getRelativeTime.ts

 
 ​// base is milliseconds 
 ​const​ ​second​ ​=​ ​1000 
 ​const​ ​minute​ ​=​ ​60​ ​*​ ​second 
 ​const​ ​hour​ ​=​ ​60​ ​*​ ​minute 
 ​const​ ​day​ ​=​ ​24​ ​*​ ​hour 
 ​const​ ​week​ ​=​ ​7​ ​*​ ​day 
 ​const​ ​month​ ​=​ ​4​ ​*​ ​week 
 ​const​ ​year​ ​=​ ​12​ ​*​ ​month 
  
 ​type​ ​RelativeTimeFormatUnit​ ​= 
 ​  ​|​ ​'year' 
 ​  ​|​ ​'years' 
 ​  ​|​ ​'quarter' 
 ​  ​|​ ​'quarters' 
 ​  ​|​ ​'month' 
 ​  ​|​ ​'months' 
 ​  ​|​ ​'week' 
 ​  ​|​ ​'weeks' 
 ​  ​|​ ​'day' 
 ​  ​|​ ​'days' 
 ​  ​|​ ​'hour' 
 ​  ​|​ ​'hours' 
 ​  ​|​ ​'minute' 
 ​  ​|​ ​'minutes' 
 ​  ​|​ ​'second' 
 ​  ​|​ ​'seconds' 
  
 ​export​ ​const​ ​getRelativeTime​ ​=​ ​(​timeStamp​: ​number​)​ ​=>​ ​{ 
 ​  ​try​ ​{ 
 ​    ​const​ ​rtf​ ​=​ ​new​ ​Intl​.​RelativeTimeFormat​(​'en'​,​ ​{​ ​numeric​: ​'auto'​ ​}​) 
 ​    ​const​ ​currentTime​ ​=​ ​Date​.​now​(​) 
 ​    ​let​ ​distance​ ​=​ ​Math​.​abs​(​timeStamp​ ​-​ ​currentTime​) 
  
 ​    ​let​ ​keyWord​: ​RelativeTimeFormatUnit 
 ​    ​if​ ​(​distance​ ​<​ ​second​)​ ​{ 
 ​      ​return​ ​'A few moments ago' 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​second​ ​&&​ ​distance​ ​<​ ​minute​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'second' 
 ​      ​distance​ ​/=​ ​second 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​minute​ ​&&​ ​distance​ ​<​ ​hour​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'minute' 
 ​      ​distance​ ​/=​ ​minute 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​hour​ ​&&​ ​distance​ ​<​ ​day​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'hour' 
 ​      ​distance​ ​/=​ ​hour 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​day​ ​&&​ ​distance​ ​<​ ​week​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'day' 
 ​      ​distance​ ​/=​ ​day 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​week​ ​&&​ ​distance​ ​<​ ​month​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'week' 
 ​      ​distance​ ​/=​ ​week 
 ​    ​}​ ​else​ ​if​ ​(​distance​ ​>​ ​month​ ​&&​ ​distance​ ​<​ ​year​)​ ​{ 
 ​      ​keyWord​ ​=​ ​'month' 
 ​      ​distance​ ​/=​ ​month 
 ​    ​}​ ​else​ ​{ 
 ​      ​keyWord​ ​=​ ​'year' 
 ​      ​distance​ ​/=​ ​year 
 ​    ​} 
  
 ​    ​distance​ ​=​ ​Math​.​round​(​distance​) 
  
 ​    ​return​ ​rtf​.​format​(​-​1​ ​*​ ​distance​,​ ​keyWord​) 
 ​  ​}​ ​catch​ ​{ 
 ​    ​return​ ​timeStamp 
 ​  ​} 
 ​}