Question

I have a string that would represents a duration.
it can be like one of the following :

10d12h59m

10d12h

10d

12h

70

number before the "d" represents days ,number before "h" represents hours ,number before "m" represents minutes and if its just number then it means minutes.

I would like a javascript regular expression that will match that string.

Answer 1

If you only want to check if it matches: /^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/

examples:

"10d12h59m".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // Array ["10d12h59m"]
"10d12h".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // Array ["10d12h"]
"10d".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // Array ["10d"]
"12h".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // Array ["12h"]
"70".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); //Array ["70"]

"foobar".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // null
"10d50m".match(/^(?:\d+d(?:\d+h(?:\d+m)?)|\d+[dh]?)$/); // null