Common operations Summary of date types in JavaScript _ basics

Common Operations Summary of date types in JavaScript

/** 3. * Date Time Script Library method list: 4. * (1) Date.isvalidate: Date legality verification 5. * (2) Date.isvalitime: Time Validity verification 6. * (3) Date.isvalidatetime: Validation of date and time legality 7. * (4) Date.prototype.isLeapYear: Judge whether leap Year 8. * (5) Date.prototype.format: Date format 9. * (6) Date.stringtodate: string converted to date type 10. * (7) Date.daysbetween: Calculates a two-day difference of 11 days. * (8) DATE.PROTOTYPE.DATEADD: Date calculation, support positive and negative number 12. * (9) Date.prototype.dateDiff: compare date Difference: Compare two periods of the same field, return the difference value 13. * (a) Date.prototype.toArray: the date is divided into groups: according to the array ordinal number: month-day time of 14 seconds. * (one) Date.prototype.datePart: Get Date data information 15. 
* * 16. 17.18./** 19. * Date Legality verification: Determines whether datastr conforms to the FORMATSTR specified date format 20. * Example: 21. * (1) alert (date.isvalidate (' 2008-02-29 ', ' yyyy-mm-dd '));//true 22. * (2) alert (date.isvalidate (' aaaa-58-29 ', ' yyyy-mm-dd '));//false 23. * DATESTR: Required, date string 24. * FORMATSTR: Optional, format string, optional format: (1) yyyy-mm-dd (default) or YYYY-MM-DD (2) Yyyy/mm/dd or YYYY/MM/DD (3) mm-dd-yyyy or MM-DD-YYYY (4) mm/ Dd/yyyy or mm/dd/yyyy 25. */26.date.isvalidate = function (Datestr, FORMATSTR) 27.    {. if (!datestr) {29. 
return false;  30.} 31. if (!formatsTR) {32.  Formatstr = "YYYY-MM-DD";//Default format: Yyyy-mm-dd 33.  } 34.    if (datestr.length!=formatstr.length) {35. 
return false;    }else{37. if (formatstr== "Yyyy-mm-dd" | |      formatstr== "Yyyy-mm-dd") {38. var r1=/^ ((([02468][048]) | [13579] [26])) (00)) | (\d{2} ([02468][48]) | ( [13579] [26]))) \-(((0[13578)) | (1[02]) \-([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-2][0-9])) | (\d{2} ([02468][1235679]) | ( [13579] [01345789])) \-(((0[13578)) | (1[02]) \-([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-1][0-9]) | ( 
2[0-8]))) $/; 
R1.test return (DATESTR); }else if (formatstr== "Yyyy/mm/dd" | |      formatstr== "Yyyy/mm/dd") {41. var r2=/^ ((([02468][048]) | [13579] [26])) (00)) | (\d{2} ([02468][48]) | ( [13579] [26]))) \/(((0[13578)) | (1[02]) \/([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \/([0-2][0-9]) | (30)) | (02\/([0-2][0-9])) | (\d{2} ([02468][1235679]) | ( [13579] [01345789])) \/(((0[13578)) | (1[02]) \/([0-2][0-9]) | (3[01])) | (((0[469]) | (11) \/([0-2][0-9]) | ( 30)) | (02\/([0-1][0-9]) | ( 
2[0-8]))) $/; 
Return R2.test (DATESTR); }else if (formatstr== "mm-dd-yyyy" | |      formatstr== "Mm-dd-yyyy") {44. var r3=/^ ((((0[13578)) | ( 1[02]) \-([0-2][0-9]) | ( 3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-2][0-9])) \-(([02468][048]) | ([13579][26]) (00)) | (\d{2} ([02468][48]) | ( [13579] [26])) | ((((0[13578]) | (1[02]) \-([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-1][0-9]) | ( 2[0-8])) \-\d{2} ([02468][1235679]) | ( [13579] [01345789])) 
$/; 
R3.test return (DATESTR); }else if (formatstr== "mm/dd/yyyy" | |      formatstr== "Mm/dd/yyyy") {47. var r4=/^ ((((0[13578)) | ( 1[02]) \/([0-2][0-9]) | ( 3[01])) | (((0[469]) | (11)) \/([0-2][0-9]) | (30)) | (02\/([0-2][0-9])) \/(([02468][048]) | ([13579][26]) (00)) | (\d{2} ([02468][48]) | ( [13579] [26])) | ((((0[13578]) | (1[02]) \/([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \/([0-2][0-9]) | (30)) | (02\/([0-1][0-9]) | ( 2[0-8])) \/\d{2} ([02468][1235679]) | ( [13579][01345789])) $/; 
Return R4.test (DATESTR);      }else{50. Alert ("date format is not correct!") 
