charlike/templates/node_modules/es5-ext/date/valid-date.js

Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options

'use strict';

var isDate = require('./is-date');

module.exports = function (x) {
	if (!isDate(x) || isNaN(x)) throw new TypeError(x + " is not valid Date object");
	return x;
};