- 授权协议: MIT
- 开发语言: Google Go
- 操作系统: 跨平台
- 软件首页: https://godoc.org/github.com/robertkrimen/otto
- 软件文档: https://godoc.org/github.com/robertkrimen/otto
- 官方下载: https://github.com/robertkrimen/otto
软件介绍
otto 是 用原生 Go 编写的 JavaScript 解析器和解释器。
import ( "github.com/robertkrimen/otto" )
在 VM 中运行
vm := otto.New()
vm.Run(`
abc = 2 + 2;
console.log("The value of abc is " + abc); // 4
`)获取 VM 外的值
if value, err := vm.Get("abc"); err == nil {
if value_int, err := value.ToInteger(); err == nil {
fmt.Printf("", value_int, err)
}
}设置数字
vm.Set("def", 11)
vm.Run(`
console.log("The value of def is " + def);
// The value of def is 11
`)设置字符串
vm.Set("xyzzy", "Nothing happens.")
vm.Run(`
console.log(xyzzy.length); // 16
`)获取表达式的值
value, _ = vm.Run("xyzzy.length")
{
// value is an int64 with a value of 16
value, _ := value.ToInteger()
}抛出错误
value, err = vm.Run("abcdefghijlmnopqrstuvwxyz.length")
if err != nil {
// err = ReferenceError: abcdefghijlmnopqrstuvwxyz is not defined
// If there is an error, then value.IsUndefined() is true
...
}设置 Go 函数
vm.Set("sayHello", func(call otto.FunctionCall) otto.Value {
fmt.Printf("Hello, %s.\n", call.Argument(0).String())
return otto.Value{}
})在 JS 中使用函数
result, _ = vm.Run(`
sayHello("Xyzzy"); // Hello, Xyzzy.
sayHello(); // Hello, undefined
result = twoPlus(2.0); // 4
`)