"); 
A. return false;  52.} 53.  } 54. 
return false; 
55.} 56. 57.58./** 59. * Time Validity validation: Determines whether timestr conforms to the FORMATSTR specified time format 60. * Example: 61. * (1) alert (date.isvalitime (' 23:59:59 ', ' hh:mm:ss '));//true 62. * (2) alert (date.isvalitime (' 24-68-89 ', ' hh:mm:ss '));//false 63. * TIMESTR: Required, date string 64. * FORMATSTR: Optional, format string, optional format: (1) hh:mm:ss (default) (2) Hh-mm-ss (3) hh/mm/ss 65. */66.date.isvalitime = function (TIMESTR, FORMATSTR) 67.    {69. if (!TIMESTR). 
return false;  70.} 71.    if (!FORMATSTR) {72.  Formatstr = "HH:MM:SS";//Default format: Hh:mm:ss 73.  } 74.    if (timestr.length!=formatstr.length) {75. 
return false;    }else{77.      if (formatstr== "Hh:mm:ss") {78. var r1=/^ ([0-1][0-9]) | ( 
2[0-3]) \:([0-5][0-9]) \:([0-5][0-9]) $/; 
R1.test return (TIMESTR);      }else if (formatstr== "Hh-mm-ss") {81. var r2=/^ ([0-1][0-9]) | ( 2[0-3]) \-([0-5][0-9]) \-([0-5][0-9]) $/;
A. Return r2.test (TIMESTR);      }else if (formatstr== "Hh/mm/ss") {84. var r3=/^ ([0-1][0-9]) | ( 
2[0-3]) \/([0-5][0-9]) \/([0-5][0-9]) $/; 
Return R3.test (TIMESTR);      }else{87. Alert ("Time format is not correct!") 
"); 
return false;  89.} 90.  } 91. 
return false; 
92.} 93. 94.95./** 96. * Date and time legality validation 97. * Format: YYYY-MM-DD HH:MM:SS 98. */99.date.isvalidatetime = function (datetimestr) 100. {datetimereg=/^ var ((([02468][048]) | [13579] [26])) (00)) | (\d{2} ([02468][48]) | ( [13579] [26]))) \-(((0[13578)) | (1[02]) \-([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-2][0-9])) | (\d{2} ([02468][1235679]) | ( [13579] [01345789])) \-(((0[13578)) | (1[02]) \-([0-2][0-9]) | (3[01])) | (((0[469]) | (11)) \-([0-2][0-9]) | (30)) | (02\-([0-1][0-9]) | ( 2[0-8]))) (\s{1} ([0-1][0-9]) | (  2[0-3]) \:([0-5][0-9]) \:([0-5][0-9])? $/102. 
Return Datetimereg.test (DATETIMESTR); 
103.} 104. 105.106./** 107. 
* Judgment Leap Year: General law: Four years a leap, hundred years not a leap, 400 year again leap. 108. */109.date.protOtype.isleapyear = function () 110. {A. return (This.getyear ()%4==0&& (This.getyear ()%100!=0) | | 
(This.getyear ()%400==0)); 
112.} 113. 114.115./** 116. * Date format: 117. * FORMATSTR: Optional, format string, default format: Yyyy-mm-dd HH:MM:SS 118. * agreed to the following format: 119. * (1) Yyyy/yyyy/yy/yy represents the year 120. * (2) mm/m month 121. * (3) w/w Week 122. * (4) dd/dd/d/d date 123. * (5) hh/hh/h/h time 124. * (6) mm/m minutes 125. * (7) ss/ss/s/s seconds 126. * (8) III millisecond 127. */128.date.prototype.format = function (FORMATSTR) 129. 
{130. var str = FORMATSTR;    131. if (!FORMATSTR) {132.  str = "Yyyy-mm-dd hh:mm:ss";//Default format 133.  } 134. 
var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six '];  135.136. Str=str.replace (/yyyy| 
Yyyy/,this.getfullyear ()); 137. Str=str.replace (/yy| yy/, (this.getyear ()%) >9? 
