diff --git a/__tests__/utils/date.spec.ts b/__tests__/utils/date.spec.ts
index 93ad7a8..1ca762f 100644
--- a/__tests__/utils/date.spec.ts
+++ b/__tests__/utils/date.spec.ts
@@ -3,19 +3,19 @@
  * Contract: i@hust.cc
  */
 
-import { toTimestamp, formatDiff, diffSec, nextInterval } from '../../src/utils/date';
+import { toDate, formatDiff, diffSec, nextInterval } from '../../src/utils/date';
 
 import { getLocale } from '../../src/locales';
 
 describe('date', () => {
   test('toTimestamp', () => {
-    expect(typeof toTimestamp('1992-08-01')).toBe('number');
-    expect(typeof toTimestamp(712627200000)).toBe('number');
+    expect(toDate('1992-08-01')).toBeInstanceOf(Date);
+    expect(toDate(712627200000)).toBeInstanceOf(Date);
 
-    expect(typeof toTimestamp('2017-2-5 3:57:52UTC')).toBe('number');
-    expect(typeof toTimestamp('2017-2-5T3:57:52Z')).toBe('number');
+    expect(toDate('2017-2-5 3:57:52UTC')).toBeInstanceOf(Date);
+    expect(toDate('2017-2-5T3:57:52Z')).toBeInstanceOf(Date);
 
-    expect(typeof toTimestamp()).toBe('number');
+    expect(toDate()).toBeInstanceOf(Date);
   });
 
   test('diffSec', () => {
diff --git a/gh-pages/timeago.full.min.js b/gh-pages/timeago.full.min.js
index 8f65019..2369137 100644
--- a/gh-pages/timeago.full.min.js
+++ b/gh-pages/timeago.full.min.js
@@ -1 +1 @@
-!function(s,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n((s=s||self).timeago={})}(this,function(s){"use strict";var o=[60,60,24,7,365/7/12,12];function e(s){return s instanceof Date?+s:!isNaN(s)||/^\d+$/.test(s)?+new Date(parseInt(s)):(s=(s||"").trim().replace(/\.\d+/,"").replace(/-/,"/").replace(/-/,"/").replace(/(\d)T(\d)/,"$1 $2").replace(/Z/," UTC").replace(/([+-]\d\d):?(\d\d)/," $1$2"),+new Date(s))}function m(s,n){for(var e=s<0?1:0,a=s=Math.abs(s),t=0;s>=o[t]&&t<o.length;t++)s/=o[t];return(0===(t*=2)?9:1)<(s=~~s)&&(t+=1),n(s,t,a)[e].replace("%s",s)}function d(s,n){return((n=n?e(n):+new Date)-e(s))/1e3}var a=["second","minute","hour","day","week","month","year"];function n(s,n){if(0===n)return["just now","right now"];var e=a[~~(n/2)];return 1<s&&(e+="s"),[s+" "+e+" ago","in "+s+" "+e]}var t=["秒","分钟","小时","天","周","个月","年"];function u(s,n){if(0===n)return["刚刚","片刻后"];var e=t[~~(n/2)];return[s+" "+e+"前",s+" "+e+"后"]}function r(s,n){c[s]=n}function i(s){return c[s]||n}var c={en_US:n,zh_CN:u},l="timeago-tid",h="datetime";function g(s){return~~s.getAttribute(l)}var f={},p=function(s){clearTimeout(s),delete f[s]};function b(s,n,e,a){p(g(s));var t=a.relativeDate,u=a.minInterval,r=d(n,t);s.innerText=m(r,e);var i=setTimeout(function(){b(s,n,e,a)},Math.min(1e3*Math.max(function(s){for(var n=1,e=0,a=Math.abs(s);s>=o[e]&&e<o.length;e++)s/=o[e],n*=o[e];return~~(a=(a%=n)?n-a:n)}(r),u||1),2147483647));f[i]=0,function(s,n){s.setAttribute(l,n)}(s,i)}var v=[["ثانية","ثانيتين","%s ثوان","%s ثانية"],["دقيقة","دقيقتين","%s دقائق","%s دقيقة"],["ساعة","ساعتين","%s ساعات","%s ساعة"],["يوم","يومين","%s أيام","%s يوماً"],["أسبوع","أسبوعين","%s أسابيع","%s أسبوعاً"],["شهر","شهرين","%s أشهر","%s شهراً"],["عام","عامين","%s أعوام","%s عاماً"]];function