javascript regex data until new line

Question

I'm trying to remove all sentences if they start with particular character until break line. So far I created something like this but it removes only these particular characters instead of whole line. I'm not good with regex expressions so would be grateful if someone could throw some hint

From: ABC, DEF <[email protected] [mailto:[email protected]]>

Upcoming Events:

Hello hello

Sent: Thursday, February 28, 20117:22 PM

var cleanup = msg.replace(/From.|Sent.|To.|Cc.*\n/g, "");

current output:

ABC, DEF <[email protected] [mailto:[email protected]]>

Upcoming Out of Office:

Hello hello

Thursday, July 29, 2021 7:48 PM

expected output:

Upcoming Out of Office:
Hello hello

Wiktor Stribiżew · Accepted Answer · 2021-10-26 14:43:22Z

2

You can use

text = text.replace(/^\s*(?:From|Sent|To|Cc)\b.*[\r\n]*\s*/gm)

Or, if you need to also remove empty lines:

text = text.replace(/^(?:\s*(?:From|Sent|To|Cc)\b.*)?[\r\n]*\s*/gm)

See the regex demo #1 and regex demo #2. Details:

^ - start of a line (m flag allows that)
\s* - zero or more whitespaces
(?:From|Sent|To|Cc) - any of the alternatives
\b - a word boundary
.* - the rest of the line
[\r\n]* - zero or more CR or/and LF chars
\s* - zero or more whitespaces.

In the second regex, the \s*(?:From|Sent|To|Cc)\b.* part is made optional so that any libe breaks right after the beginning of a line could get consumed.

JavaScript demo:

const text = "From: ABC, DEF <[email protected] [mailto:[email protected]]>\n\nUpcoming Events:\n\nHello hello\n\nSent: Thursday, February 28, 20117:22 PM";
const rx = /^(?:\s*(?:From|Sent|To|Cc)\b.*)?[\r\n]*\s*/gm;
console.log(text.replace(rx, ""));

edited Oct 26, 2021 at 14:43

answered Oct 26, 2021 at 14:40

Wiktor Stribiżew

631k41 gold badges502 silver badges633 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

javascript regex data until new line

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related