How can I avoid double line breaks (

) in a text field (field type: text unformatted long)?

How can I avoid double line breaks (<br><br>) in a text field (field type: text unformatted, long)?

Users write text into this text field. When they hit Enter twice, the result is: <br><br>. But <br><br> is not themable with css, the height of <br> can NOT be set with css.

Therefore <br><br> should be avoided and paragraphs <p> used instead of it. <br><br> should never be saved to database. How can double <br><br> be avoided or replaced with <p> before the the field is saved?

You can style br tag in CSS, but before you need to reset it by using these declarations:

br {
  display: "block";
  content: "";
}

Then you can style it as you want, it can be done using margin property, so the code will be such as:

br {
  display: "block";
  content: "";
  margin: 1em 0;
}