y(s,n,e,a,t){var u=t%10,r=a;return 1===t?r=s:1==u&&20<t?r=n:1<u&&u<5&&(20<t||t<10)&&(r=e),r}var k=y.bind(null,"секунду","%s секунду","%s секунды","%s секунд"),j=y.bind(null,"хвіліну","%s хвіліну","%s хвіліны","%s хвілін"),z=y.bind(null,"гадзіну","%s гадзіну","%s гадзіны","%s гадзін"),w=y.bind(null,"дзень","%s дзень","%s дні","%s дзён"),_=y.bind(null,"тыдзень","%s тыдзень","%s тыдні","%s тыдняў"),q=y.bind(null,"месяц","%s месяц","%s месяцы","%s месяцаў"),M=y.bind(null,"год","%s год","%s гады","%s гадоў");function T(s){var n=["۰","۱","۲","۳","۴","۵","۶","۷","۸","۹"];return s.toString().replace(/\d/g,function(s){return n[s]})}var S=[["w tej chwili","za chwilę"],["%s sekund temu","za %s sekund"],["1 minutę temu","za 1 minutę"],["%s minut temu","za %s minut"],["1 godzinę temu","za 1 godzinę"],["%s godzin temu","za %s godzin"],["1 dzień temu","za 1 dzień"],["%s dni temu","za %s dni"],["1 tydzień temu","za 1 tydzień"],["%s tygodni temu","za %s tygodni"],["1 miesiąc temu","za 1 miesiąc"],["%s miesięcy temu","za %s miesięcy"],["1 rok temu","za 1 rok"],["%s lat temu","za %s lat"],["%s sekundy temu","za %s sekundy"],["%s minuty temu","za %s minuty"],["%s godziny temu","za %s godziny"],["%s dni temu","za %s dni"],["%s tygodnie temu","za %s tygodnie"],["%s miesiące temu","za %s miesiące"],["%s lata temu","za %s lata"]];function N(s,n,e,a,t){var u=t%10,r=a;return 1===t?r=s:1==u&&20<t?r=n:1<u&&u<5&&(20<t||t<10)&&(r=e),r}var x=N.bind(null,"секунду","%s секунду","%s секунды","%s секунд"),D=N.bind(null,"минуту","%s минуту","%s минуты","%s минут"),O=N.bind(null,"час","%s час","%s часа","%s часов"),W=N.bind(null,"день","%s день","%s дня","%s дней"),I=N.bind(null,"неделю","%s неделю","%s недели","%s недель"),$=N.bind(null,"месяц","%s месяц","%s месяца","%s месяцев"),J=N.bind(null,"год","%s год","%s года","%s лет");function A(s,n,e,a,t){var u=t%10,r=t%100;return 1==t?s:1==u&&11!=r?n:2<=u&&u<=4&&!(12<=r&&r<=14)?e:a}var C=A.bind(null,"1 секунд","%s секунд","%s секунде","%s секунди"),E=A.bind(null,"1 минут","%s минут","%s минуте","%s минута"),U=A.bind(null,"сат времена","%s сат","%s сата","%s сати"),B=A.bind(null,"1 дан","%s дан","%s дана","%s дана"),P=A.bind(null,"недељу дана","%s недељу","%s недеље","%s недеља"),R=A.bind(null,"месец дана","%s месец","%s месеца","%s месеци"),Z=A.bind(null,"годину дана","%s годину","%s године","%s година");function F(s,n,e,a,t){var u=t%10,r=a;return 1===t?r=s:1==u&&20<t?r=n:1<u&&u<5&&(20<t||t<10)&&(r=e),r}var G=F.bind(null,"секунду","%s секунду","%s секунди","%s секунд"),H=F.bind(null,"хвилину","%s хвилину","%s хвилини","%s хвилин"),K=F.bind(null,"годину","%s годину","%s години","%s годин"),L=F.bind(null,"день","%s день","%s дні","%s днів"),Q=F.bind(null,"тиждень","%s тиждень","%s тиждні","%s тижднів"),V=F.bind(null,"місяць","%s місяць","%s місяці","%s місяців"),X=F.bind(null,"рік","%s рік","%s роки","%s років");var Y=Object.freeze({__proto__:null,ar:function(s,n){if(0===n)return["منذ لحظات","بعد لحظات"];var e=function(s,n){return n<3?v[s][n-1]:3<=n&&n<=10?v[s][2]:v[s][3]}(Math.floor(n/2),s);return["منذ "+e,"بعد "+e]},be:function(s,n){switch(n){case 0:return["толькі што","праз некалькі секунд"];case 1:return[k(s)+" таму","праз "+k(s)];case 2:case 3:return[j(s)+" таму","праз "+j(s)];case 4:case 5:return[z(s)+" таму","праз "+z(s)];case 6:case 7:return[w(s)+" таму","праз "+w(s)];case 8:case 9:return[_(s)+" таму","праз "+_(s)];case 10:case 11:return[q(s)+" таму","праз "+q(s)];case 12:case 13:return[M(s)+" таму","праз "+M(s)];default:return["",""]}},bg:function(s,n){return[["току що","съвсем скоро"],["преди %s секунди","след %s секунди"],["преди 1 минута","след 1 минута"],["преди %s минути","след %s минути"],["преди 1 час","след 1 час"],["преди %s часа","след %s часа"],["преди 1 ден","след 1 ден"],["преди %s дни","след %s дни"],["преди 1 седмица","след 1 седмица"],["преди %s седмици","след %s седмици"],["преди 1 месец","след 1 месец"],["преди %s месеца","след %s месеца"],["преди 1 година","след 1 година"],["преди %s години","след %s години"]][n]},bn_IN:function(s,n){return[["এইমাত্র","একটা সময়"],["%s সেকেন্ড আগে","%s এর সেকেন্ডের মধ্যে"],["1 মিনিট আগে","1 মিনিটে"],["%s এর মিনিট আগে","%s এর মিনিটের মধ্যে"],["1 ঘন্টা আগে","1 ঘন্টা"],["%s ঘণ্টা আগে","%s এর ঘন্টার মধ্যে"],["1 দিন আগে","1 দিনের মধ্যে"],["%s এর দিন আগে","%s এর দিন"],["1 সপ্তাহ আগে","1 সপ্তাহের মধ্যে"],["%s এর সপ্তাহ আগে","%s সপ্তাহের মধ্যে"],["1 মাস আগে","1 মাসে"],["%s মাস আগে","%s মাসে"],["1 বছর আগে","1 বছরের মধ্যে"],["%s বছর আগে","%s বছরে"]][n]},ca:function(s,n){return[["fa un moment","d'aquí un moment"],["fa %s segons","d'aquí %s segons"],["fa 1 minut","d'aquí 1 minut"],["fa %s minuts","d'aquí %s minuts"],["fa 1 hora","d'aquí 1 hora"],["fa %s hores","d'aquí %s hores"],["fa 1 dia","d'aquí 1 dia"],["fa %s dies","d'aquí %s dies"],["fa 1 setmana","d'aquí 1 setmana"],["fa %s setmanes","d'aquí %s setmanes"],["fa 1 mes","d'aquí 1 mes"],["fa %s mesos","d'aquí %s mesos"],["fa 1 any","d'aquí 1 any"],["fa %s anys","d'aquí %s anys"]][n]},de:function(s,n){return[["gerade eben","vor einer Weile"],["vor %s Sekunden","in %s Sekunden"],["vor 1 Minute","in 1 Minute"],["vor %s Minuten","in %s Minuten"],["vor 1 Stunde","in 1 Stunde"],["vor %s Stunden","in %s Stunden"],["vor 1 Tag","in 1 Tag"],["vor %s Tagen","in %s Tagen"],["vor 1 Woche","in 1 Woche"],["vor %s Wochen","in %s Wochen"],["vor 1 Monat","in 1 Monat"],["vor %s Monaten","in %s Monaten"],["vor 1 Jahr","in 1 Jahr"],["vor %s Jahren","in %s Jahren"]][n]},el:function(s,n){return[["μόλις τώρα","σε λίγο"],["%s δευτερόλεπτα πριν","σε %s δευτερόλεπτα"],["1 λεπτό πριν","σε 1 λεπτό"],["%s λεπτά πριν","σε %s λεπτά"],["1 ώρα πριν","σε 1 ώρα"],["%s ώρες πριν","σε %s ώρες"],["1 μέρα πριν","σε 1 μέρα"],["%s μέρες πριν","σε %s μέρες"],["1 εβδομάδα πριν","σε 1 εβδομάδα"],["%s εβδομάδες πριν","σε %s εβδομάδες"],["1 μήνα πριν","σε 1 μήνα"],["%s μήνες πριν","σε %s μήνες"],["1 χρόνο πριν","σε 1 χρόνο"],["%s χρόνια πριν","σε %s χρόνια"]][n]},en_short:function(s,n){return[["just now","right now"],["%ss ago","in %ss"],["1m ago","in 1m"],["%sm ago","in %sm"],["1h ago","in 1h"],["%sh ago","in %sh"],["1d ago","in 1d"],["%sd ago","in %sd"],["1w ago","in 1w"],["%sw