fully-typed/examples/add-numbers.js

Run time type validation, transformation, and error generator that works out of the box on primitives, objects, arrays, and nested objects. Also extensible for custom types.

/**
 *  @license
 *    Copyright 2016 Brigham Young University
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 **/
'use strict';
const Typed = require('../index');

const schema = Typed({
    type: Number,
    default: 0
});

function add(a, b) {
    a = schema.normalize(a);
    b = schema.normalize(b);
    return a + b;
}


console.log(add(1, 5));         // 6
console.log(add());             // 0

try {
    add('foo', 'bar')
} catch (err) {
    console.log(err.message);           // Invalid value. Expected a number. Received: "foo"
}