Regular Expressions 101

Explanation

Pro

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

scriptthe literal text script (case insensitive)

.*any character (except for line terminators), repeated any number of times

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 1(.*<\/script>)?

?repeats the group contents below at most once:

.*any character (except for line terminators), repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

script>the literal text script> (case insensitive)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

<\/?script.*\/?>(.*<\/script>)?

New

asdf<script>qwer</script>zxcv

/><script/> asdf
asdf><script />asdf
asdf> <script asdf/> a
a <script asdf=asdf/><asdf
asdf<script asdf=asdf /> <asdf
asdf<script asdf=asdf a/>

<script>
alert();
</script>