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35 lines
865 B
35 lines
865 B
var isDate = require('../is_date/index.js') |
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/** |
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* @category Common Helpers |
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* @summary Is the given date valid? |
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* |
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* @description |
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* Returns false if argument is Invalid Date and true otherwise. |
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* Invalid Date is a Date, whose time value is NaN. |
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* |
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* Time value of Date: http://es5.github.io/#x15.9.1.1 |
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* |
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* @param {Date} date - the date to check |
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* @returns {Boolean} the date is valid |
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* @throws {TypeError} argument must be an instance of Date |
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* |
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* @example |
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* // For the valid date: |
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* var result = isValid(new Date(2014, 1, 31)) |
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* //=> true |
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* |
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* @example |
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* // For the invalid date: |
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* var result = isValid(new Date('')) |
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* //=> false |
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*/ |
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function isValid (dirtyDate) { |
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if (isDate(dirtyDate)) { |
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return !isNaN(dirtyDate) |
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} else { |
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throw new TypeError(toString.call(dirtyDate) + ' is not an instance of Date') |
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} |
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} |
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module.exports = isValid
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