Eliminate newlines in google app script using regex

It seems that in replaceText, to remove soft returns entered with Shift-ENTER, you can use \v:

.replaceText("\\v+", "")

If you want to remove all "other" control characters (C0, DEL and C1 control codes), you may use

.replaceText("\\p{Cc}+", "")

Note that the \v pattern is a construct supported by JavaScript regex engine, and is considered to match a vertical tab character (≡ \013) by the RE2 regex library used in most Google products.

The Google Apps Script function replaceText() still doesn't accept escape characters, but I was able to get around this by using getText(), then the generic JavaScript replace(), then setText():

var doc = DocumentApp.getActiveDocument();
var body = doc.getBody();

var bodyText = body.getText();

//DocumentApp.getUi().alert( "Does document contain \\t? " + /\t/.test( bodyText ) ); // \n true, \r false, \t true

bodyText = bodyText.replace( /\n/g, "" );
bodyText = bodyText.replace( /\t/g, "" );

body.setText( bodyText );

This worked within a Doc. Not sure if the same is possible within a Sheet (and, even if it were, you'd probably have to run this once cell at a time).