is
Return whether input matches regex of username.
scope for "a-z", "A-Z", "0-9", "_", "Chinese character"
can't end with "_"
length is between 6 to 20.
Return
true: yesfalse: no
Parameters
input
The input.
Return whether input matches regex of username.
scope for "a-z", "A-Z", "0-9", "_", "Chinese character"
can't end with "_"
length is between 6 to 20.
true: yesfalse: no
The input.