ago","in %sw"],["1mo ago","in 1mo"],["%smo ago","in %smo"],["1yr ago","in 1yr"],["%syr ago","in %syr"]][n]},en_US:n,es:function(s,n){return[["justo ahora","en un rato"],["hace %s segundos","en %s segundos"],["hace 1 minuto","en 1 minuto"],["hace %s minutos","en %s minutos"],["hace 1 hora","en 1 hora"],["hace %s horas","en %s horas"],["hace 1 día","en 1 día"],["hace %s días","en %s días"],["hace 1 semana","en 1 semana"],["hace %s semanas","en %s semanas"],["hace 1 mes","en 1 mes"],["hace %s meses","en %s meses"],["hace 1 año","en 1 año"],["hace %s años","en %s años"]][n]},eu:function(s,n){return[["orain","denbora bat barru"],["duela %s segundu","%s segundu barru"],["duela minutu 1","minutu 1 barru"],["duela %s minutu","%s minutu barru"],["duela ordu 1","ordu 1 barru"],["duela %s ordu","%s ordu barru"],["duela egun 1","egun 1 barru"],["duela %s egun","%s egun barru"],["duela aste 1","aste 1 barru"],["duela %s aste","%s aste barru"],["duela hillabete 1","hillabete 1 barru"],["duela %s hillabete","%s hillabete barru"],["duela urte 1","urte 1 barru"],["duela %s urte","%s urte barru"]][n]},fa:function(s,n){var e=[["لحظاتی پیش","همین حالا"],["%s ثانیه پیش","%s ثانیه دیگر"],["۱ دقیقه پیش","۱ دقیقه دیگر"],["%s دقیقه پیش","%s دقیقه دیگر"],["۱ ساعت پیش","۱ ساعت دیگر"],["%s ساعت پیش","%s ساعت دیگر"],["۱ روز پیش","۱ روز دیگر"],["%s روز پیش","%s روز دیگر"],["۱ هفته پیش","۱ هفته دیگر"],["%s هفته پیش","%s هفته دیگر"],["۱ ماه پیش","۱ ماه دیگر"],["%s ماه پیش","%s ماه دیگر"],["۱ سال پیش","۱ سال دیگر"],["%s سال پیش","%s سال دیگر"]][n];return[e[0].replace("%s",T(s)),e[1].replace("%s",T(s))]},fi:function(s,n){return[["juuri äsken","juuri nyt"],["%s sekuntia sitten","%s sekunnin päästä"],["minuutti sitten","minuutin päästä"],["%s minuuttia sitten","%s minuutin päästä"],["tunti sitten","tunnin päästä"],["%s tuntia sitten","%s tunnin päästä"],["päivä sitten","päivän päästä"],["%s päivää sitten","%s päivän päästä"],["viikko sitten","viikon päästä"],["%s viikkoa sitten","%s viikon päästä"],["kuukausi sitten","kuukauden päästä"],["%s kuukautta sitten","%s kuukauden päästä"],["vuosi sitten","vuoden päästä"],["%s vuotta sitten","%s vuoden päästä"]][n]},fr:function(s,n){return[["à l'instant","dans un instant"],["il y a %s secondes","dans %s secondes"],["il y a 1 minute","dans 1 minute"],["il y a %s minutes","dans %s minutes"],["il y a 1 heure","dans 1 heure"],["il y a %s heures","dans %s heures"],["il y a 1 jour","dans 1 jour"],["il y a %s jours","dans %s jours"],["il y a 1 semaine","dans 1 semaine"],["il y a %s semaines","dans %s semaines"],["il y a 1 mois","dans 1 mois"],["il y a %s mois","dans %s mois"],["il y a 1 an","dans 1 an"],["il y a %s ans","dans %s ans"]][n]},gl:function(s,n){return[["xusto agora","daquí a un pouco"],["hai %s segundos","en %s segundos"],["hai 1 minuto","nun minuto"],["hai %s minutos","en %s minutos"],["hai 1 hora","nunha hora"],["hai %s horas","en %s horas"],["hai 1 día","nun día"],["hai %s días","en %s días"],["hai 1 semana","nunha semana"],["hai %s semanas","en %s semanas"],["hai 1 mes","nun mes"],["hai %s meses","en %s meses"],["hai 1 ano","nun ano"],["hai %s anos","en %s anos"]][n]},he:function(s,n){return[["זה עתה","עכשיו"],["לפני %s שניות","בעוד %s שניות"],["לפני דקה","בעוד דקה"],["לפני %s דקות","בעוד %s דקות"],["לפני שעה","בעוד שעה"],2===s?