59 lines
1.7 KiB
JavaScript
59 lines
1.7 KiB
JavaScript
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"use strict";
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exports.toDate = toDate;
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/**
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* @name toDate
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* @category Common Helpers
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* @summary Convert the given argument to an instance of Date.
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*
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* @description
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* Convert the given argument to an instance of Date.
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*
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* If the argument is an instance of Date, the function returns its clone.
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*
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* If the argument is a number, it is treated as a timestamp.
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*
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* If the argument is none of the above, the function returns Invalid Date.
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*
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* **Note**: *all* Date arguments passed to any *date-fns* function is processed by `toDate`.
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*
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* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
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*
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* @param argument - The value to convert
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*
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* @returns The parsed date in the local time zone
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*
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* @example
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* // Clone the date:
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* const result = toDate(new Date(2014, 1, 11, 11, 30, 30))
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* //=> Tue Feb 11 2014 11:30:30
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*
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* @example
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* // Convert the timestamp to date:
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* const result = toDate(1392098430000)
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* //=> Tue Feb 11 2014 11:30:30
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*/
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function toDate(argument) {
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const argStr = Object.prototype.toString.call(argument);
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// Clone the date
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if (
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argument instanceof Date ||
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(typeof argument === "object" && argStr === "[object Date]")
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) {
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// Prevent the date to lose the milliseconds when passed to new Date() in IE10
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return new argument.constructor(+argument);
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} else if (
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typeof argument === "number" ||
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argStr === "[object Number]" ||
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typeof argument === "string" ||
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argStr === "[object String]"
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) {
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// TODO: Can we get rid of as?
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return new Date(argument);
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} else {
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// TODO: Can we get rid of as?
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return new Date(NaN);
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}
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}
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