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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | 1x 1x 1x 1x 1x 1x 4x 1x 1x 3x 3x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 4x 1x 1x 1x 4x 4x 4x 1x | /**
* Parses ISO-8601 text to unix timestamp
* @param {string} text - ISO8601 input as string
* @returns {number} the representing ISO date as milliseconds from UNIX time on valid input, NaN on invalid input
*/
export function parseISO8601 (text) {
if (typeof text !== 'string') {
return NaN
}
const iso8601Regex =
/(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+)|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d)|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d)/
return !text.match(iso8601Regex) ? NaN : Date.parse(text)
}
/**
* Returns current time and memoizes it for the duration of a frame
*
* This function exists because many operations related to relative time
* relies on current time, calling Date.now() continuously not only returns
* different result each call, it is expensive. Calling it continuously
* will affect performance
*
* The impact of different results in Date.now() is that each frame you may,
* see inconsistent results on all ticking elements in a screen (one or two elements jumps 2 seconds,
* or no seconds at all, while others are ok)
* @returns {number} the current time, or the time of first call if called more than once during a frame
*/
export const timeNowFrame = (() => {
/** @type {number | null} */
let frameTime = null
return function timeNowFrame () {
if (frameTime === null) {
frameTime = Date.now()
requestAnimationFrame(() => { frameTime = null })
}
return frameTime
}
})()
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