["לפני שעתיים","בעוד שעתיים"]:["לפני %s שעות","בעוד %s שעות"],["אתמול","מחר"],2===s?["לפני יומיים","בעוד יומיים"]:["לפני %s ימים","בעוד %s ימים"],["לפני שבוע","בעוד שבוע"],2===s?["לפני שבועיים","בעוד שבועיים"]:["לפני %s שבועות","בעוד %s שבועות"],["לפני חודש","בעוד חודש"],2===s?["לפני חודשיים","בעוד חודשיים"]:["לפני %s חודשים","בעוד %s חודשים"],["לפני שנה","בעוד שנה"],2===s?["לפני שנתיים","בעוד שנתיים"]:["לפני %s שנים","בעוד %s שנים"]][n]},hi_IN:function(s,n){return[["अभी","कुछ समय"],["%s सेकंड पहले","%s सेकंड में"],["1 मिनट पहले","1 मिनट में"],["%s मिनट पहले","%s मिनट में"],["1 घंटे पहले","1 घंटे में"],["%s घंटे पहले","%s घंटे में"],["1 दिन 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anni"]][n]},ja:function(s,n){return[["すこし前","すぐに"],["%s秒前","%s秒以内"],["1分前","1分以内"],["%s分前","%s分以内"],["1時間前","1時間以内"],["%s時間前","%s時間以内"],["1日前","1日以内"],["%s日前","%s日以内"],["1週間前","1週間以内"],["%s週間前","%s週間以内"],["1ヶ月前","1ヶ月以内"],["%sヶ月前","%sヶ月以内"],["1年前","1年以内"],["%s年前","%s年以内"]][n]},ko:function(s,n){return[["방금","곧"],["%s초 전","%s초 후"],["1분 전","1분 후"],["%s분 전","%s분 후"],["1시간 전","1시간 후"],["%s시간 전","%s시간 후"],["1일 전","1일 후"],["%s일 전","%s일 후"],["1주일 전","1주일 후"],["%s주일 전","%s주일 후"],["1개월 전","1개월 후"],["%s개월 전","%s개월 후"],["1년 전","1년 후"],["%s년 전","%s년 후"]][n]},ml:function(s,n){return[["ഇപ്പോള്‍","കുറച്ചു മുന്‍പ്"],["%s സെക്കന്റ്‌കള്‍ക്ക് മുന്‍പ്","%s സെക്കന്റില്‍"],["1 മിനിറ്റിനു മുന്‍പ്","1 മിനിറ്റില്‍"],["%s മിനിറ്റുകള്‍ക്ക് മുന്‍പ","%s മിനിറ്റില്‍"],["1 മണിക്കൂറിനു മുന്‍പ്","1 മണിക്കൂറില്‍"],["%s മണിക്കൂറുകള്‍ക്കു മുന്‍പ്","%s മണിക്കൂറില്‍"],["1 ഒരു ദിവസം മുന്‍പ്","1 ദിവസത്തില്‍"],["%s ദിവസങ്ങള്‍ക് മുന്‍പ്","%s ദിവസങ്ങള്‍ക്കുള്ളില്‍"],["1 ആഴ്ച മുന്‍പ്","1 ആഴ്ചയില്‍"],["%s ആഴ്ചകള്‍ക്ക് മുന്‍പ്","%s ആഴ്ചകള്‍ക്കുള്ളില്‍"],["1 മാസത്തിനു മുന്‍പ്","1 മാസത്തിനുള്ളില്‍"],["%s മാസങ്ങള്‍ക്ക് മുന്‍പ്","%s മാസങ്ങള്‍ക്കുള്ളില്‍"],["1 വര്‍ഷത്തിനു  മുന്‍പ്","1 വര്‍ഷത്തിനുള്ളില്‍"],["%s വര്‍ഷങ്ങള്‍ക്കു മുന്‍പ്","%s വര്‍ഷങ്ങള്‍ക്കുല്ല്ളില്‍"]][n]},my:function(s,n){return[["ယခုအတွင်း","ယခု"],["%s စက္ကန့် အကြာက","%s စက္ကန့်အတွင်း"],["1 မိနစ် အကြာက","1 မိနစ်အတွင်း"],["%s မိနစ် အကြာက","%s မိနစ်အတွင်း"],["1 နာရီ အကြာက","1 နာရီအတွင်း"],["%s နာရီ အကြာက","%s နာရီအတွင်း"],["1 ရက် အကြာက","1 ရက်အတွင်း"],["%s ရက် အကြာက","%s ရက်အတွင်း"],["1 ပတ် အကြာက","1 ပတ်အတွင်း"],["%s ပတ် အကြာက","%s ပတ်အတွင်း"],["1 လ အကြာက","1 လအတွင်း"],["%s လ အကြာက","%s လအတွင်း"],["1 နှစ် အကြာက","1 နှစ်အတွင်း"],["%s နှစ် အကြာက","%s နှစ်အတွင်း"]][n]},nb_NO:function(s,n){return[["akkurat nå","om litt"],["%s sekunder siden","om %s sekunder"],["1 minutt siden","om 1 minutt"],["%s minutter siden","om %s minutter"],["1 time siden","om 1 time"],["%s timer siden","om %s timer"],["1 dag siden","om 1 dag"],["%s dager siden","om %s dager"],["1 uke 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veke sidan","om 1 veke"],["%s veker sidan","om %s veker"],["1 månad sidan","om 1 månad"],["%s månadar sidan","om %s månadar"],["1 år sidan","om 1 år"],["%s år sidan","om %s år"]][n]},pl:function(s,n){return T[1&n?4<s%10||s%10<2||1==~~(s/10)%10?n:++n/2+13:n]},pt_BR:function(s,n){return[["agora mesmo","agora"],["há %s segundos","em %s segundos"],["há um minuto","em um minuto"],["há %s minutos","em %s minutos"],["há uma hora","em uma hora"],["há %s horas","em %s horas"],["há um dia","em um dia"],["há %s dias","em %s dias"],["há uma semana","em uma semana"],["há %s semanas","em %s semanas"],["há um mês","em um mês"],["há %s meses","em %s meses"],["há um ano","em um ano"],["há %s anos","em %s anos"]][n]},ro:function(s,n){var e=[["chiar acum","chiar acum"],["acum %s secunde","peste %s secunde"],["acum un minut","peste un minut"],["acum %s minute","peste %s minute"],["acum o oră","peste o oră"],["acum %s ore","peste %s ore"],["acum o zi","peste o zi"],["acum %s zile","peste %s zile"],["acum o 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วัน"],["%s วันที่แล้ว","ใน %s วัน"],["1 อาทิตย์ที่แล้ว","ใน 1 อาทิตย์"],["%s อาทิตย์ที่แล้ว","ใน %s อาทิตย์"],["1 เดือนที่แล้ว","ใน 1 เดือน"],["%s เดือนที่แล้ว","ใน %s เดือน"],["1 ปีที่แล้ว","ใน 1 ปี"],["%s ปีที่แล้ว","ใน %s ปี"]][n]},tr:function(s,n){return[["az önce","şimdi"],["%s saniye önce","%s saniye içinde"],["1 dakika önce","1 dakika içinde"],["%s dakika önce","%s dakika içinde"],["1 saat önce","1 saat içinde"],["%s saat önce","%s saat içinde"],["1 gün önce","1 gün içinde"],["%s gün önce","%s gün içinde"],["1 hafta önce","1 hafta içinde"],["%s hafta önce","%s hafta içinde"],["1 ay önce","1 ay içinde"],["%s ay önce","%s ay içinde"],["1 yıl önce","1 yıl içinde"],["%s yıl önce","%s yıl içinde"]][n]},uk:function(s,n){switch(n){case 0:return["щойно","через декілька секунд"];case 1:return[F(s)+" тому","через "+F(s)];case 2:case 3:return[G(s)+" тому","через "+G(s)];case 4:case 5:return[H(s)+" тому","через "+H(s)];case 6:case 7:return[K(s)+" тому","через "+K(s)];case 8:case 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年後"]][n]}});Object.keys(X).forEach(function(s){r(s,X[s])}),s.cancel=function(s){s?f(h(s)):Object.keys(g).forEach(f)},s.format=function(s,n,e){return m(d(s,e&&e.relativeDate),i(n))},s.register=r,s.render=function(s,n,e){var a=s.length?s:[s];return a.forEach(function(s){p(s,function(s){return s.getAttribute("datetime")}(s),i(n),e||{})}),a},Object.defineProperty(s,"__esModule",{value:!0})});
diff --git a/gh-pages/timeago.min.js b/gh-pages/timeago.min.js
index de96379..fc1f88e 100644
--- a/gh-pages/timeago.min.js
+++ b/gh-pages/timeago.min.js
@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e=e||self).timeago={})}(this,function(e){"use strict";var c=[60,60,24,7,365/7/12,12];function n(e){return e instanceof Date?+e:!isNaN(e)||/^\d+$/.test(e)?+new Date(parseInt(e)):(e=(e||"").trim().replace(/\.\d+/,"").replace(/-/,"/").replace(/-/,"/").replace(/(\d)T(\d)/,"$1 $2").replace(/Z/," UTC").replace(/([+-]\d\d):?