javascript - Replace substring in string using regexp -

i need replace substring in string.

string is /string/otherstring?query=d78f1dbee59de41245fbf3c82b72b859ab688e30

substring query=d78f1dbee59de41245fbf3c82b72b859ab688e30 need replace query=

i want replace using regexp , using string.replace. can't write regexp.

/\/string\/otherstring?query=/.exec(     '/string/otherstring?query=d78f1dbee59de41245fbf3c82b72b859ab688e30' ) 

it's not working.

p.s. d78f1dbee59de41245fbf3c82b72b859ab688e30 sha1 hash

use string.replace . don't need apply exec function.

string.replace(/(\/string\/otherstring\?query=)[a-za-z0-9]+/g, "$1") 

or

try if want deal lowercase letters , numbers.

string.replace(/(\/string\/otherstring\?query=)[a-z\d]+/g, "$1")