScript Edition 4. It is designed to run within the common language runtime to manage the execution of code and provide services that make the development process easier. With JScript .NET you get features such as cross-language integration, cross-language exception handling, enhanced security, versioning and deployment support, a simplified model for component interaction, and debugging and profiling services.
Combining the existing feature set of classic JScript (it is fully backward compatible) with the common language runtime and the best features of class-based languages, JScript .NET gives you the best of all worlds. Improvements in JScript .NET include true compiled code, typed and typeless variables, classes (with inheritance, function overloading, property accessors, and more), packages, cross-language support, and access to the .NET Framework.
Like VBScript, JScript talks to host applications using Windows Script Host. With Windows Script Host, browsers and other host applications do not require special integration code for each scripting component. Windows Script Host enables a host to compile scripts, obtain and call entry points, and manage the namespace available to the developer.
JScript is a loosely typed language. Loosely typed means you do not have to declare the data types of variables explicitly. In fact, you cannot explicitly declare data types in JScript. Moreover, in many cases JScript performs conversions automatically when needed. For instance, if you add a number to an item consisting of text (a string), the number is converted to text.
JScript .NET is the next generation of Microsoft's implementation of the ECMA 262 language, developed in conjunction with ECMAScript Edition 4. It is designed to run within the common language runtime to manage the execution of code and provide services that make the development process easier. With JScript .NET you get features such as cross-language integration, cross-language exception handling, enhanced security, versioning and deployment support, a simplified model for component interaction, and debugging and profiling services.
Combining the existing feature set of classic JScript (it is fully backward compatible) with the common language runtime and the best features of class-based languages, JScript .NET gives you the best of all worlds. Improvements in JScript .NET include true compiled code, typed and typeless variables, classes (with inheritance, function overloading, property accessors, and more), packages, cross-language support, and access to the .NET Framework.
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