Regular expression to search for {text} but ignore {{text}}?

Question

Regular Expressions

Good afternoon, I can’t compose a regular expression that will search in the text:
{text}, but ignore {{text}} {{{text}}} and so on, you only need 1 bracket around the edges.

Now my regex is this:
{(\w+)}
But the problem is that it finds an extra

one. How to exclude from the selection cases when there are more brackets than specified?

Answer 1

(?<!\{)\{(\w+)\}(?!\})