Uncaught TypeError

[leyaannie]

when i'm trying to add this code in my project Uncaught TypeError: this.refs.name.getDOMNode is not a function this error is occured in
var data = {
name : this.refs.name.getDOMNode().value, - this line
password : this.refs.password.getDOMNode().value,
email : this.refs.email.getDOMNode().value,
}
What will I do to change this error?