Regular Expressions 101

All the errors detected are listed below, from left to right, as they appear in the pattern.

" Delimiter must be escaped with `\`

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<(?:button|input)\s+[^>]*class\s*=\s*["'][^"']*btn[^"']*[^>]*>

New

<button type="submit" class="btn btn-default btn-block">
<input type="button" class="btn btn-default multilingual-helper" value="{{ language.code.upper() }}"/>

Regular Expression

Extraction