Find missing words in rows in Notepad++

Question

I have a folder with 2 kind of sentences/rows. One that has < h1 > tag, and other doesn't. Like so:

< td class="articles">Mama< /td>
< td class="articles">< h1>Tata < /h1>< /td>

I want to find with Notepad++ only the rows that doesn't have the word < h1>

Does anybody know how to do this?

Answer 1

Use the find or replace window (ctrl+f) or (ctrl+h) and set it to use regular expressions.

Now use the regex:

(?-s)(?i)^(?:.(?!<(?: |\t)h1(?: |\t|>)))*$

This will find any line that doesn't contain for example:

• < h1 >
• <h1 style="">
• <H1 >