(\d\d)/," $1$2"),+new Date(e))}function f(e,t){for(var n=e<0?1:0,r=e=Math.abs(e),a=0;e>=c[a]&&a<c.length;a++)e/=c[a];return(0===(a*=2)?9:1)<(e=~~e)&&(a+=1),t(e,a,r)[n].replace("%s",e)}function d(e,t){return((t=t?n(t):+new Date)-n(e))/1e3}var r=["second","minute","hour","day","week","month","year"];function t(e,t){if(0===t)return["just now","right now"];var n=r[~~(t/2)];return 1<e&&(n+="s"),[e+" "+n+" ago","in "+e+" "+n]}var a=["秒","分钟","小时","天","周","个月","年"];function i(e){return o[e]||t}var o={en_US:t,zh_CN:function(e,t){if(0===t)return["刚刚","片刻后"];var n=a[~~(t/2)];return[e+" "+n+"前",e+" "+n+"后"]}},s="timeago-tid",u="datetime";function l(e){return~~e.getAttribute(s)}var v={},p=function(e){clearTimeout(e),delete v[e]};function h(e,t,n,r){p(l(e));var a=r.relativeDate,i=r.minInterval,o=d(t,a);e.innerText=f(o,n);var u=setTimeout(function(){h(e,t,n,r)},Math.min(1e3*Math.max(function(e){for(var t=1,n=0,r=Math.abs(e);e>=c[n]&&n<c.length;n++)e/=c[n],t*=c[n];return~~(r=(r%=t)?t-r:t)}(o),i||1),2147483647));v[u]=0,function(e,t){e.setAttribute(s,t)}(e,u)}e.cancel=function(e){e?p(l(e)):Object.keys(v).forEach(p)},e.format=function(e,t,n){return f(d(e,n&&n.relativeDate),i(t))},e.register=function(e,t){o[e]=t},e.render=function(e,t,n){var r=e.length?e:[e];return r.forEach(function(e){h(e,function(e){return e.getAttribute(u)}(e),i(t),n||{})}),r},Object.defineProperty(e,"__esModule",{value:!0})});
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e=e||self).timeago={})}(this,function(e){"use strict";var c=[60,60,24,7,365/7/12,12];function n(e){return e instanceof Date?e:!isNaN(e)||/^\d+$/.test(e)?new Date(parseInt(e)):(e=(e||"").trim().replace(/\.\d+/,"").replace(/-/,"/").replace(/-/,"/").replace(/(\d)T(\d)/,"$1 $2").replace(/Z/," UTC").replace(/([+-]\d\d):?(\d\d)/," $1$2"),new Date(e))}function f(e,t){for(var n=e<0?1:0,r=e=Math.abs(e),a=0;e>=c[a]&&a<c.length;a++)e/=c[a];return(0===(a*=2)?9:1)<(e=~~e)&&(a+=1),t(e,a,r)[n].replace("%s",e)}function d(e,t){return(+(t=t?n(t):new Date)-+n(e))/1e3}var r=["second","minute","hour","day","week","month","year"];function t(e,t){if(0===t)return["just now","right now"];var n=r[~~(t/2)];return 1<e&&(n+="s"),[e+" "+n+" ago","in "+e+" "+n]}var a=["秒","分钟","小时","天","周","个月","年"];function i(e){return o[e]||t}var o={en_US:t,zh_CN:function(e,t){if(0===t)return["刚刚","片刻后"];var n=a[~~(t/2)];return[e+" "+n+"前",e+" "+n+"后"]}},s="timeago-id";function l(e){return parseInt(e.getAttribute(s))}var p={},v=function(e){clearTimeout(e),delete p[e]};function h(e,t,n,r){v(l(e));var a=r.relativeDate,i=r.minInterval,o=d(t,a);e.innerText=f(o,n);var u=setTimeout(function(){h(e,t,n,r)},Math.min(1e3*Math.max(function(e){for(var t=1,n=0,r=Math.abs(e);e>=c[n]&&n<c.length;n++)e/=c[n],t*=c[n];return r=(r%=t)?t-r:t,Math.ceil(r)}(o),i||1),2147483647));p[u]=0,function(e,t){e.setAttribute(s,t)}(e,u)}e.cancel=function(e){e?v(l(e)):Object.keys(p).forEach(v)},e.format=function(e,t,n){return f(d(e,n&&n.relativeDate),i(t))},e.register=function(e,t){o[e]=t},e.render=function(e,t,n){var r=e.length?e:[e];return r.forEach(function(e){h(e,function(e){return e.getAttribute("datetime")}(e),i(t),n||{})}),r},Object.defineProperty(e,"__esModule",{value:!0})});
diff --git a/src/locales.ts b/src/locales.ts
index 39837c0..301ba51 100644
--- a/src/locales.ts
