Detect HTML tags in textarea/text input with javascript, but it should supports the common > and <

Question

I wanna to detect the the html tags in textarea or text input before submitting a form, it looks easy to do the detection "roughly" with regular expression /<\\/?[^>]*>/gi.test(str)

But if there are some normal content like " This clothes is not suitable for me since my height < 180cm and > 170cm ", the previous regExp will consider this content contains html tags coz there are < and > ..

So, how to detect the html tags while supporting the normal greater-than and less-than sign?

Thanks.

Answer 1

Just Change the * in you Expression to a Plus: /<\\/?[^>]+>/gi

• * Means 0 or 1 of the pre Token
• + Means 1 or more

And a HTML tag always has at least one char in the tag.