dayjs/plugin/timezone.js

2KB immutable date time library alternative to Moment.js with the same modern API

!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).dayjs_plugin_timezone=e()}(this,(function(){"use strict";var t={year:0,month:1,day:2,hour:3,minute:4,second:5},e={};return function(n,i,r){var o,a=function(t,n,i){void 0===i&&(i={});var r=new Date(t),o=function(t,n){void 0===n&&(n={});var i=n.timeZoneName||"short",r=t+"|"+i,o=e[r];return o||(o=new Intl.DateTimeFormat("en-US",{hour12:!1,timeZone:t,year:"numeric",month:"2-digit",day:"2-digit",hour:"2-digit",minute:"2-digit",second:"2-digit",timeZoneName:i}),e[r]=o),o}(n,i);return o.formatToParts(r)},u=function(e,n){for(var i=a(e,n),o=[],u=0;u<i.length;u+=1){var f=i[u],s=f.type,m=f.value,c=t[s];c>=0&&(o[c]=parseInt(m,10))}var l=o[3],d=24===l?0:l,h=o[0]+"-"+o[1]+"-"+o[2]+" "+d+":"+o[4]+":"+o[5]+":000",v=+e;return(r.utc(h).valueOf()-(v-=v%1e3))/6e4},f=i.prototype;f.tz=function(t,e){if(void 0===t&&(t=o),!this.isValid())return this;var n,i=this.utcOffset(),a=this.toDate(),f=a.toLocaleString("en-US",{timeZone:t}),s=u(+a,t);if(!Number(s))n=this.utcOffset(0,e);else if(n=r(f,{locale:this.$L}).$set("millisecond",this.$ms).utcOffset(s,!0),e){var m=n.utcOffset();n=n.add(i-m,"minute")}return n.$x.$timezone=t,n},f.offsetName=function(t){var e=this.$x.$timezone||r.tz.guess(),n=a(this.valueOf(),e,{timeZoneName:t}).find((function(t){return"timezonename"===t.type.toLowerCase()}));return n&&n.value};var s=f.startOf;f.startOf=function(t,e){if(!this.$x||!this.$x.$timezone)return s.call(this,t,e);var n=r(this.format("YYYY-MM-DD HH:mm:ss:SSS"),{locale:this.$L});return s.call(n,t,e).tz(this.$x.$timezone,!0)},r.tz=function(t,e,n){var i=n&&e,a=n||e||o,f=u(+r(),a);if("string"!=typeof t)return r(t).tz(a);var s=r.utc(t,i).valueOf();if(Number.isNaN(s)){var m=r(NaN);return m.$x.$timezone=a,m}var c=function(t,e,n){var i=t-60*e*1e3,r=u(i,n);if(e===r)return[i,e];var o=u(i-=60*(r-e)*1e3,n);return r===o?[i,r]:[t-60*Math.min(r,o)*1e3,Math.max(r,o)]}(s,f,a),l=c[0],d=c[1],h=r(l).utcOffset(d);return h.$x.$timezone=a,h},r.tz.guess=function(){return Intl.DateTimeFormat().resolvedOptions().timeZone},r.tz.setDefault=function(t){o=t}}}));