javascript difference between two dates in hours, minutes and seconds
ToaddsecondstodateinJavaScript:UsethegetSeconds()methodtogetthesecondsofthegivendate.UsethesetSeconds()methodby ...,AJavaScriptdateisfundamentallyspecifiedasthetimeinmillisecondsthathaselapsedsincetheepoch,whichisdefinedasthemidnightatthebeginnin...。參考影片的文章的如下: