Regular Expressions 101

@require the literal text @require (case sensitive)

Group 1(.+?)?

?repeats the group contents below at most once:

.+?any character (except for line terminators), repeated at least once

Non-Capturing Group(?:-->|\s)

1st Alternative-->

-->the literal text -->

2nd Alternative\s

\sany whitespace character

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

@require (.+?)?(?:-->|\s)

New

<head>
    <meta charset="UTF-8">
    <title></title>
    <!--@require a.css-->
    <!--@require BOWER/jquery-->
    <!--@require /build/bundle-->
    <!--
        @require bootstrap
        @require bootstrap.css
        @require bootstrap.font
    -->
</head>

Regular Expression

Extraction