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Version: 3.35.1

Date.prototype.toLocaleTimeString()

The toLocaleTimeString() method returns a string with a language-sensitive representation of the time portion of the date. In implementations with Intl.DateTimeFormat API support, this method simply calls Intl.DateTimeFormat.

Syntax​

toLocaleTimeString()
toLocaleTimeString(locales)
toLocaleTimeString(locales, options)

Parameters​

The locales and options arguments customize the behavior of the function and let applications specify the language whose formatting conventions should be used.

In implementations that support the Intl.DateTimeFormat API, these parameters correspond exactly to the Intl.DateTimeFormat() constructor's parameters. Implementations without Intl.DateTimeFormat support are asked to ignore both parameters, making the locale used and the form of the string returned entirely implementation-dependent.

  • locales optional

    • : A string with a BCP 47 language tag, or an array of such strings. Corresponds to the locales parameter of the Intl.DateTimeFormat() constructor.

      In implementations without Intl.DateTimeFormat support, this parameter is ignored and the host's locale is usually used.

  • options optional

    • : An object adjusting the output format. Corresponds to the options parameter of the Intl.DateTimeFormat() constructor. If dayPeriod, hour, minute, second, and fractionalSecondDigits are all undefined, then hour, minute, second will be set to "numeric".

      In implementations without Intl.DateTimeFormat support, this parameter is ignored.

See the Intl.DateTimeFormat() constructor for details on these parameters and how to use them.

Return value​

A string representing the time portion of the given Date instance according to language-specific conventions.

In implementations with Intl.DateTimeFormat, this is equivalent to new Intl.DateTimeFormat(locales, options).format(date), where options has been normalized as described above.

Performance​

When formatting large numbers of dates, it is better to create an Intl.DateTimeFormat object and use its format() method.