Like this:
if (str.indexOf("Yes") >= 0)
…or you can use the tilde operator:
if (~str.indexOf("Yes"))
This works because indexOf()
returns -1
if the string wasn’t found at all.
Note that this is case-sensitive.
If you want a case-insensitive search, you can write
if (str.toLowerCase().indexOf("yes") >= 0)
Or:
if (/yes/i.test(str))
The latter is a regular expression or regex.
Regex breakdown:
/
indicates this is a regexyes
means that the regex will find those exact characters in that exact order/
ends the regexi
sets the regex as case-insensitive.test(str)
determines if the regular expression matchesstr
To sum it up, it means it will see if it can find the lettersy
,e
, ands
in that exact order, case-insensitively, in the variablestr