+++ b/src/locales.ts
@@ -30,6 +30,6 @@ export const register = (locale: string, func: LocaleFunc) => {
  * @param locale
  * @returns {*}
  */
-export const getLocale = (locale) => {
+export const getLocale = (locale: string): LocaleFunc => {
   return Locales[locale] || en_US;
 };
diff --git a/src/utils/date.ts b/src/utils/date.ts
index 8610073..5fe1c46 100644
--- a/src/utils/date.ts
+++ b/src/utils/date.ts
@@ -12,10 +12,10 @@ const SEC_ARRAY = [60, 60, 24, 7, 365 / 7 / 12, 12];
  * @param input
  * @returns {*}
  */
-export function toTimestamp(input?: Date | string | number): number {
-  if (input instanceof Date) return +input;
+export function toDate(input?: Date | string | number): Date {
+  if (input instanceof Date) return input;
   // @ts-ignore
-  if (!isNaN(input) || /^\d+$/.test(input)) return +new Date(parseInt(input));
+  if (!isNaN(input) || /^\d+$/.test(input)) return new Date(parseInt(input));
   input = (input || '')
     // @ts-ignore
     .trim()
@@ -25,7 +25,7 @@ export function toTimestamp(input?: Date | string | number): number {
     .replace(/(\d)T(\d)/, '$1 $2')
     .replace(/Z/, ' UTC') // 2017-2-5T3:57:52Z -> 2017-2-5 3:57:52UTC
     .replace(/([+-]\d\d):?(\d\d)/, ' $1$2'); // -04:00 -> -0400
-  return +new Date(input);
+  return new Date(input);
 }
 
 /**
@@ -48,6 +48,7 @@ export function formatDiff(diff: number, localeFunc: LocaleFunc): string {
   for (; diff >= SEC_ARRAY[idx] && idx < SEC_ARRAY.length; idx++) {
     diff /= SEC_ARRAY[idx];
   }
+  // Math.floor
   diff = ~~diff;
   idx *= 2;
 
@@ -62,9 +63,9 @@ export function formatDiff(diff: number, localeFunc: LocaleFunc): string {
  * @param relativeDate
  * @returns
  */
-export function diffSec(date: TDate, relativeDate): number {
-  relativeDate = relativeDate ? toTimestamp(relativeDate) : +new Date();
-  return (relativeDate - toTimestamp(date)) / 1000;
+export function diffSec(date: TDate, relativeDate: TDate): number {
+  relativeDate = relativeDate ? toDate(relativeDate) : new Date();
+  return (+relativeDate - +toDate(date)) / 1000;
 }
 
 /**
@@ -86,6 +87,5 @@ export function nextInterval(diff: number): number {
   }
   d = d % rst;
   d = d ? rst - d : rst;
-  // Math.ceil
-  return ~~d;
+  return Math.ceil(d);
 }
diff --git a/src/utils/dom.ts b/src/utils/dom.ts
index a77b77d..0b0b9c2 100644
--- a/src/utils/dom.ts
+++ b/src/utils/dom.ts
@@ -1,5 +1,4 @@
-const ATTR_TIMEAGO_TID = 'timeago-tid';
-const ATTR_DATETIME = 'datetime';
+const ATTR_TIMEAGO_TID = 'timeago-id';
 
 /**
  * get the datetime attribute, `datetime` are supported.
@@ -7,7 +6,7 @@ const ATTR_DATETIME = 'datetime';
  * @returns {*}
  */
 export function getDateAttribute(node: HTMLElement): string {
-  return node.getAttribute(ATTR_DATETIME);
+  return node.getAttribute('datetime');
 }
 
 /**
@@ -26,5 +25,5 @@ export function setTimerId(node: HTMLElement, timerId: number): void {
  * @param node
  */
 export function getTimerId(node: HTMLElement): number {
-  return ~~node.getAttribute(ATTR_TIMEAGO_TID);
+  return parseInt(node.getAttribute(ATTR_TIMEAGO_TID));
 }