PreciseDate

PreciseDate is an advanced extension of the JavaScript Date class, offering high-precision timekeeping capabilities. By utilizing BigInt, it precisely captures time in nanoseconds since the Unix Epoch, surpassing the limitations of standard number types. This makes it perfect for applications where time precision is critical.

Key Features

• High precision: Utilizes high-resolution real time BigInt for nanosecond accuracy, ensuring precise time measurements.
• Browser and Node.JS: From backend servers to browser-based applications, PreciseDate is universally applicable.
• Compatible with JS Date class: Allow seamless integration into existing projects.
• Compatible with JSON: Supports JSON serialization for easy data handling.
• No extra dependencies: Fully standalone, requiring no additional libraries for functionality.

Installation

npm install precisedate

Usage

Constructor Signatures

• new PreciseDate(): Initializes with current time with nanosecond precision.
• new PreciseDate("2023-11-05T00:01:02.345678901Z"): Parses an ISO string with extended precision.
• new PreciseDate(new Date()): Converts a standard Date object to PreciseDate.
• new PreciseDate(1699142462345): Initializes with a number Unix timestamp in milliseconds.
• new PreciseDate(1699142462345678901n): Initializes with a bigint Unix timestamp in nanoseconds.

Examples

Basic Usage:

preciseNow = new PreciseDate();
console.log(preciseNow.getTime()); // (bigint) 1699142462345678901n
console.log(preciseNow.toISOString()); // (string) "2023-11-05T00:01:02.345678901Z"

Parsing ISO String:

isoDate = new PreciseDate("2023-11-05T00:01:02.345678901Z");
console.log(isoDate.getMilliseconds()); // (number) 345
console.log(isoDate.getMicroseconds()); // (number) 678
console.log(isoDate.getNanoseconds()); // (number) 901

Using number Unix Timestamp in Milliseconds:

dateFromMillis = new PreciseDate(1699142462345);
console.log(dateFromMillis.toISOString());
// "2023-11-05T00:01:02.345000000Z"

Using Date object:

regularDate = new Date(1699142462345);
preciseFromDate = new PreciseDate(date);
console.log(preciseFromDate.toISOString());
// "2023-11-05T00:01:02.345000000Z"

preciseDate = new PreciseDate("2023-11-05T00:01:02.345678901Z");
regularDate = new Date(preciseDate);
console.log(regularDate.toISOString());
// "2023-11-05T00:01:02.345Z"

Using Unix Timestamp in Nanoseconds (BigInt):

dateFromNanos = new PreciseDate(BigInt("1699142462345678901"));
dateFromNanos = new PreciseDate(1699142462345678901n);
console.log(dateFromNanos.toISOString());
// "2023-11-05T00:01:02.345678901Z"

Using Unix Timestamp in Milliseconds (number):

preciseDate = new PreciseDate(1699142462345);
console.log(preciseDate.toISOString());
// "2023-11-05T00:01:02.345000000Z"

API Reference

• All standard Date methods.
• getMicroseconds(): Returns number of microseconds.
• setMicroseconds(number): Sets number of microseconds.
• getNanoseconds(): Returns number of nanoseconds.
• setNanoseconds(number): Sets number of nanoseconds.
• toISOString(): Returns string of the ISO 8601 representation. (YYYY-MM-DDTHH:mm:ss.sssssssssZ)
• getTime(): Returns BigInt with the time value in nanoseconds since the Unix Epoch.
• valueOf(): Returns the standard Unix milliseconds timestamp (number) without nanosecond precision, for compatibility purposes.

Contributing

Contributions are warmly welcomed. Please feel free to fork the repository, make changes, and submit a pull request.

License

The project is open-source and free for any use. It is licensed under the MIT License.