https://homounicum.ru/nassets/bc0ec94/p2br.js?v=1765633899

1function p2br(str) {
2	// Wandelt <p>FooBar</p> in FooBar<BR> um
3	// <BR> am Ende innerhalb eines <P>-Blocks (2* neue Zeile) -> einfaches <BR>
4	var i, matches, m, str;
5	matches = str.match(/<BR>\s*<\/P>/ig);
6	for (i in matches) {
7    	if (isNaN(i)) continue;
8    	m = matches[i].toString();
9    	str = replacer(m, "<BR>", str);
10	}
11
12	var placeholder = "<PTOBR>"
13
14	str = replacer("</p>", placeholder, str);
15	str = replacer("</P>", placeholder, str);
16	str = replacer("<p>", "", str);
17	str = replacer("<P>", "", str);
18
19	if ( str.slice( -1 * placeholder.length ) == placeholder ) {
20		str = str.substring( 0, str.length - placeholder.length )
21	}
22
23	str = replacer("<PTOBR>", "<br>", str);
24	return str;
25}
26
27function replacer(search, replace, str) {
28	// str.replace ersetzt nur 1x. Hier wird alles ersetzt
29	return str.split(search).join(replace);
30}