역시 보존되므로 교체할 문자열에 ‘다시 넣는’ 방법을 생각할 필요가 없다는 장점이 있습니다.
const
emailMatcher
=
/\
b
[
a
-
z
][
a
-
z0
-
9
._-]*@[
a
-
z
][
a
-
z0
-
9
_-]+\.[
a
-
z
]+(?:\.[
a
-
z
]+)?\
b
/
ig
;
inputs
.
map
(
s
=>
s
.
replace
(
emailMatcher
, '<
a
href
="
mailto
:$&">$&</
a
>'));
// [
// "<
a
href
="
mailto
:
john
@
doe
.
com
">
john
@
doe
.
com
</
a
>",
// "<
a
href
="
mailto
:
john
@
doe
.
com
">
john
@
doe
.
com
</
a
>
is
my
email
",
// "
my
email
is
<
a
href
="
mailto
:
john
@
doe
.
com
">
john
@
doe
.
com
</
a
>",
// "
use
<
a
href
="
mailto
:
john
@
doe
.
com
">
john
@
doe
.
com
</
a
>,
my
email
",
// "
my
email
:<
a
href
="
mailto
:
john
@
doe
.
com
>
john
@
doe
.
com
</
a
>.",
// ]
이 정규식에는 단어 경계와 함께 이 장에서 배운 내용이 많이 들어 있습니다. 한 번에 이해되지
않을 수도 있지만, 자세히 살펴보면 정규식을 마스터하는 데 큰 도움이 될 겁니다. 특히,
$&
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