(This.getyear ()%). ToString (): ' 0 ' + (this.getyear ()% 100));  138.139. Str=str.replace (/mm/,this.getmonth () >=9? ( 
parseint (This.getmonth ()) +1). ToString (): ' 0 ' + (parseint (This.getmonth ()) +1)); 140. Str=str.replace (/m/g, parseInt (This.getmonth ()) +1));  141.142. Str=str.replace (/w| 
W/g,week[this.getday ()]);  143.144. Str=str.replace (/dd| 
Dd/,this.getdate () >9?this.getdate (). toString (): ' 0 ' + this.getdate ()); 145. Str=str.replace (/d| 
D/g,this.getdate ());  146.147. Str=str.replace (/hh| 
Hh/,this.gethours () >9?this.gethours (). toString (): ' 0 ' + this.gethours ()); 148. Str=str.replace (/h| 
H/g,this.gethours ()); 
149. Str=str.replace (/mm/,this.getminutes () >9?this.getminutes (). toString (): ' 0 ' + this.getminutes ()); 
Str=str.replace (/m/g,this.getminutes ());  151.152. Str=str.replace (/ss| 
Ss/,this.getseconds () >9?this.getseconds (). toString (): ' 0 ' + this.getseconds ()); 153. Str=str.replace (/s| 
S/g,this.getseconds ());  154.155. Str=str.replace (/iii/g,this.getmilliseconds () <10? ' ' +this.getmilliseconds ():(this.getmilliseconds () <100? ' 
0 ' +this.getmilliseconds (): This.getmilliseconds ());  156.157. 
return str; 
158.} 159. 160.161./** 162. * string is converted to date type: 163. * DATESTR: Required, date string, such asThe result cannot be resolved to a date type and returns null 164. * Format: 165. * (1) Yyyy/mm/dd:ie and FF General 166. * (2) Mm/dd/yyyy:ie and FF General 167. * (3) mm-dd-yyyy: IE 168 only. * (4) YYYY-MM-DD: Non ie, and the clock is resolved at 8 o'clock full 169. */170.date.stringtodate = function (datestr) 171.    {172. if (!DATESTR) {173. 
Alert ("string cannot resolve to date"); 
174. return null;    175.}else{176. if (Date.isvalidate (Datestr, "Yyyy/mm/dd") | |      Date.isvalidate (Datestr, "mm/dd/yyyy")) {177. 
return new Date (Date.parse (DATESTR));      178.}else{179.        if ((!-[1,])) {//ie 180.          if (Date.isvalidate (Datestr, "mm-dd-yyyy")) {181. 
return new Date (Date.parse (DATESTR));          }else{183. 
Alert ("string cannot resolve to date"); 
184. return null;      185.} 186.        }else{//is not IE 187.          if (Date.isvalidate (Datestr, "Yyyy-mm-dd")) {188. 
return new Date (Date.parse (DATESTR));          189.}else{190. 
Alert ("string cannot resolve to date"); 
191. return null;      192.} 193.    } 194.  } 195.  } 196. 
return null; 
197.} 198. 199.200./** 201. * Calculate the two-day difference in days: 202. * Dateone: Required, must be instance 203 of the data type. * Datetwo: Required, must be instance 204 of the data type. */205.date.daysbetween = function (dateone,datetwo) 206. {207. If (Dateone instanceof Date) ==false| |    (Datetwo instanceof Date) ==false) {208. 
return 0;    209.}else{210. 
Return Math.Abs (Math.floor (Dateone.gettime ()-datetwo.gettime ())/1000/60/60/24); 
211.} 212.} 
213.214. 215./** 216. * Date Calculation: Support negative numbers, you can add and subtract, return the calculated date 217. * Num: Required, must be a number, and positive numbers are time plus, minus 218 is the date. * Field: Optional, the identification is in which field to add or subtract, the field see the following convention. Without this parameter, the default is D 219. * agreed to the following format: 220. * (1) y/y year 221. * (2) M-month 222. * (3) w/w Week 223. * (4) d/d Day 224. * (5) h/h 225. * (6) m minute 226. * (7) s/s seconds 227. * (8) q/q Quarter 228. */229.date.prototype.dateadd = function (num, field) 230. {231. if (!num) | | isNaN (num) | |    parseint (num) ==0) {232. 
return this;  233.} 234.    if (!field) {235. 
field = "D";  236.} 237.    Switch (field) {238.    Case ' Y ': 239. Case ' Y ': Return new Date ((This.getfullyear () +num), This.getmonth (), this.getdate (), thIs.gethours (), This.getminutes (), this.getseconds ());    Case ' Q ': 241. Case ' Q ': return new Date (This.getfullyear (), (This.getmonth () +num*3), This.getdate (), this.gethours (), 
This.getminutes (), this.getseconds ()); 242. Case ' M ': return new Date (This.getfullyear (), This.getmonth () +num, This.getdate (), this.gethours (), This.getminute 
S (), this.getseconds ());    243. Case ' W ': 244. 
