Scope Example

This example demonstrates the use of the scope parameter as passed to the reply() function.

The purpose of the scope parameter is to change the scope that a JS macro executes in. Put more simply, it changes the meaning of the built-in variable named this to point to the same this as in the parent object.

In the example code, the RiveScript bot instance is encapsulated as a member attribute of the ScopedBot object. By passing in the this variable to the RiveScript reply() function, the JS object macro is also executed in the context of the ScopedBot instance, and therefore it can access other local instance variables and functions.

Example Output

% node bot.js
Bot> Testing the scope!
Function result: It works!
this.hello: Hello world
this.counter: 1
> scope test
Bot> Testing the scope!
Function result: It works!
this.hello: Hello world
this.counter: 2
> scope test
Bot> Testing the scope!
Function result: It works!
this.hello: Hello world
this.counter: 3