package otto
import (
"fmt"
)
func ExampleSynopsis() {
vm := New()
vm.Run(`
abc = 2 + 2;
console.log("The value of abc is " + abc); // 4
`)
value, _ := vm.Get("abc")
{
value, _ := value.ToInteger()
fmt.Println(value)
}
vm.Set("def", 11)
vm.Run(`
console.log("The value of def is " + def);
`)
vm.Set("xyzzy", "Nothing happens.")
vm.Run(`
console.log(xyzzy.length);
`)
value, _ = vm.Run("xyzzy.length")
{
value, _ := value.ToInteger()
fmt.Println(value)
}
value, err := vm.Run("abcdefghijlmnopqrstuvwxyz.length")
fmt.Println(value)
fmt.Println(err)
vm.Set("sayHello", func(call FunctionCall) Value {
fmt.Printf("Hello, %s.\n", call.Argument(0).String())
return UndefinedValue()
})
vm.Set("twoPlus", func(call FunctionCall) Value {
right, _ := call.Argument(0).ToInteger()
result, _ := vm.ToValue(2 + right)
return result
})
value, _ = vm.Run(`
sayHello("Xyzzy");
sayHello();
result = twoPlus(2.0);
`)
fmt.Println(value)
// Output:
// The value of abc is 4
// 4
// The value of def is 11
// 16
// 16
// undefined
// ReferenceError: abcdefghijlmnopqrstuvwxyz is not defined
// Hello, Xyzzy.
// Hello, undefined.
// 4
}
func ExampleConsole() {
vm := New()
console := map[string]interface{}{
"log": func(call FunctionCall) Value {
fmt.Println("console.log:", formatForConsole(call.ArgumentList))
return UndefinedValue()
},
}
err := vm.Set("console", console)
value, err := vm.Run(`
console.log("Hello, World.");
`)
fmt.Println(value)
fmt.Println(err)
// Output:
// console.log: Hello, World.
// undefined
// <nil>
}