Case ' W ': Return to New Date (Date.parse (This) + ((86400000 * 7) * num));    245. Case ' D ': 246. 
Case ' d ': Return to New Date (Date.parse (this) + (86400000 * num));    247. Case ' H ': 248. 
Case ' H ': Return to New Date (Date.parse (this) + (3600000 * num)); 
249. Case ' m ': Return to New Date (Date.parse (this) + (60000 * num));    Case ' S ': 251. 
Case ' s ': Return to New Date (Date.parse (this) + (1000 * num)); 
252. Default:return this;  253.} 254. 
return this; 
255.} 256. 257.258./** 259. * Compare Date Difference: Compares two periods of the same field, returns the difference value 260. * Dtend: Required, must be the data typeInstance 261. * Field: Optional, the identification is in which field to compare, the field see the following convention. Without this parameter, the default is D 262. * agreed to the following format: 263. * (1) y/y year 264. * (2) M-month 265. * (3) w/w week 266. * (4) d/d Day 267. * (5) h/h 268. * (6) m minute 269. * (7) s/s seconds 270. */271.date.prototype.datediff = function (dtend, field) 272. 
{273. var dtstart = this;    274. if ((dtend instanceof Date) ==false) {275. 
return 0;    276.}else{277.      if (!field) {278. 
field = "D";    279.} 280.      Switch (field) {281.      Case ' Y ': 282. 
Case ' Y ': return dtend.getfullyear ()-dtstart.getfullyear (); 283. Case ' M ': Return (Dtend.getmonth () +1) + ((Dtend.getfullyear ()-dtstart.getfullyear ()) *12)-(Dtstart.getmonth () +1) 
; break;      284. Case ' W ': 285. 
Case ' W ': Return parseint ((Dtend-dtstart)/(86400000 * 7));      286. Case ' D ': 287. 
Case ' d ': Return parseint ((dtend-dtstart)/86400000);      Case ' H ': 289. 
Case ' H ': Return parseint ((dtend-dtstart)/3600000); 290. Case ' m ': Return parseint (DTEND-DTStart)/60000);      291. Case ' S ': 292. 
Case ' s ': Return parseint ((Dtend-dtstart)/1000); 
293. Default:return 0;    294.} 295. 
return 0; 
296.} 297.} 
298.299. 300./** 301. * The date is divided into groups: according to the array ordinal number: month-day time of 302 seconds. */303.date.prototype.toarray = function () 304. 
{305. var myarray = new Array (); 
306. myarray[0] = This.getfullyear (); 
307. Myarray[1] = This.getmonth (); 
308. myarray[2] = This.getdate (); 
309. Myarray[3] = this.gethours (); 
310. myarray[4] = This.getminutes (); 
311. myarray[5] = This.getseconds (); 
312. return myarray; 
313.} 314. 315.316./** 317. * Get Date Data information: 318. * Field: Optional, the identification is in which field to compare, the field see the following convention. Without this parameter, the default is D 319. * (1) y/y year 320. * (2) M-month 321. * (3) w/w Week 322. * (4) D/D Day 323. * (5) h/h 324. * (6) m minute 325. * (7) S/S seconds 326. */327.date.prototype.datepart = function (field) 328.    {329. if (!field) {330. 
field = "D";  331.} 332. 
var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six '];    333. switch (field) {334. Case ' Y ': 335. 
Case ' Y ': return this.getfullyear (); 
336. Case ' M ': Return (This.getmonth () +1);    337. Case ' W ': 338. 
Case ' W ': Return Week[this.getday ()];break;    339. Case ' D ': 340. 
Case ' d ': return This.getdate ();    341. Case ' H ': 342. 
Case ' H ': return This.gethours (); 
343. Case ' m ': return This.getminutes (); 
344. Case ' s ': return This.getseconds (); 
345. Default:return This.getdate ();  346.} 347. 
return This.getdate ();  348.}

The most common operation of date types in this JavaScript is the small series to share all the content, hope to give you a reference, but also hope that we support the cloud habitat community.