Servo Boolean Observable

boolean.js

goog.provide('servo.boolean');

goog.require('servo.observable');

servo.boolean = function (value, options) {
  return servo.observable(value, function (value) {
    return typeof value === 'boolean';
  }, options);
};

string.js

goog.provide('servo.string');

goog.require('servo.observable');

servo.string = function (value, options) {
  return servo.observable(value, function (value) {
    return typeof value === 'string';
  }, options);
};

Example Usage:

var default, nullable;

default = servo.boolean(true);
nullable = servo.boolean(null, { nullable: true });